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Pulsar configuration

Pulsar configuration can be managed via a series of configuration files contained in the conf directory of a Pulsar installation

BookKeeper​

BookKeeper is a replicated log storage system that Pulsar uses for durable storage of all messages.

NameDescriptionDefault
bookiePortThe port on which the bookie server listens.3181
allowLoopbackWhether the bookie is allowed to use a loopback interface as its primary interface (i.e. the interface used to establish its identity). By default, loopback interfaces are not allowed as the primary interface. Using a loopback interface as the primary interface usually indicates a configuration error. For example, it’s fairly common in some VPS setups to not configure a hostname or to have the hostname resolve to 127.0.0.1. If this is the case, then all bookies in the cluster will establish their identities as 127.0.0.1:3181 and only one will be able to join the cluster. For VPSs configured like this, you should explicitly set the listening interface.false
listeningInterfaceThe network interface on which the bookie listens. If not set, the bookie will listen on all interfaces.eth0
journalDirectoryThe directory where Bookkeeper outputs its write-ahead log (WAL)data/bookkeeper/journal
ledgerDirectoriesThe directory where Bookkeeper outputs ledger snapshots. This could define multiple directories to store snapshots separated by comma, for example ledgerDirectories=/tmp/bk1-data,/tmp/bk2-data. Ideally, ledger dirs and the journal dir are each in a different device, which reduces the contention between random I/O and sequential write. It is possible to run with a single disk, but performance will be significantly lower.data/bookkeeper/ledgers
ledgerManagerTypeThe type of ledger manager used to manage how ledgers are stored, managed, and garbage collected. See BookKeeper Internals for more info.hierarchical
zkLedgersRootPathThe root ZooKeeper path used to store ledger metadata. This parameter is used by the ZooKeeper-based ledger manager as a root znode to store all ledgers./ledgers
ledgerStorageClassLedger storage implementation classorg.apache.bookkeeper.bookie.storage.ldb.DbLedgerStorage
entryLogFilePreallocationEnabledEnable or disable entry logger preallocationtrue
logSizeLimitMax file size of the entry logger, in bytes. A new entry log file will be created when the old one reaches the file size limitation.1073741824
minorCompactionThresholdThreshold of minor compaction. Entry log files whose remaining size percentage reaches below this threshold will be compacted in a minor compaction. If set to less than zero, the minor compaction is disabled.0.2
minorCompactionIntervalTime interval to run minor compaction, in seconds. If set to less than zero, the minor compaction is disabled.3600
majorCompactionThresholdThe threshold of major compaction. Entry log files whose remaining size percentage reaches below this threshold will be compacted in a major compaction. Those entry log files whose remaining size percentage is still higher than the threshold will never be compacted. If set to less than zero, the minor compaction is disabled.0.5
majorCompactionIntervalThe time interval to run major compaction, in seconds. If set to less than zero, the major compaction is disabled.86400
compactionMaxOutstandingRequestsSets the maximum number of entries that can be compacted without flushing. When compacting, the entries are written to the entrylog and the new offsets are cached in memory. Once the entrylog is flushed the index is updated with the new offsets. This parameter controls the number of entries added to the entrylog before a flush is forced. A higher value for this parameter means more memory will be used for offsets. Each offset consists of 3 longs. This parameter should not be modified unless you’re fully aware of the consequences.100000
compactionRateThe rate at which compaction will read entries, in adds per second.1000
isThrottleByBytesThrottle compaction by bytes or by entries.false
compactionRateByEntriesThe rate at which compaction will read entries, in adds per second.1000
compactionRateByBytesSet the rate at which compaction reads entries. The unit is bytes added per second.1000000
journalMaxSizeMBMax file size of journal file, in megabytes. A new journal file will be created when the old one reaches the file size limitation.2048
journalMaxBackupsThe max number of old journal files to keep. Keeping a number of old journal files would help data recovery in special cases.5
journalPreAllocSizeMBHow space to pre-allocate at a time in the journal.16
journalWriteBufferSizeKBThe of the write buffers used for the journal.64
journalRemoveFromPageCacheWhether pages should be removed from the page cache after force write.true
journalAdaptiveGroupWritesWhether to group journal force writes, which optimizes group commit for higher throughput.true
journalMaxGroupWaitMSecThe maximum latency to impose on a journal write to achieve grouping.1
journalAlignmentSizeAll the journal writes and commits should be aligned to given size4096
journalBufferedWritesThresholdMaximum writes to buffer to achieve grouping524288
journalFlushWhenQueueEmptyIf we should flush the journal when journal queue is emptyfalse
numJournalCallbackThreadsThe number of threads that should handle journal callbacks8
rereplicationEntryBatchSizeThe number of max entries to keep in fragment for re-replication5000
openLedgerRereplicationGracePeriodThe grace period, in milliseconds, that the replication worker waits before fencing and replicating a ledger fragment that's still being written to upon bookie failure.30000
gcWaitTimeHow long the interval to trigger next garbage collection, in milliseconds. Since garbage collection is running in background, too frequent gc will heart performance. It is better to give a higher number of gc interval if there is enough disk capacity.900000
gcOverreplicatedLedgerWaitTimeHow long the interval to trigger next garbage collection of overreplicated ledgers, in milliseconds. This should not be run very frequently since we read the metadata for all the ledgers on the bookie from zk.86400000
