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Posted to commits@cassandra.apache.org by "Paulo Motta (Jira)" <ji...@apache.org> on 2022/01/19 01:41:00 UTC
[jira] [Updated] (CASSANDRA-17267) Snapshot true size is miscalculated
[ https://issues.apache.org/jira/browse/CASSANDRA-17267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paulo Motta updated CASSANDRA-17267:
------------------------------------
Since Version: 3.11.11
Description:
As far as I understand, the snapshot "size on disk" is the total size of the snapshot, while the "true size" is the (size_on_disk - size_of_live_sstables).
I created a snapshot on a 3.11 node without traffic and I expected the "true size" to be 0KB since the original sstables were still present, but this didn't seem to be the case:
{noformat}
$ nodetool listsnapshots
Snapshot Details:
Snapshot name Keyspace name Column family name True size Size on disk
test ks1 tbl1 4.86 KiB 5.69 KiB
Total TrueDiskSpaceUsed: 4.86 KiB
{noformat}
was:
As far as I understand, the snapshot "size on disk" is the total size of the snapshot, while the "true size" is the (size_on_disk - size_of_live_sstables).
I created a snapshot on a cluster without traffic and I expected the "true size" to be 0KB since the original sstables were still present, but this didn't seem to be the case:
{noformat}
$ nodetool listsnapshots
Snapshot Details:
Snapshot name Keyspace name Column family name True size Size on disk
test ks1 tbl1 4.86 KiB 5.69 KiB
Total TrueDiskSpaceUsed: 4.86 KiB
{noformat}
> Snapshot true size is miscalculated
> -----------------------------------
>
> Key: CASSANDRA-17267
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17267
> Project: Cassandra
> Issue Type: Bug
> Reporter: Paulo Motta
> Assignee: Paulo Motta
> Priority: Normal
>
> As far as I understand, the snapshot "size on disk" is the total size of the snapshot, while the "true size" is the (size_on_disk - size_of_live_sstables).
> I created a snapshot on a 3.11 node without traffic and I expected the "true size" to be 0KB since the original sstables were still present, but this didn't seem to be the case:
> {noformat}
> $ nodetool listsnapshots
> Snapshot Details:
> Snapshot name Keyspace name Column family name True size Size on disk
> test ks1 tbl1 4.86 KiB 5.69 KiB
> Total TrueDiskSpaceUsed: 4.86 KiB
> {noformat}
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