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Posted to commits@cassandra.apache.org by "Marcus Eriksson (JIRA)" <ji...@apache.org> on 2014/05/11 00:11:00 UTC
[jira] [Assigned] (CASSANDRA-6563) TTL histogram compactions not
triggered at high "Estimated droppable tombstones" rate
[ https://issues.apache.org/jira/browse/CASSANDRA-6563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marcus Eriksson reassigned CASSANDRA-6563:
------------------------------------------
Assignee: Paulo Ricardo Motta Gomes
> TTL histogram compactions not triggered at high "Estimated droppable tombstones" rate
> -------------------------------------------------------------------------------------
>
> Key: CASSANDRA-6563
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6563
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: 1.2.12ish
> Reporter: Chris Burroughs
> Assignee: Paulo Ricardo Motta Gomes
> Fix For: 1.2.17, 2.0.8
>
> Attachments: 1.2.16-CASSANDRA-6563.txt, 2.0.7-CASSANDRA-6563.txt, patched-droppadble-ratio.png, patched-storage-load.png, unpatched-droppable-ratio.png, unpatched-storage-load.png
>
>
> I have several column families in a largish cluster where virtually all columns are written with a (usually the same) TTL. My understanding of CASSANDRA-3442 is that sstables that have a high ( > 20%) estimated percentage of droppable tombstones should be individually compacted. This does not appear to be occurring with size tired compaction.
> Example from one node:
> {noformat}
> $ ll /data/sstables/data/ks/Cf/*Data.db
> -rw-rw-r-- 31 cassandra cassandra 26651211757 Nov 26 22:59 /data/sstables/data/ks/Cf/ks-Cf-ic-295562-Data.db
> -rw-rw-r-- 31 cassandra cassandra 6272641818 Nov 27 02:51 /data/sstables/data/ks/Cf/ks-Cf-ic-296121-Data.db
> -rw-rw-r-- 31 cassandra cassandra 1814691996 Dec 4 21:50 /data/sstables/data/ks/Cf/ks-Cf-ic-320449-Data.db
> -rw-rw-r-- 30 cassandra cassandra 10909061157 Dec 11 17:31 /data/sstables/data/ks/Cf/ks-Cf-ic-340318-Data.db
> -rw-rw-r-- 29 cassandra cassandra 459508942 Dec 12 10:37 /data/sstables/data/ks/Cf/ks-Cf-ic-342259-Data.db
> -rw-rw-r-- 1 cassandra cassandra 336908 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342307-Data.db
> -rw-rw-r-- 1 cassandra cassandra 2063935 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342309-Data.db
> -rw-rw-r-- 1 cassandra cassandra 409 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342314-Data.db
> -rw-rw-r-- 1 cassandra cassandra 31180007 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342319-Data.db
> -rw-rw-r-- 1 cassandra cassandra 2398345 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342322-Data.db
> -rw-rw-r-- 1 cassandra cassandra 21095 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342331-Data.db
> -rw-rw-r-- 1 cassandra cassandra 81454 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342335-Data.db
> -rw-rw-r-- 1 cassandra cassandra 1063718 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342339-Data.db
> -rw-rw-r-- 1 cassandra cassandra 127004 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342344-Data.db
> -rw-rw-r-- 1 cassandra cassandra 146785 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342346-Data.db
> -rw-rw-r-- 1 cassandra cassandra 697338 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342351-Data.db
> -rw-rw-r-- 1 cassandra cassandra 3921428 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342367-Data.db
> -rw-rw-r-- 1 cassandra cassandra 240332 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342370-Data.db
> -rw-rw-r-- 1 cassandra cassandra 45669 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342374-Data.db
> -rw-rw-r-- 1 cassandra cassandra 53127549 Dec 12 12:03 /data/sstables/data/ks/Cf/ks-Cf-ic-342375-Data.db
> -rw-rw-r-- 16 cassandra cassandra 12466853166 Dec 25 22:40 /data/sstables/data/ks/Cf/ks-Cf-ic-396473-Data.db
> -rw-rw-r-- 12 cassandra cassandra 3903237198 Dec 29 19:42 /data/sstables/data/ks/Cf/ks-Cf-ic-408926-Data.db
> -rw-rw-r-- 7 cassandra cassandra 3692260987 Jan 3 08:25 /data/sstables/data/ks/Cf/ks-Cf-ic-427733-Data.db
> -rw-rw-r-- 4 cassandra cassandra 3971403602 Jan 6 20:50 /data/sstables/data/ks/Cf/ks-Cf-ic-437537-Data.db
> -rw-rw-r-- 3 cassandra cassandra 1007832224 Jan 7 15:19 /data/sstables/data/ks/Cf/ks-Cf-ic-440331-Data.db
> -rw-rw-r-- 2 cassandra cassandra 896132537 Jan 8 11:05 /data/sstables/data/ks/Cf/ks-Cf-ic-447740-Data.db
> -rw-rw-r-- 1 cassandra cassandra 963039096 Jan 9 04:59 /data/sstables/data/ks/Cf/ks-Cf-ic-449425-Data.db
> -rw-rw-r-- 1 cassandra cassandra 232168351 Jan 9 10:14 /data/sstables/data/ks/Cf/ks-Cf-ic-450287-Data.db
> -rw-rw-r-- 1 cassandra cassandra 73126319 Jan 9 11:28 /data/sstables/data/ks/Cf/ks-Cf-ic-450307-Data.db
> -rw-rw-r-- 1 cassandra cassandra 40921916 Jan 9 12:08 /data/sstables/data/ks/Cf/ks-Cf-ic-450336-Data.db
> -rw-rw-r-- 1 cassandra cassandra 60881193 Jan 9 12:23 /data/sstables/data/ks/Cf/ks-Cf-ic-450341-Data.db
> -rw-rw-r-- 1 cassandra cassandra 4746 Jan 9 12:23 /data/sstables/data/ks/Cf/ks-Cf-ic-450350-Data.db
> -rw-rw-r-- 1 cassandra cassandra 5769 Jan 9 12:23 /data/sstables/data/ks/Cf/ks-Cf-ic-450352-Data.db
> {noformat}
> {noformat}
> 295562: Estimated droppable tombstones: 0.899035828535183
> 296121: Estimated droppable tombstones: 0.9135080937806197
> 320449: Estimated droppable tombstones: 0.8916766879896414
> {noformat}
> I've checked in on this example node several times and compactionstats has not shown any other activity that would be blocking the tombstone based compaction. The TTL is in the 15-20 day range so an sstable from November should have had ample opportunities by January.
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