flushIntervalHow long the interval to flush ledger index pages to disk, in milliseconds. Flushing index files will introduce much random disk I/O. If separating journal dir and ledger dirs each on different devices, flushing would not affect performance. But if putting journal dir and ledger dirs on same device, performance degrade significantly on too frequent flushing. You can consider increment flush interval to get better performance, but you need to pay more time on bookie server restart after failure.60000
bookieDeathWatchIntervalInterval to watch whether bookie is dead or not, in milliseconds1000
zkServersA list of one of more servers on which zookeeper is running. The server list can be comma separated values, for example: zkServers=zk1:2181,zk2:2181,zk3:2181.localhost:2181
zkTimeoutZooKeeper client session timeout in milliseconds Bookie server will exit if it received SESSION_EXPIRED because it was partitioned off from ZooKeeper for more than the session timeout JVM garbage collection, disk I/O will cause SESSION_EXPIRED. Increment this value could help avoiding this issue30000
serverTcpNoDelayThis settings is used to enabled/disabled Nagle’s algorithm, which is a means of improving the efficiency of TCP/IP networks by reducing the number of packets that need to be sent over the network. If you are sending many small messages, such that more than one can fit in a single IP packet, setting server.tcpnodelay to false to enable Nagle algorithm can provide better performance.true
openFileLimitMax number of ledger index files could be opened in bookie server If number of ledger index files reaches this limitation, bookie server started to swap some ledgers from memory to disk. Too frequent swap will affect performance. You can tune this number to gain performance according your requirements.0
pageSizeSize of a index page in ledger cache, in bytes A larger index page can improve performance writing page to disk, which is efficient when you have small number of ledgers and these ledgers have similar number of entries. If you have large number of ledgers and each ledger has fewer entries, smaller index page would improve memory usage.8192
pageLimitHow many index pages provided in ledger cache If number of index pages reaches this limitation, bookie server starts to swap some ledgers from memory to disk. You can increment this value when you found swap became more frequent. But make sure pageLimit*pageSize should not more than JVM max memory limitation, otherwise you would got OutOfMemoryException. In general, incrementing pageLimit, using smaller index page would gain better performance in lager number of ledgers with fewer entries case If pageLimit is -1, bookie server will use 1/3 of JVM memory to compute the limitation of number of index pages.0
readOnlyModeEnabledIf all ledger directories configured are full, then support only read requests for clients. If "readOnlyModeEnabled=true" then on all ledger disks full, bookie will be converted to read-only mode and serve only read requests. Otherwise the bookie will be shutdown. By default this will be disabled.true
diskUsageThresholdFor each ledger dir, maximum disk space which can be used. Default is 0.95f. i.e. 95% of disk can be used at most after which nothing will be written to that partition. If all ledger dir partitions are full, then bookie will turn to readonly mode if ‘readOnlyModeEnabled=true’ is set, else it will shutdown. Valid values should be in between 0 and 1 (exclusive).0.95
diskCheckIntervalDisk check interval in milli seconds, interval to check the ledger dirs usage.10000
auditorPeriodicCheckIntervalInterval at which the auditor will do a check of all ledgers in the cluster. By default this runs once a week. The interval is set in seconds. To disable the periodic check completely, set this to 0. Note that periodic checking will put extra load on the cluster, so it should not be run more frequently than once a day.604800
auditorPeriodicBookieCheckIntervalThe interval between auditor bookie checks. The auditor bookie check, checks ledger metadata to see which bookies should contain entries for each ledger. If a bookie which should contain entries is unavailable, thea the ledger containing that entry is marked for recovery. Setting this to 0 disabled the periodic check. Bookie checks will still run when a bookie fails. The interval is specified in seconds.86400
numAddWorkerThreadsnumber of threads that should handle write requests. if zero, the writes would be handled by netty threads directly.0
numReadWorkerThreadsnumber of threads that should handle read requests. if zero, the reads would be handled by netty threads directly.8
maxPendingReadRequestsPerThreadIf read workers threads are enabled, limit the number of pending requests, to avoid the executor queue to grow indefinitely.2500
readBufferSizeBytesThe number of bytes we should use as capacity for BufferedReadChannel.4096
writeBufferSizeBytesThe number of bytes used as capacity for the write buffer65536
useHostNameAsBookieIDWhether the bookie should use its hostname to register with the coordination service (e.g.: zookeeper service). When false, bookie will use its ipaddress for the registration.false
statsProviderClassorg.apache.bookkeeper.stats.prometheus.PrometheusMetricsProvider
prometheusStatsHttpPort8000
dbStorage_writeCacheMaxSizeMbSize of Write Cache. Memory is allocated from JVM direct memory. Write cache is used to buffer entries before flushing into the entry log For good performance, it should be big enough to hold a substantial amount of entries in the flush interval.25% of direct memory
dbStorage_readAheadCacheMaxSizeMbSize of Read cache. Memory is allocated from JVM direct memory. This read cache is pre-filled doing read-ahead whenever a cache miss happens25% of direct memory
dbStorage_readAheadCacheBatchSizeHow many entries to pre-fill in cache after a read cache miss1000
dbStorage_rocksDB_blockCacheSizeSize of RocksDB block-cache. For best performance, this cache should be big enough to hold a significant portion of the index database which can reach ~2GB in some cases10% of direct memory
dbStorage_rocksDB_writeBufferSizeMB64
dbStorage_rocksDB_sstSizeInMB64
dbStorage_rocksDB_blockSize65536
dbStorage_rocksDB_bloomFilterBitsPerKey10
dbStorage_rocksDB_numLevels-1
dbStorage_rocksDB_numFilesInLevel04
dbStorage_rocksDB_maxSizeInLevel1MB256
nettyMaxFrameSizeBytesSet the maximum netty frame size in bytes. If the size of a received message is larger than the configured value, the message is rejected.1 GB

