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Posted to commits@cassandra.apache.org by "Jeremy Hanna (Jira)" <ji...@apache.org> on 2020/01/02 05:19:00 UTC
[jira] [Comment Edited] (CASSANDRA-13019) Improve clearsnapshot to
delete the snapshot files slowly
[ https://issues.apache.org/jira/browse/CASSANDRA-13019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17006592#comment-17006592 ]
Jeremy Hanna edited comment on CASSANDRA-13019 at 1/2/20 5:18 AM:
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I like the idea to reduce the effect on the regular server operations when performing the snapshot, especially if there is a coordinated snapshot across the cluster.
Because it may affect time it takes for operations that call {{snapshot}} indirectly, should we make a note of this in the NEWS.txt - both the availability of the throttle and that it may affect time to run things like {{truncate}} and {{drop}}?
was (Author: jeromatron):
I like the idea to reduce the effect on the regular server operations when performing the snapshot, especially if there is a coordinated snapshot across the cluster.
Because it may affect time it takes for operations that call `snapshot` indirectly, should we make a note of this in the NEWS.txt - both the availability of the throttle and that it may affect time to run things like `truncate` and `drop`?
> Improve clearsnapshot to delete the snapshot files slowly
> ----------------------------------------------------------
>
> Key: CASSANDRA-13019
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13019
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Core
> Reporter: Dikang Gu
> Assignee: Jeff Jirsa
> Priority: Normal
> Labels: pull-request-available
> Fix For: 4.x
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> In our environment, we are creating snapshots for backup, after we finish the backup, we are running {{clearsnapshot}} to delete the snapshot files. At that time we may have thousands of files to delete, and it's causing sudden disk usage spike. As a result, we are experiencing a spike of drop messages from Cassandra.
> I think we should implement something like {{slowrm}} to delete the snapshot files slowly, avoid the sudden disk usage spike.
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