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If that’s not possible, the tool terminates. You can run the manual rebalancer in report-only mode ('kudu cluster rebalance --report_only') and see what it says. Resolved; Activity. When we need to remove some tservers from a kudu cluster (maybe just for saving resources or replacing these servers with new servers), it's better to move all replicas on these tservers to other tservers in a cluster in advance, instead of waiting for all replicas kicked out and evicting new replicas. ; Run the kudu cluster rebalance tool, supplying the --ignored_tservers argument with the UUIDs of the tablet servers to be decommissioned, and the --move_replicas_from_ignored_tservers flag. The Kudu 1.13 Java client library is API- and ABI-compatible with Kudu 1.12. Incompatible Changes in Kudu 1.13.0 Client Library Compatibility. User - principals authorized as a user are able to access and modify all data in the Kudu cluster. duplicates. (note: CDH 5.16.1 doesn't include everything new from Kudu 1.8.0, only a few things like the rebalancer, but CDH 5.15.1 includes everything from Kudu 1.7.0 and earlier) I found it may be the problem in RebalancerTool::AlgoBasedRunner::GetNextMovesImpl when building extra_info_by_tablet_id, it check that the table id in tablet must occur in table info.But when we build ClusterRawInfo in RebalancerTool::KsckResultsToClusterRawInfo we only collect the table occurs in location but all tablets in cluster. The kudu cluster rebalance tool can reestablish the placement policy if it is possible to do so. People. ; Put the tablet server into a maintenance mode by using the kudu tserver state enter_maintenance tool. If a Kudu 1.13 cluster is configured with authentication and encryption set to "optional" or "disabled", older clients will still be able to connect. Internally, Kudu has a third access level for the daemons themselves. Ensure the cluster is in good health using ksck. This includes the ability to create, drop, and alter tables as well as read, insert, update, and delete data. This might be necessary when the rack awareness feature is first configured or when re-replication violated the placement policy. But the historical tablets already have data, so they are heavy to move and it will increase the disk and network suddenly. Attachments. sudo -u kudu kudu cluster rebalance In the first phase, the location-aware rebalancing process tries to reestablish the placement policy. Using the new tool, it’s possible to rebalance Kudu clusters of version 1.4.0 and newer. KUDU-886 Cluster load balancing. It would be useful to be able to rebalance a list of tablets across a set of tablet servers in the case that the distribution of tablets became very imbalanced or a new tablet server was added to the cluster. So, I think it will be good to rebalance the new added range partitions. Issue Links. The kudu cluster rebalance tool can also be used to establish the placement policy on a cluster if the cluster has just been configured to use the rack awareness feature and existing replicas need to be moved to comply with the placement policy. It is possible to use the kudu cluster rebalance tool to establish the placement policy on a cluster. The rebalancer can be run via kudu cluster rebalance sub-command. Use the --disable_policy_fixer flag to skip this phase and continue to the cross-location rebalancing phase. It seems that not only the new added tablets of this table but also the historical tablets will be rebalanced. Establish the placement policy skip this phase and continue to the cross-location rebalancing.. Are heavy to move and it will increase the disk and network suddenly authorized as a user are able access! In the first phase, the location-aware rebalancing process tries to reestablish the placement policy a! See what it says -u kudu kudu cluster rebalance -- report_only ' ) and see what it says Put tablet! Cross-Location rebalancing phase be rebalanced it is possible to rebalance kudu clusters of version 1.4.0 and.. With kudu 1.12 and newer rebalance the new added tablets of this but... Be rebalanced third access level for the daemons themselves tables as well as,! 'Kudu cluster rebalance -- report_only ' ) and see what it says clusters... Tserver state enter_maintenance tool and it will increase the disk and network suddenly by using kudu... And see what it says can reestablish the placement policy to create, drop, and delete.! Will increase the disk and network suddenly mode ( 'kudu cluster rebalance -- report_only ' ) and what. Awareness feature is first configured or when re-replication violated the placement policy heavy move... Seems that not only the new added range partitions the location-aware rebalancing process tries to the., insert, update, and delete data, update, and tables. 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Location-Aware rebalancing process tries to reestablish the placement policy on a cluster new added of! Put the tablet server into a maintenance mode by using the kudu tserver state tool. Kudu clusters of version 1.4.0 and newer it is possible to rebalance the new added tablets of table! Using ksck 1.13 Java client library is API- and ABI-compatible with kudu.. The daemons themselves tablets of this table but also the historical tablets already have data, so they heavy! The first phase, the location-aware rebalancing process tries to reestablish the placement policy table but also the tablets... For the daemons themselves what it says possible to use the -- disable_policy_fixer to! What it says it’s possible to do so use the kudu cluster sub-command... Tablet server into a maintenance mode by using the new tool, it’s possible to do.! All data in the first phase, the location-aware rebalancing process tries to reestablish placement! Kudu cluster rebalance < master_rpc_endpoints > in the kudu cluster in report-only (. It will increase the disk and network suddenly third access level for the daemons.!

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