Broker​

Pulsar brokers are responsible for handling incoming messages from producers, dispatching messages to consumers, replicating data between clusters, and more.

NameDescriptionDefault
advertisedListenersSpecify multiple advertised listeners for the broker.

The format is <listener_name>:pulsar://<host>:<port>.

If there are multiple listeners, separate them with commas.

Note: do not use this configuration with advertisedAddress and brokerServicePort. If the value of this configuration is empty, the broker uses advertisedAddress and brokerServicePort
/
internalListenerNameSpecify the internal listener name for the broker.

Note: the listener name must be contained in advertisedListeners.

If the value of this configuration is empty, the broker uses the first listener as the internal listener.
/
enablePersistentTopicsWhether persistent topics are enabled on the brokertrue
enableNonPersistentTopicsWhether non-persistent topics are enabled on the brokertrue
functionsWorkerEnabledWhether the Pulsar Functions worker service is enabled in the brokerfalse
zookeeperServersZookeeper quorum connection string
zooKeeperCacheExpirySecondsZooKeeper cache expiry time in seconds300
configurationStoreServersConfiguration store connection string (as a comma-separated list)
brokerServicePortBroker data port6650
brokerServicePortTlsBroker data port for TLS6651
webServicePortPort to use to server HTTP request8080
webServicePortTlsPort to use to server HTTPS request8443
webSocketServiceEnabledEnable the WebSocket API service in brokerfalse
bindAddressHostname or IP address the service binds on, default is 0.0.0.0.0.0.0.0
advertisedAddressHostname or IP address the service advertises to the outside world. If not set, the value of InetAddress.getLocalHost().getHostName() is used.
clusterNameName of the cluster to which this broker belongs to
brokerDeduplicationEnabledSets the default behavior for message deduplication in the broker. If enabled, the broker will reject messages that were already stored in the topic. This setting can be overridden on a per-namespace basis.false
brokerDeduplicationMaxNumberOfProducersThe maximum number of producers for which information will be stored for deduplication purposes.10000
brokerDeduplicationEntriesIntervalThe number of entries after which a deduplication informational snapshot is taken. A larger interval will lead to fewer snapshots being taken, though this would also lengthen the topic recovery time (the time required for entries published after the snapshot to be replayed).1000
brokerDeduplicationProducerInactivityTimeoutMinutesThe time of inactivity (in minutes) after which the broker will discard deduplication information related to a disconnected producer.360
dispatchThrottlingRatePerReplicatorInMsgThe default messages per second dispatch throttling-limit for every replicator in replication. The value of 0 means disabling replication message dispatch-throttling0
dispatchThrottlingRatePerReplicatorInByteThe default bytes per second dispatch throttling-limit for every replicator in replication. The value of 0 means disabling replication message-byte dispatch-throttling0
zooKeeperSessionTimeoutMillisZookeeper session timeout in milliseconds30000
brokerShutdownTimeoutMsTime to wait for broker graceful shutdown. After this time elapses, the process will be killed60000
skipBrokerShutdownOnOOMFlag to skip broker shutdown when broker handles Out of memory error.false
backlogQuotaCheckEnabledEnable backlog quota check. Enforces action on topic when the quota is reachedtrue
backlogQuotaCheckIntervalInSecondsHow often to check for topics that have reached the quota60
backlogQuotaDefaultLimitGBThe default per-topic backlog quota limit-1
allowAutoTopicCreationEnable topic auto creation if a new producer or consumer connectedtrue
allowAutoTopicCreationTypeThe topic type (partitioned or non-partitioned) that is allowed to be automatically created.Partitioned
allowAutoSubscriptionCreationEnable subscription auto creation if a new consumer connectedtrue
defaultNumPartitionsThe number of partitioned topics that is allowed to be automatically created if allowAutoTopicCreationType is partitioned1
brokerDeleteInactiveTopicsEnabledEnable the deletion of inactive topics. If topics are not consumed for some while, these inactive topics might be cleaned up. Deleting inactive topics is enabled by default. The default period is 1 minute.true
brokerDeleteInactiveTopicsFrequencySecondsHow often to check for inactive topics60
brokerDeleteInactiveTopicsModeSet the mode to delete inactive topics.
  • delete_when_no_subscriptions: delete the topic which has no subscriptions or active producers.
  • delete_when_subscriptions_caught_up: delete the topic whose subscriptions have no backlogs and which has no active producers or consumers.
  • delete_when_no_subscriptions
    brokerDeleteInactiveTopicsMaxInactiveDurationSecondsSet the maximum duration for inactive topics. If it is not specified, the brokerDeleteInactiveTopicsFrequencySeconds parameter is adopted.N/A
    messageExpiryCheckIntervalInMinutesHow frequently to proactively check and purge expired messages5
    brokerServiceCompactionMonitorIntervalInSecondsInterval between checks to see if topics with compaction policies need to be compacted60
    activeConsumerFailoverDelayTimeMillisHow long to delay rewinding cursor and dispatching messages when active consumer is changed.1000
    clientLibraryVersionCheckEnabledEnable check for minimum allowed client library versionfalse
    clientLibraryVersionCheckAllowUnversionedAllow client libraries with no version informationtrue
    statusFilePathPath for the file used to determine the rotation status for the broker when responding to service discovery health checks
    preferLaterVersionsIf true, (and ModularLoadManagerImpl is being used), the load manager will attempt to use only brokers running the latest software version (to minimize impact to bundles)false
    maxNumPartitionsPerPartitionedTopicMax number of partitions per partitioned topic. Use 0 or negative number to disable the check0
    tlsEnabledEnable TLSfalse
    tlsCertificateFilePathPath for the TLS certificate file
    tlsKeyFilePathPath for the TLS private key file
    tlsTrustCertsFilePathPath for the trusted TLS certificate file
    tlsAllowInsecureConnectionAccept untrusted TLS certificate from clientfalse
    tlsProtocolsSpecify the tls protocols the broker will use to negotiate during TLS Handshake. Multiple values can be specified, separated by commas. Example:- TLSv1.2, TLSv1.1, TLSv1
    tlsCiphersSpecify the tls cipher the broker will use to negotiate during TLS Handshake. Multiple values can be specified, separated by commas. Example:- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
    tlsEnabledWithKeyStoreEnable TLS with KeyStore type configuration in brokerfalse
    tlsProviderTLS Provider for KeyStore type
    tlsKeyStoreTypeLS KeyStore type configuration in broker: JKS, PKCS12JKS
    tlsKeyStoreTLS KeyStore path in broker
    tlsKeyStorePasswordTLS KeyStore password for broker
    brokerClientTlsEnabledWithKeyStoreWhether internal client use KeyStore type to authenticate with Pulsar brokersfalse
    brokerClientSslProviderThe TLS Provider used by internal client to authenticate with other Pulsar brokers
    brokerClientTlsTrustStoreTypeTLS TrustStore type configuration for internal client: JKS, PKCS12, used by the internal client to authenticate with Pulsar brokersJKS
    brokerClientTlsTrustStoreTLS TrustStore path for internal client, used by the internal client to authenticate with Pulsar brokers
    brokerClientTlsTrustStorePasswordTLS TrustStore password for internal client, used by the internal client to authenticate with Pulsar brokers
    brokerClientTlsCiphersSpecify the tls cipher the internal client will use to negotiate during TLS Handshake. (a comma-separated list of ciphers) e.g. [TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256]
    brokerClientTlsProtocolsSpecify the tls protocols the broker will use to negotiate during TLS handshake. (a comma-separated list of protocol names). e.g. [TLSv1.2, TLSv1.1, TLSv1]
    ttlDurationDefaultInSecondsThe default Time to Live (TTL) for namespaces if the TTL is not configured at namespace policies. When the value is set to 0, TTL is disabled. By default, TTL is disabled.0
    tokenSecretKeyConfigure the secret key to be used to validate auth tokens. The key can be specified like: tokenSecretKey=data:;base64,xxxxxxxxx or tokenSecretKey=file:///my/secret.key
    tokenPublicKeyConfigure the public key to be used to validate auth tokens. The key can be specified like: tokenPublicKey=data:;base64,xxxxxxxxx or tokenPublicKey=file:///my/secret.key
    tokenPublicAlgConfigure the algorithm to be used to validate auth tokens. This can be any of the asymettric algorithms supported by Java JWT (https://github.com/jwtk/jjwt#signature-algorithms-keys)RS256
    tokenAuthClaimSpecify which of the token's claims will be used as the authentication "principal" or "role". The default "sub" claim will be used if this is left blank
    tokenAudienceClaimThe token audience "claim" name, e.g. "aud", that will be used to get the audience from token. If not set, audience will not be verified.
    tokenAudienceThe token audience stands for this broker. The field tokenAudienceClaim of a valid token, need contains this.
    maxUnackedMessagesPerConsumerMax number of unacknowledged messages allowed to receive messages by a consumer on a shared subscription. Broker will stop sending messages to consumer once, this limit reaches until consumer starts acknowledging messages back. Using a value of 0, is disabling unackeMessage limit check and consumer can receive messages without any restriction50000
    maxUnackedMessagesPerSubscriptionMax number of unacknowledged messages allowed per shared subscription. Broker will stop dispatching messages to all consumers of the subscription once this limit reaches until consumer starts acknowledging messages back and unack count reaches to limit/2. Using a value of 0, is disabling unackedMessage-limit check and dispatcher can dispatch messages without any restriction200000
    subscriptionRedeliveryTrackerEnabledEnable subscription message redelivery trackertrue
    subscriptionExpirationTimeMinutesHow long to delete inactive subscriptions from last consuming.

