Controller

Most of the properties in Pinot are set in Zookeeper via Helix. However, you can also set properties in controller.conf file. You can specify the path to configuration file at the startup time as follows:

bin/pinot-admin.sh StartController -configFileName /path/to/controller.conf

Controller.conf can have the following properties.

Primary configuration

Property	Default	Description
controller.vip.host	same as controller.host	The VIP hostname used to set the download URL for segments
controller.vip.port	same as controller.port
controller.vip.protocol
controller.host	localhost	The ip of the host on which controller is running
controller.port	9000	The port on which controller should run
controller.access.protocol
controller.data.dir	${java.io.tmpdir}/PinotController	Directory to host segment data
controller.local.temp.dir
controller.zk.str	localhost:2181	zookeeper host:port string to connect
controller.update_segment_state_model	false
controller.helix.cluster.name		Pinot Cluster Name, required.
cluster.tenant.isolation.enable	true	Enable Tenant Isolation, default is single tenant cluster
controller.enable.split.commit	false
controller.query.console.useHttps	false	use https instead of http for cluster
controller.upload.onlineToOfflineTimeout	2 minutes
controller.mode	dual	Should be one of helix_only, pinot_only or dual
controller.resource.rebalance.strategy	org.apache.helix.controller. rebalancer.strategy.AutoRebalanceStrategy
controller.realtime.segment.commit.timeoutSeconds	120 seconds	request timeout for segment commit
controller.deleted.segments.retentionInDays	7 days	duration for which to retain deleted segments
controller.admin.access.control.factory.class	org.apache.pinot.controller. api.access.AllowAllAccessFactory
controller.segment.upload.timeoutInMillis	10 minutes	timeout for upload of segments.
controller.realtime.segment.metadata.commit.numLocks	64
controller.enable.storage.quota.check	true
controller.enable.batch.message.mode	false
controller.allow.hlc.tables	true
controller.storage.factory.class.file	org.apache.pinot.spi. filesystem.LocalPinotFS
table.minReplicas	1
controller.access.protocols	http	Ingress protocols to access controller (http or https or http,https)
controller.access.protocols.http.port		Port to access controller via http
controller.broker.protocols.https.port		Port to access controller via https
controller.broker.protocol	http	protocol for forwarding query requests (http or https)
controller.broker.port.override		override for broker port when forwarding query requests (use in multi-ingress scenarios)
controller.tls.keystore.path		Path to controller TLS keystore
controller.tls.keystore.password		keystore password
controller.tls.truststore.path		Path to controller TLS truststore
controller.tls.truststore.password		truststore password
controller.tls.client.auth	false	toggle for requiring TLS client auth
pinot.controller.http.server.thread.pool.corePoolSize	2 * cores	Config for the thread-pool used by pinot-controller's http-server.
pinot.controller.http.server.thread.pool.maxPoolSize	2 * cores	Config for the thread-pool used by pinot-controller's http-server.
pinot.controller.segment.fetcher.http.client.maxConnTotal		Config for the http-client used by HttpSegmentFetcher for downloading segments
pinot.controller.segment.fetcher.http.client.maxConnPerRoute		Config for the http-client used by HttpSegmentFetcher for downloading segments

Periodic task configuration

The following period tasks are

BrokerResourceValidationManager

This task rebuilds the BrokerResource if the instance set has changed.

Config	Default Value
controller.broker.resource.validation.frequencyPeriod	1h
controller.broker.resource.validation.initialDelayInSeconds	between 2m-5m

StaleInstancesCleanupTask

This task periodically cleans up stale Pinot broker/server/minion instances.

Config	Default Value
controller.stale.instances.cleanup.task.frequencyPeriod	1h
controller.stale.instances.cleanup.task.initialDelaySeconds	between 2m-5m
controller.stale.instances.cleanup.task.minOfflineTimeBeforeDeletionPeriod	1h

OfflineSegmentIntervalChecker

This task manages the segment ValidationMetrics (missingSegmentCount, offlineSegmentDelayHours, lastPushTimeDelayHours, TotalDocumentCount, NonConsumingPartitionCount, SegmentCount), to ensure that all offline segments are contiguous (no missing segments) and that the offline push delay isn't too high.

Config	Default Value
controller.offline.segment.interval.checker.frequencyPeriod	24h
controller.statuschecker.waitForPushTimePeriod	10m
controller.offlineSegmentIntervalChecker.initialDelayInSeconds	between 2m-5m

PinotTaskManager

TBD

RealtimeSegmentValidationManager

This task validates the ideal state and segment zk metadata of real-time tables by doing the following:

• fixing any partitions which have stopped consuming

• starting consumption from new partitions

• uploading segments to deep store if segment download url is missing

This task ensures that the consumption of the real-time tables gets fixed and keeps going when met with erroneous conditions.

This task does not fix consumption stalled due to

• CONSUMING segment being deleted

• Kafka OOR exceptions

Config	Default Value
controller.realtime.segment.validation.frequencyPeriod	1h
controller.realtime.segment.validation.initialDelayInSeconds	between 2m-5m
controller.realtime.segment.deepStoreUploadRetryEnabled	false
controller.realtime.segment.deepStoreUploadRetry.timeoutMs	-1
controller.realtime.segment.deepStoreUploadRetry.parallelism	1

RetentionManager

This task manages retention of segments for all tables. During the run, it looks at the retentionTimeUnit and retentionTimeValue inside the segmentsConfig of every table, and deletes segments which are older than the retention. The deleted segments are moved to a DeletedSegments folder colocated with the dataDir on segment store, and permanently deleted from that folder in a configurable number of days.

Config	Default Value
controller.retention.frequencyPeriod	6h
controller.retentionManager.initialDelayInSeconds	between 2m-5m
controller.deleted.segments.retentionInDays	7d

SegmentRelocator

This task is applicable only if you have tierConfig or tagOverrideConfig. It runs rebalance in the background to

1. relocate COMPLETED segments to tag overrides

2. relocate ONLINE segments to tiers if tier configs are set

At most one replica is allowed to be unavailable during rebalance.

Config	Default Value
controller.segment.relocator.frequencyPeriod	1h
controller.segmentRelocator.initialDelayInSeconds	between 2m-5m

SegmentStatusChecker

This task manages segment status metrics such as realtimeTableCount, offlineTableCount, disableTableCount, numberOfReplicas, percentOfReplicas, percentOfSegments, idealStateZnodeSize, idealStateZnodeByteSize, segmentCount, segmentsInErrorState, tableCompressedSize.

Config	Default Value
controller.statuschecker.frequencyPeriod	5m
controller.statusChecker.initialDelayInSeconds	between 2m-5m

RebalanceChecker

Currently, table rebalance triggered by user runs at best effort. It could fail if the controller running it got restarted; or some servers were not stable, making the rebalance timed out while waiting for external view to converge with ideal state, etc. This task checks for failed rebalance and retry them automatically, up to certain times as configured.

Config	Default Value
controller.rebalance.checker.frequencyPeriod	5m
controller.rebalanceChecker.initialDelayInSeconds	between 2m-5m

TaskMetricsEmitter

TBD