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Posted to commits@cassandra.apache.org by "Marcus Eriksson (JIRA)" <ji...@apache.org> on 2015/11/20 09:40:11 UTC
[jira] [Comment Edited] (CASSANDRA-10280) Make DTCS work well with
old data
[ https://issues.apache.org/jira/browse/CASSANDRA-10280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15015419#comment-15015419 ]
Marcus Eriksson edited comment on CASSANDRA-10280 at 11/20/15 8:39 AM:
-----------------------------------------------------------------------
fixed the comments and also made sure the unit tests pass, test runs pending
||branch||testall||dtest||
|[marcuse/10280|https://github.com/krummas/cassandra/tree/marcuse-10280]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-dtest]|
|[marcuse/10280-2.2|https://github.com/krummas/cassandra/tree/marcuse-10280-2.2]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-2.2-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-2.2-dtest]|
|[marcuse/10280-3.0|https://github.com/krummas/cassandra/tree/marcuse-10280-3.0]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.0-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.0-dtest]|
|[marcuse/10280-3.1|https://github.com/krummas/cassandra/tree/marcuse-10280-3.1]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.1-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.1-dtest]|
|[marcuse/10280-trunk|https://github.com/krummas/cassandra/tree/marcuse-10280-trunk]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-trunk-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-trunk-dtest]|
was (Author: krummas):
fixed the comments and also made sure the unit tests pass, test runs pending
||branch||testall||dtest||
|[marcuse-10280|https://github.com/krummas/cassandra/tree/marcuse-10280]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-dtest]|
|[marcuse-10280-2.2|https://github.com/krummas/cassandra/tree/marcuse-10280-2.2]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-2.2-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-2.2-dtest]|
|[marcuse-10280-3.0|https://github.com/krummas/cassandra/tree/marcuse-10280-3.0]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.0-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.0-dtest]|
|[marcuse-10280-3.1|https://github.com/krummas/cassandra/tree/marcuse-10280-3.1]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.1-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-3.1-dtest]|
|[marcuse-10280-trunk|https://github.com/krummas/cassandra/tree/marcuse-10280-trunk]|[testall|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-trunk-testall]|[dtest|http://cassci.datastax.com/view/Dev/view/krummas/job/krummas-marcuse-10280-trunk-dtest]|
> Make DTCS work well with old data
> ---------------------------------
>
> Key: CASSANDRA-10280
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10280
> Project: Cassandra
> Issue Type: Sub-task
> Reporter: Marcus Eriksson
> Assignee: Marcus Eriksson
> Fix For: 2.1.x, 2.2.x, 3.x
>
>
> Operational tasks become incredibly expensive if you keep around a long timespan of data with DTCS - with default settings and 1 year of data, the oldest window covers about 180 days. Bootstrapping a node with vnodes with this data layout will force cassandra to compact very many sstables in this window.
> We should probably put a cap on how big the biggest windows can get. We could probably default this to something sane based on max_sstable_age (ie, say we can reasonably handle 1000 sstables per node, then we can calculate how big the windows should be to allow that)
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