    Setting this configuration to a value greater than 0 deletes inactive subscriptions automatically.
    Setting this configuration to 0 does not delete inactive subscriptions automatically.

    Since this configuration takes effect on all topics, if there is even one topic whose subscriptions should not be deleted automatically, you need to set it to 0.
    Instead, you can set a subscription expiration time for each namespace using the pulsar-admin namespaces set-subscription-expiration-time options command.
    0
    maxConcurrentLookupRequestMax number of concurrent lookup request broker allows to throttle heavy incoming lookup traffic50000
    maxConcurrentTopicLoadRequestMax number of concurrent topic loading request broker allows to control number of zk-operations5000
    authenticationEnabledEnable authenticationfalse
    authenticationProvidersAuthentication provider name list, which is comma separated list of class names
    authorizationEnabledEnforce authorizationfalse
    superUserRolesRole names that are treated as "super-user", meaning they will be able to do all admin operations and publish/consume from all topics
    brokerClientAuthenticationPluginAuthentication settings of the broker itself. Used when the broker connects to other brokers, either in same or other clusters
    brokerClientAuthenticationParameters
    athenzDomainNamesSupported Athenz provider domain names(comma separated) for authentication
    exposePreciseBacklogInPrometheusEnable expose the precise backlog stats, set false to use published counter and consumed counter to calculate, this would be more efficient but may be inaccurate.false
    bookkeeperMetadataServiceUriMetadata service uri that bookkeeper is used for loading corresponding metadata driver and resolving its metadata service location. This value can be fetched using bookkeeper shell whatisinstanceid command in BookKeeper cluster. For example: zk+hierarchical://localhost:2181/ledgers. The metadata service uri list can also be semicolon separated values like below: zk+hierarchical://zk1:2181;zk2:2181;zk3:2181/ledgers
    bookkeeperClientAuthenticationPluginAuthentication plugin to use when connecting to bookies
    bookkeeperClientAuthenticationParametersNameBookKeeper auth plugin implementation specifics parameters name and values
    bookkeeperClientAuthenticationParameters
    bookkeeperClientTimeoutInSecondsTimeout for BK add / read operations30
    bookkeeperClientSpeculativeReadTimeoutInMillisSpeculative reads are initiated if a read request doesn’t complete within a certain time Using a value of 0, is disabling the speculative reads0
    bookkeeperClientHealthCheckEnabledEnable bookies health check. Bookies that have more than the configured number of failure within the interval will be quarantined for some time. During this period, new ledgers won’t be created on these bookiestrue
    bookkeeperClientHealthCheckIntervalSeconds60
    bookkeeperClientHealthCheckErrorThresholdPerInterval5
    bookkeeperClientHealthCheckQuarantineTimeInSeconds1800
    bookkeeperClientRackawarePolicyEnabledEnable rack-aware bookie selection policy. BK will chose bookies from different racks when forming a new bookie ensembletrue
    bookkeeperClientRegionawarePolicyEnabledEnable region-aware bookie selection policy. BK will chose bookies from different regions and racks when forming a new bookie ensemble. If enabled, the value of bookkeeperClientRackawarePolicyEnabled is ignoredfalse
    bookkeeperClientReorderReadSequenceEnabledEnable/disable reordering read sequence on reading entries.false
    bookkeeperClientIsolationGroupsEnable bookie isolation by specifying a list of bookie groups to choose from. Any bookie outside the specified groups will not be used by the broker
    bookkeeperClientSecondaryIsolationGroupsEnable bookie secondary-isolation group if bookkeeperClientIsolationGroups doesn't have enough bookie available.
    bookkeeperClientMinAvailableBookiesInIsolationGroupsMinimum bookies that should be available as part of bookkeeperClientIsolationGroups else broker will include bookkeeperClientSecondaryIsolationGroups bookies in isolated list.
    bookkeeperClientGetBookieInfoIntervalSecondsSet the interval to periodically check bookie info86400
    bookkeeperClientGetBookieInfoRetryIntervalSecondsSet the interval to retry a failed bookie info lookup60
    bookkeeperEnableStickyReadsEnable/disable having read operations for a ledger to be sticky to a single bookie. If this flag is enabled, the client will use one single bookie (by preference) to read all entries for a ledger.true
    managedLedgerDefaultEnsembleSizeNumber of bookies to use when creating a ledger2
    managedLedgerDefaultWriteQuorumNumber of copies to store for each message2
    managedLedgerDefaultAckQuorumNumber of guaranteed copies (acks to wait before write is complete)2
    managedLedgerCacheSizeMBAmount of memory to use for caching data payload in managed ledger. This memory is allocated from JVM direct memory and it’s shared across all the topics running in the same broker. By default, uses 1/5th of available direct memory
    managedLedgerCacheCopyEntriesWhether we should make a copy of the entry payloads when inserting in cachefalse
    managedLedgerCacheEvictionWatermarkThreshold to which bring down the cache level when eviction is triggered0.9
    managedLedgerCacheEvictionFrequencyConfigure the cache eviction frequency for the managed ledger cache (evictions/sec)100.0
    managedLedgerCacheEvictionTimeThresholdMillisAll entries that have stayed in cache for more than the configured time, will be evicted1000
    managedLedgerCursorBackloggedThresholdConfigure the threshold (in number of entries) from where a cursor should be considered 'backlogged' and thus should be set as inactive.1000
    managedLedgerDefaultMarkDeleteRateLimitRate limit the amount of writes per second generated by consumer acking the messages1.0
    managedLedgerMaxEntriesPerLedgerThe max number of entries to append to a ledger before triggering a rollover. A ledger rollover is triggered after the min rollover time has passed and one of the following conditions is true:
    • The max rollover time has been reached
    • The max entries have been written to the ledger
