PD Configuration File

The PD configuration file supports more options than command-line parameters. You can find the default configuration file here.

This document only describes parameters that are not included in command-line parameters. Check here for the command line parameters.

lease

• The timeout of the PD Leader Key lease. After the timeout, the system re-elects a Leader.
• Default value: 3
• unit: second

tso-save-interval

• The interval for PD to allocate TSOs for persistent storage in etcd
• Default value: 3 seconds

initial-cluster-state

• The initial state of the cluster
• Default value: new

enable-prevote

• Enables or disables raft prevote
• Default value: true

quota-backend-bytes

• The storage size of the meta-information database, which is 2GB by default
• Default value: 2147483648

auto-compaction-mod

• The automatic compaction modes of the meta-information database
• Available options: periodic (by cycle) and revision (by version number).
• Default value: periodic

auto-compaction-retention

• The time interval for automatic compaction of the meta-information database when auto-compaction-retention is periodic. When the compaction mode is set to revision, this parameter indicates the version number for the automatic compaction.
• Default value: 1h

force-new-cluster

• Determines whether to force PD to start as a new cluster and modify the number of Raft members to 1
• Default value: false

tick-interval

• The tick period of etcd Raft
• Default value: 100ms

election-interval

• The timeout for the etcd leader election
• Default value: 3s

use-region-storage

• Enables or disables independent Region storage
• Default value: false

security

Configuration items related to security

cacert-path

• The path of the CA file
• Default value: ""

cert-path

• The path of the Privacy Enhanced Mail (PEM) file that contains the X509 certificate
• Default value: ""

key-path

• The path of the PEM file that contains the X509 key
• Default value: ""

log

Configuration items related to log

format

• The log format, which can be specified as "text", "json", or "console"
• Default value: text

disable-timestamp

• Whether to disable the automatically generated timestamp in the log
• Default value: false

log.file

Configuration items related to the log file

max-size

• The maximum size of a single log file. When this value is exceeded, the system automatically splits the log into several files.
• Default value: 300
• Unit: MiB
• Minimum value: 1

max-days

• The maximum number of days in which a log is kept
• Default value: 28
• Minimum value: 1

max-backups

• The maximum number of log files to keep
• Default value: 7
• Minimum value: 1

metric

Configuration items related to monitoring

interval

• The interval at which monitoring metric data is pushed to Prometheus
• Default value: 15s

schedule

Configuration items related to scheduling

max-merge-region-size

• Controls the size limit of Region Merge. When the Region size is greater than the specified value, PD does not merge the Region with the adjacent Regions.
• Default value: 20

max-merge-region-keys

• Specifies the upper limit of the Region Merge key. When the Region key is greater than the specified value, the PD does not merge the Region with its adjacent Regions.
• Default value: 200000

patrol-region-interval

• Controls the running frequency at which replicaChecker checks the health state of a Region. The smaller this value is, the faster replicaChecker runs. Normally, you do not need to adjust this parameter.
• Default value: 100ms

split-merge-interval

• Controls the time interval between the split and merge operations on the same Region. That means a newly split Region will not be merged for a while.
• Default value: 1h

max-snapshot-count

• Control the maximum number of snapshots that a single store receives or sends at the same time. PD schedulers depend on this configuration to prevent the resources used for normal traffic from being preempted.
• Default value value: 3

max-pending-peer-count

• Controls the maximum number of pending peers in a single store. PD schedulers depend on this configuration to prevent too many Regions with outdated logs from being generated on some nodes.
• Default value: 16

max-store-down-time

• The downtime after which PD judges that the disconnected store can not be recovered. When PD fails to receive the heartbeat from a store after the specified period of time, it adds replicas at other nodes.
• Default value: 30m

leader-schedule-limit

• The number of Leader scheduling tasks performed at the same time
• Default value: 4

region-schedule-limit

• The number of Region scheduling tasks performed at the same time
• Default value: 4

replica-schedule-limit

• The number of Replica scheduling tasks performed at the same time
• Default value: 8

merge-schedule-limit

• The number of the Region Merge scheduling tasks performed at the same time. Set this parameter to 0 to disable Region Merge.
• Default value: 8

high-space-ratio

• The threshold ratio below which the capacity of the store is sufficient
• Default value: 0.6
• Minimum value: greater than 0
• Maximum value: less than 1

low-space-ratio

• The threshold ratio above which the capacity of the store is insufficient
• Default value: 0.8
• Minimum value: greater than 0
• Maximum value: less than 1

tolerant-size-ratio

• Controls the balance buffer size
• Default value: 5
• Minimum value: 0

disable-remove-down-replica

• Determines whether to disable the feature that automatically removes DownReplica. When this parameter is set to true, PD does not automatically clean up the copy in the down state.
• Default value: false

disable-replace-offline-replica

• Determines whether to disable the feature that migrates OfflineReplica. When this parameter is set to true, PD does not migrate the replicas in the offline state.
• Default value: false

disable-make-up-replica

• Determines whether to disable the feature that automatically supplements replicas. When this parameter is set to true, PD does not supplement replicas for the Region with insufficient replicas.
• Default value: false

disable-remove-extra-replica

• Determines whether to disable the feature that removes extra replicas. When this parameter is set to true, PD does not remove the extra replicas from the Region with excessive replicas.
• Default value: false

disable-location-replacement

• Determines whether to disable isolation level check. When this parameter is set to true, PD does not increase the isolation level of the Region replicas through scheduling.
• Default value: false

replication

Configuration items related to replicas

max-replicas

• The number of replicas
• Default value: 3

location-labels

• The topology information of a TiKV cluster
• Default value: []

label-property

Configuration items related to labels

key

• The label key for the store that rejected the Leader
• Default value: ""

value

• The label value for the store that rejected the Leader
• Default value: ""