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Posted to commits@cassandra.apache.org by "Brandon Williams (Jira)" <ji...@apache.org> on 2021/10/05 21:34:00 UTC
[jira] [Comment Edited] (CASSANDRA-16839) Truncation snapshots
unnecessarily created on node startup
[ https://issues.apache.org/jira/browse/CASSANDRA-16839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17424710#comment-17424710 ]
Brandon Williams edited comment on CASSANDRA-16839 at 10/5/21, 9:33 PM:
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This is caused by CASSANDRA-15776 truncating these tables via CQL, which does not have a mechanism for truncation without snapshotting. Instead if we don't use CQL we can invoke ColumnFamilyStore.discardSSTables.
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was (Author: brandon.williams):
This is caused by CASSANDRA-15776 truncating these tables via CQL, which does not have a mechanism for truncation without snapshotting. Instead if we don't use CQL we can invoke ColumnFamilyStore.discardSSTables.
||Branch||CI||
|[4.0|https://github.com/driftx/cassandra/tree/CASSANDRA-16839-4.0]|[circle|https://app.circleci.com/pipelines/github/driftx/cassandra?branch=CASSANDRA-16839-4.0],[!https://ci-cassandra.apache.org/job/Cassandra-devbranch/1176/badge/icon!|https://ci-cassandra.apache.org/blue/organizations/jenkins/Cassandra-devbranch/detail/Cassandra-devbranch/1176/pipeline]|
|[trunk|https://github.com/driftx/cassandra/tree/CASSANDRA-16839-trunk]|[circle|https://app.circleci.com/pipelines/github/driftx/cassandra?branch=CASSANDRA-16839-trunk],[!https://ci-cassandra.apache.org/job/Cassandra-devbranch/1177/badge/icon!|https://ci-cassandra.apache.org/blue/organizations/jenkins/Cassandra-devbranch/detail/Cassandra-devbranch/1177/pipeline]|
> Truncation snapshots unnecessarily created on node startup
> ----------------------------------------------------------
>
> Key: CASSANDRA-16839
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16839
> Project: Cassandra
> Issue Type: Bug
> Components: Tool/nodetool
> Reporter: Paulo Motta
> Assignee: Brandon Williams
> Priority: Normal
> Fix For: 4.0.x
>
>
> When testing cassandra 4.0 on ccm I noticed that everytime I restart a node, truncation snapshots are created for the tables {{system.table_estimates}} and {{system.size_estimates}}:
> {noformat}
> $ ccm create -n 1 test -s
> $ ccm node1 stop
> $ ccm node1 start
> $ ccm node1 stop
> $ ccm node1 start
> $ ccm node1 nodetool listsnapshots
> Snapshot Details:
> Snapshot name Keyspace name Column family name True size Size on disk
> truncated-1628599001857-table_estimates system table_estimates 0 bytes 13 bytes
> truncated-1628599099560-table_estimates system table_estimates 0 bytes 13 bytes
> truncated-1628599001736-size_estimates system size_estimates 0 bytes 13 bytes
> truncated-1628599057438-table_estimates system table_estimates 6.16 KiB 6.19 KiB
> truncated-1628599099458-size_estimates system size_estimates 0 bytes 13 bytes
> truncated-1628599057340-size_estimates system size_estimates 5.73 KiB 5.76 KiB
> Total TrueDiskSpaceUsed: 0 bytes
> {noformat}
> Not sure if this is expected behavior, but feels like a bug to me.
> Reproduced on 4.0, not sure if it reproduces on lower versions.
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