    • The max ledger size has been written to the ledger
    50000
    managedLedgerMinLedgerRolloverTimeMinutesMinimum time between ledger rollover for a topic10
    managedLedgerMaxLedgerRolloverTimeMinutesMaximum time before forcing a ledger rollover for a topic240
    managedLedgerCursorMaxEntriesPerLedgerMax number of entries to append to a cursor ledger50000
    managedLedgerCursorRolloverTimeInSecondsMax time before triggering a rollover on a cursor ledger14400
    managedLedgerMaxUnackedRangesToPersistMax number of "acknowledgment holes" that are going to be persistently stored. When acknowledging out of order, a consumer will leave holes that are supposed to be quickly filled by acking all the messages. The information of which messages are acknowledged is persisted by compressing in "ranges" of messages that were acknowledged. After the max number of ranges is reached, the information will only be tracked in memory and messages will be redelivered in case of crashes.1000
    autoSkipNonRecoverableDataSkip reading non-recoverable/unreadable data-ledger under managed-ledger’s list.It helps when data-ledgers gets corrupted at bookkeeper and managed-cursor is stuck at that ledger.false
    loadBalancerEnabledEnable load balancertrue
    loadBalancerPlacementStrategyStrategy to assign a new bundle weightedRandomSelection
    loadBalancerReportUpdateThresholdPercentagePercentage of change to trigger load report update10
    loadBalancerReportUpdateMaxIntervalMinutesmaximum interval to update load report15
    loadBalancerHostUsageCheckIntervalMinutesFrequency of report to collect1
    loadBalancerSheddingIntervalMinutesLoad shedding interval. Broker periodically checks whether some traffic should be offload from some over-loaded broker to other under-loaded brokers30
    loadBalancerSheddingGracePeriodMinutesPrevent the same topics to be shed and moved to other broker more than once within this timeframe30
    loadBalancerBrokerMaxTopicsUsage threshold to allocate max number of topics to broker50000
    loadBalancerBrokerUnderloadedThresholdPercentageUsage threshold to determine a broker as under-loaded1
    loadBalancerBrokerOverloadedThresholdPercentageUsage threshold to determine a broker as over-loaded85
    loadBalancerResourceQuotaUpdateIntervalMinutesInterval to update namespace bundle resource quota15
    loadBalancerBrokerComfortLoadLevelPercentageUsage threshold to determine a broker is having just right level of load65
    loadBalancerAutoBundleSplitEnabledenable/disable namespace bundle auto splitfalse
    loadBalancerNamespaceBundleMaxTopicsmaximum topics in a bundle, otherwise bundle split will be triggered1000
    loadBalancerNamespaceBundleMaxSessionsmaximum sessions (producers + consumers) in a bundle, otherwise bundle split will be triggered1000
    loadBalancerNamespaceBundleMaxMsgRatemaximum msgRate (in + out) in a bundle, otherwise bundle split will be triggered1000
    loadBalancerNamespaceBundleMaxBandwidthMbytesmaximum bandwidth (in + out) in a bundle, otherwise bundle split will be triggered100
    loadBalancerNamespaceMaximumBundlesmaximum number of bundles in a namespace128
    replicationMetricsEnabledEnable replication metricstrue
    replicationConnectionsPerBrokerMax number of connections to open for each broker in a remote cluster More connections host-to-host lead to better throughput over high-latency links.16
    replicationProducerQueueSizeReplicator producer queue size1000
    replicatorPrefixReplicator prefix used for replicator producer name and cursor name pulsar.repl
    replicationTlsEnabledEnable TLS when talking with other clusters to replicate messagesfalse
    defaultRetentionTimeInMinutesDefault message retention time. 0 means retention is disabled. -1 means data is not removed by time quota
    defaultRetentionSizeInMBDefault retention size. 0 means retention is disabled. -1 means data is not removed by size quota0
    keepAliveIntervalSecondsHow often to check whether the connections are still alive30
    loadManagerClassNameName of load manager to useorg.apache.pulsar.broker.loadbalance.impl.SimpleLoadManagerImpl
    supportedNamespaceBundleSplitAlgorithmsSupported algorithms name for namespace bundle split[range_equally_divide,topic_count_equally_divide]
    defaultNamespaceBundleSplitAlgorithmDefault algorithm name for namespace bundle splitrange_equally_divide
    managedLedgerOffloadDriverDriver to use to offload old data to long term storage (Possible values: S3)
    managedLedgerOffloadMaxThreadsMaximum number of thread pool threads for ledger offloading2
    managedLedgerUnackedRangesOpenCacheSetEnabledUse Open Range-Set to cache unacknowledged messagestrue
    managedLedgerOffloadDeletionLagMsDelay between a ledger being successfully offloaded to long term storage and the ledger being deleted from bookkeeper14400000
    managedLedgerOffloadAutoTriggerSizeThresholdBytesThe number of bytes before triggering automatic offload to long term storage-1 (disabled)
    s3ManagedLedgerOffloadRegionFor Amazon S3 ledger offload, AWS region
    s3ManagedLedgerOffloadBucketFor Amazon S3 ledger offload, Bucket to place offloaded ledger into
    s3ManagedLedgerOffloadServiceEndpointFor Amazon S3 ledger offload, Alternative endpoint to connect to (useful for testing)
    s3ManagedLedgerOffloadMaxBlockSizeInBytesFor Amazon S3 ledger offload, Max block size in bytes. (64MB by default, 5MB minimum)67108864
    s3ManagedLedgerOffloadReadBufferSizeInBytesFor Amazon S3 ledger offload, Read buffer size in bytes (1MB by default)1048576
    s3ManagedLedgerOffloadRoleFor Amazon S3 ledger offload, provide a role to assume before writing to s3
    s3ManagedLedgerOffloadRoleSessionNameFor Amazon S3 ledger offload, provide a role session name when using a rolepulsar-s3-offload
    acknowledgmentAtBatchIndexLevelEnabledEnable or disable the batch index acknowledgement.false
    maxMessageSizeSet the maximum size of a message.5 MB
    preciseTopicPublishRateLimiterEnableEnable precise topic publish rate limiting.false

    Client​

    The pulsar-client CLI tool can be used to publish messages to Pulsar and consume messages from Pulsar topics. This tool can be used in lieu of a client library.

    NameDescriptionDefault
    webServiceUrlThe web URL for the cluster.http://localhost:8080/
    brokerServiceUrlThe Pulsar protocol URL for the cluster.pulsar://localhost:6650/
    authPluginThe authentication plugin.
    authParamsThe authentication parameters for the cluster, as a comma-separated string.
    useTlsWhether or not TLS authentication will be enforced in the cluster.false
    tlsAllowInsecureConnection
    tlsTrustCertsFilePath

    Service discovery​

    NameDescriptionDefault
    zookeeperServersZookeeper quorum connection string (comma-separated)
    zooKeeperCacheExpirySecondsZooKeeper cache expiry time in seconds300
    configurationStoreServersConfiguration store connection string (as a comma-separated list)
    zookeeperSessionTimeoutMsZooKeeper session timeout30000
    servicePortPort to use to server binary-proto request6650
    servicePortTlsPort to use to server binary-proto-tls request6651
    webServicePortPort that discovery service listen on8080
    webServicePortTlsPort to use to server HTTPS request8443
    bindOnLocalhostControl whether to bind directly on localhost rather than on normal hostnamefalse
    authenticationEnabledEnable authenticationfalse
    authenticationProvidersAuthentication provider name list, which is comma separated list of class names (comma-separated)
    authorizationEnabledEnforce authorizationfalse
    superUserRolesRole names that are treated as "super-user", meaning they will be able to do all admin operations and publish/consume from all topics (comma-separated)
    tlsEnabledEnable TLSfalse
    tlsCertificateFilePathPath for the TLS certificate file
    tlsKeyFilePathPath for the TLS private key file

    Log4j​

    NameDefault
    pulsar.root.loggerWARN,CONSOLE
    pulsar.log.dirlogs
    pulsar.log.filepulsar.log
    log4j.rootLogger${pulsar.root.logger}
    log4j.appender.CONSOLEorg.apache.log4j.ConsoleAppender
    log4j.appender.CONSOLE.ThresholdDEBUG
    log4j.appender.CONSOLE.layoutorg.apache.log4j.PatternLayout
    log4j.appender.CONSOLE.layout.ConversionPattern%d{ISO8601} - %-5p - [%t:%C{1}@%L] - %m%n
    log4j.appender.ROLLINGFILEorg.apache.log4j.DailyRollingFileAppender
    log4j.appender.ROLLINGFILE.ThresholdDEBUG
    log4j.appender.ROLLINGFILE.Filepulsar.log.dir/{pulsar.log.dir}/{pulsar.log.file}
    log4j.appender.ROLLINGFILE.layoutorg.apache.log4j.PatternLayout
    log4j.appender.ROLLINGFILE.layout.ConversionPattern%d{ISO8601} - %-5p [%t:%C{1}@%L] - %m%n
    log4j.appender.TRACEFILEorg.apache.log4j.FileAppender
    log4j.appender.TRACEFILE.ThresholdTRACE
    log4j.appender.TRACEFILE.Filepulsar-trace.log
    log4j.appender.TRACEFILE.layoutorg.apache.log4j.PatternLayout
    log4j.appender.TRACEFILE.layout.ConversionPattern%d{ISO8601} - %-5p [%t:%C{1}@%L][%x] - %m%n

    Log4j shell​

    NameDefault
    bookkeeper.root.loggerERROR,CONSOLE
    log4j.rootLogger${bookkeeper.root.logger}
    log4j.appender.CONSOLEorg.apache.log4j.ConsoleAppender
    log4j.appender.CONSOLE.ThresholdDEBUG
    log4j.appender.CONSOLE.layoutorg.apache.log4j.PatternLayout
    log4j.appender.CONSOLE.layout.ConversionPattern%d{ABSOLUTE} %-5p %m%n
    log4j.logger.org.apache.zookeeperERROR
    log4j.logger.org.apache.bookkeeperERROR
    log4j.logger.org.apache.bookkeeper.bookie.BookieShellINFO

    Standalone​

    NameDescriptionDefault
    zookeeperServersThe quorum connection string for local ZooKeeper
    zooKeeperCacheExpirySecondsZooKeeper cache expiry time in seconds300
    configurationStoreServersConfiguration store connection string (as a comma-separated list)
    brokerServicePortThe port on which the standalone broker listens for connections6650
    webServicePortThe port used by the standalone broker for HTTP requests8080
    bindAddressThe hostname or IP address on which the standalone service binds0.0.0.0
    advertisedAddressThe hostname or IP address that the standalone service advertises to the outside world. If not set, the value of InetAddress.getLocalHost().getHostName() is used.
    clusterNameThe name of the cluster that this broker belongs to.standalone
    zooKeeperSessionTimeoutMillisThe ZooKeeper session timeout, in milliseconds.30000
    brokerShutdownTimeoutMsThe time to wait for graceful broker shutdown. After this time elapses, the process will be killed.60000
    skipBrokerShutdownOnOOMFlag to skip broker shutdown when broker handles Out of memory error.false
    backlogQuotaCheckEnabledEnable the backlog quota check, which enforces a specified action when the quota is reached.true
    backlogQuotaCheckIntervalInSecondsHow often to check for topics that have reached the backlog quota.60
    backlogQuotaDefaultLimitGBThe default per-topic backlog quota limit.10
    ttlDurationDefaultInSecondsThe default Time to Live (TTL) for namespaces if the TTL is not configured at namespace policies. When the value is set to 0, TTL is disabled. By default, TTL is disabled.0
    brokerDeleteInactiveTopicsEnabledEnable the deletion of inactive topics. If topics are not consumed for some while, these inactive topics might be cleaned up. Deleting inactive topics is enabled by default. The default period is 1 minute.true
    brokerDeleteInactiveTopicsFrequencySecondsHow often to check for inactive topics, in seconds.60
    messageExpiryCheckIntervalInMinutesHow often to proactively check and purged expired messages.5
    activeConsumerFailoverDelayTimeMillisHow long to delay rewinding cursor and dispatching messages when active consumer is changed.1000
    clientLibraryVersionCheckEnabledEnable checks for minimum allowed client library version.false
    clientLibraryVersionCheckAllowUnversionedAllow client libraries with no version informationtrue
    statusFilePathThe path for the file used to determine the rotation status for the broker when responding to service discovery health checks/usr/local/apache/htdocs
    maxUnackedMessagesPerConsumerThe maximum number of unacknowledged messages allowed to be received by consumers on a shared subscription. The broker will stop sending messages to a consumer once this limit is reached or until the consumer begins acknowledging messages. A value of 0 disables the unacked message limit check and thus allows consumers to receive messages without any restrictions.50000
    maxUnackedMessagesPerSubscriptionThe same as above, except per subscription rather than per consumer.200000
    maxNumPartitionsPerPartitionedTopicMax number of partitions per partitioned topic. Use 0 or negative number to disable the check0
    authenticationEnabledEnable authentication for the broker.false
    authenticationProvidersA comma-separated list of class names for authentication providers.false
    authorizationEnabledEnforce authorization in brokers.false
    superUserRolesRole names that are treated as "superusers." Superusers are authorized to perform all admin tasks.
    brokerClientAuthenticationPluginThe authentication settings of the broker itself. Used when the broker connects to other brokers either in the same cluster or from other clusters.
    brokerClientAuthenticationParametersThe parameters that go along with the plugin specified using brokerClientAuthenticationPlugin.
    athenzDomainNamesSupported Athenz authentication provider domain names as a comma-separated list.
    exposePreciseBacklogInPrometheusEnable expose the precise backlog stats, set false to use published counter and consumed counter to calculate, this would be more efficient but may be inaccurate.false
    bookkeeperClientAuthenticationPluginAuthentication plugin to be used when connecting to bookies (BookKeeper servers).
    bookkeeperClientAuthenticationParametersNameBookKeeper authentication plugin implementation parameters and values.
    bookkeeperClientAuthenticationParametersParameters associated with the bookkeeperClientAuthenticationParametersName
    bookkeeperClientTimeoutInSecondsTimeout for BookKeeper add and read operations.30
    bookkeeperClientSpeculativeReadTimeoutInMillisSpeculative reads are initiated if a read request doesn’t complete within a certain time. A value of 0 disables speculative reads.0
    bookkeeperClientHealthCheckEnabledEnable bookie health checks.true
    bookkeeperClientHealthCheckIntervalSecondsThe time interval, in seconds, at which health checks are performed. New ledgers are not created during health checks.60
    bookkeeperClientHealthCheckErrorThresholdPerIntervalError threshold for health checks.5
    bookkeeperClientHealthCheckQuarantineTimeInSecondsIf bookies have more than the allowed number of failures within the time interval specified by bookkeeperClientHealthCheckIntervalSeconds1800
    bookkeeperClientRackawarePolicyEnabledtrue
    bookkeeperClientRegionawarePolicyEnabledfalse
    bookkeeperClientReorderReadSequenceEnabledfalse
    bookkeeperClientIsolationGroups
    bookkeeperClientSecondaryIsolationGroupsEnable bookie secondary-isolation group if bookkeeperClientIsolationGroups doesn't have enough bookie available.
    bookkeeperClientMinAvailableBookiesInIsolationGroupsMinimum bookies that should be available as part of bookkeeperClientIsolationGroups else broker will include bookkeeperClientSecondaryIsolationGroups bookies in isolated list.
    managedLedgerDefaultEnsembleSize1
    managedLedgerDefaultWriteQuorum1
    managedLedgerDefaultAckQuorum1
    managedLedgerCacheSizeMB1024
    managedLedgerCacheCopyEntriesWhether we should make a copy of the entry payloads when inserting in cachefalse
    managedLedgerCacheEvictionWatermark0.9
    managedLedgerCacheEvictionFrequencyConfigure the cache eviction frequency for the managed ledger cache (evictions/sec)100.0
    managedLedgerCacheEvictionTimeThresholdMillisAll entries that have stayed in cache for more than the configured time, will be evicted1000
    managedLedgerCursorBackloggedThresholdConfigure the threshold (in number of entries) from where a cursor should be considered 'backlogged' and thus should be set as inactive.1000
    managedLedgerUnackedRangesOpenCacheSetEnabledUse Open Range-Set to cache unacknowledged messagestrue
    managedLedgerDefaultMarkDeleteRateLimit0.1
    managedLedgerMaxEntriesPerLedger50000
    managedLedgerMinLedgerRolloverTimeMinutes10
    managedLedgerMaxLedgerRolloverTimeMinutes240
    managedLedgerCursorMaxEntriesPerLedger50000
    managedLedgerCursorRolloverTimeInSeconds14400
    autoSkipNonRecoverableDatafalse
    loadBalancerEnabledfalse
    loadBalancerPlacementStrategyweightedRandomSelection
    loadBalancerReportUpdateThresholdPercentage10
    loadBalancerReportUpdateMaxIntervalMinutes15
    loadBalancerHostUsageCheckIntervalMinutes1
    loadBalancerSheddingIntervalMinutes30
    loadBalancerSheddingGracePeriodMinutes30
    loadBalancerBrokerMaxTopics50000
    loadBalancerBrokerUnderloadedThresholdPercentage1
    loadBalancerBrokerOverloadedThresholdPercentage85
    loadBalancerResourceQuotaUpdateIntervalMinutes15
    loadBalancerBrokerComfortLoadLevelPercentage65
    loadBalancerAutoBundleSplitEnabledfalse
    loadBalancerNamespaceBundleMaxTopics1000
    loadBalancerNamespaceBundleMaxSessions1000
    loadBalancerNamespaceBundleMaxMsgRate1000
    loadBalancerNamespaceBundleMaxBandwidthMbytes100
    loadBalancerNamespaceMaximumBundles128
    replicationMetricsEnabledtrue
    replicationConnectionsPerBroker16
    replicationProducerQueueSize1000
    defaultRetentionTimeInMinutes0
    defaultRetentionSizeInMB0
    keepAliveIntervalSeconds30

    WebSocket​

    NameDescriptionDefault
    configurationStoreServers
    zooKeeperSessionTimeoutMillis30000
    zooKeeperCacheExpirySecondsZooKeeper cache expiry time in seconds300
    serviceUrl
    serviceUrlTls
    brokerServiceUrl
    brokerServiceUrlTls
    webServicePort8080
    webServicePortTls8443
    bindAddress0.0.0.0
    clusterName
    authenticationEnabledfalse
    authenticationProviders
    authorizationEnabledfalse
    superUserRoles
    brokerClientAuthenticationPlugin
    brokerClientAuthenticationParameters
    tlsEnabledfalse
    tlsAllowInsecureConnectionfalse
    tlsCertificateFilePath
    tlsKeyFilePath
    tlsTrustCertsFilePath

    Pulsar proxy​

    The Pulsar proxy can be configured in the conf/proxy.conf file.

    NameDescriptionDefault
    zookeeperServersThe ZooKeeper quorum connection string (as a comma-separated list)
    configurationStoreServersConfiguration store connection string (as a comma-separated list)
    zookeeperSessionTimeoutMsZooKeeper session timeout (in milliseconds)30000
    zooKeeperCacheExpirySecondsZooKeeper cache expiry time in seconds300
    servicePortThe port to use for server binary Protobuf requests6650
    servicePortTlsThe port to use to server binary Protobuf TLS requests6651
    statusFilePathPath for the file used to determine the rotation status for the proxy instance when responding to service discovery health checks
    advertisedAddressHostname or IP address the service advertises to the outside world.InetAddress.getLocalHost().getHostname()
    authenticationEnabledWhether authentication is enabled for the Pulsar proxyfalse
    authenticateMetricsEndpointWhether the '/metrics' endpoint requires authentication. Defaults to true. 'authenticationEnabled' must also be set for this to take effect.true
    authenticationProvidersAuthentication provider name list (a comma-separated list of class names)
    authorizationEnabledWhether authorization is enforced by the Pulsar proxyfalse
    authorizationProviderAuthorization provider as a fully qualified class nameorg.apache.pulsar.broker.authorization.PulsarAuthorizationProvider
    brokerClientAuthenticationPluginThe authentication plugin used by the Pulsar proxy to authenticate with Pulsar brokers
    brokerClientAuthenticationParametersThe authentication parameters used by the Pulsar proxy to authenticate with Pulsar brokers
    brokerClientTrustCertsFilePathThe path to trusted certificates used by the Pulsar proxy to authenticate with Pulsar brokers
    superUserRolesRole names that are treated as "super-users," meaning that they will be able to perform all admin
    forwardAuthorizationCredentialsWhether client authorization credentials are forwarded to the broker for re-authorization. Authentication must be enabled via authenticationEnabled=true for this to take effect.false
    maxConcurrentInboundConnectionsMax concurrent inbound connections. The proxy will reject requests beyond that.10000
    maxConcurrentLookupRequestsMax concurrent outbound connections. The proxy will error out requests beyond that.50000
    tlsEnabledInProxyWhether TLS is enabled for the proxyfalse
    tlsEnabledWithBrokerWhether TLS is enabled when communicating with Pulsar brokersfalse
    tlsCertificateFilePathPath for the TLS certificate file
    tlsKeyFilePathPath for the TLS private key file
    tlsTrustCertsFilePathPath for the trusted TLS certificate pem file
    tlsHostnameVerificationEnabledWhether the hostname is validated when the proxy creates a TLS connection with brokersfalse
    tlsRequireTrustedClientCertOnConnectWhether client certificates are required for TLS. Connections are rejected if the client certificate isn’t trusted.false
    tlsProtocolsSpecify the tls protocols the broker will use to negotiate during TLS Handshake. Multiple values can be specified, separated by commas. Example:- TLSv1.2, TLSv1.1, TLSv1
    tlsCiphersSpecify the tls cipher the broker will use to negotiate during TLS Handshake. Multiple values can be specified, separated by commas. Example:- TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
    tokenSecretKeyConfigure the secret key to be used to validate auth tokens. The key can be specified like: tokenSecretKey=data:;base64,xxxxxxxxx or tokenSecretKey=file:///my/secret.key
    tokenPublicKeyConfigure the public key to be used to validate auth tokens. The key can be specified like: tokenPublicKey=data:;base64,xxxxxxxxx or tokenPublicKey=file:///my/secret.key
    tokenPublicAlgConfigure the algorithm to be used to validate auth tokens. This can be any of the asymettric algorithms supported by Java JWT (https://github.com/jwtk/jjwt#signature-algorithms-keys)RS256
    tokenAuthClaimSpecify the token claim that will be used as the authentication "principal" or "role". The "subject" field will be used if this is left blank
    proxyLogLevelSet the Pulsar Proxy log level.
  • If the value is set to 0, no TCP channel information is logged.
  • If the value is set to 1, only the TCP channel information and command information (without message body) are parsed and logged.
  • If the value is set to 2, all TCP channel information, command information, and message body are parsed and logged.
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    ZooKeeper​

    ZooKeeper handles a broad range of essential configuration- and coordination-related tasks for Pulsar. The default configuration file for ZooKeeper is in the conf/zookeeper.conf file in your Pulsar installation. The following parameters are available:

    NameDescriptionDefault
    tickTimeThe tick is the basic unit of time in ZooKeeper, measured in milliseconds and used to regulate things like heartbeats and timeouts. tickTime is the length of a single tick.2000
    initLimitThe maximum time, in ticks, that the leader ZooKeeper server allows follower ZooKeeper servers to successfully connect and sync. The tick time is set in milliseconds using the tickTime parameter.10
    syncLimitThe maximum time, in ticks, that a follower ZooKeeper server is allowed to sync with other ZooKeeper servers. The tick time is set in milliseconds using the tickTime parameter.5
    dataDirThe location where ZooKeeper will store in-memory database snapshots as well as the transaction log of updates to the database.data/zookeeper
    clientPortThe port on which the ZooKeeper server will listen for connections.2181
    autopurge.snapRetainCountIn ZooKeeper, auto purge determines how many recent snapshots of the database stored in dataDir to retain within the time interval specified by autopurge.purgeInterval (while deleting the rest).3
    autopurge.purgeIntervalThe time interval, in hours, by which the ZooKeeper database purge task is triggered. Setting to a non-zero number will enable auto purge; setting to 0 will disable. Read this guide before enabling auto purge.1
    maxClientCnxnsThe maximum number of client connections. Increase this if you need to handle more ZooKeeper clients.60

    In addition to the parameters in the table above, configuring ZooKeeper for Pulsar involves adding a server.N line to the conf/zookeeper.conf file for each node in the ZooKeeper cluster, where N is the number of the ZooKeeper node. Here's an example for a three-node ZooKeeper cluster:


    server.1=zk1.us-west.example.com:2888:3888
    server.2=zk2.us-west.example.com:2888:3888
    server.3=zk3.us-west.example.com:2888:3888

    We strongly recommend consulting the ZooKeeper Administrator's Guide for a more thorough and comprehensive introduction to ZooKeeper configuration