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https://issues.apache.org/jira/browse/CASSANDRA-11350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15193983#comment-15193983
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Marcus Eriksson edited comment on CASSANDRA-11350 at 3/14/16 7:30 PM:
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max_sstable_age_days is left at 1000 years, if someone wants to get the exact
behaviour they had before they can change it back
With those settings you will do compaction in 1day-sized windows until they are
1 year old. But the thing is you will actually not do any compaction unless you
have to (like after repair etc) since the windows don't change, so keeping
max_sstable_age_days at 1 year is quite pointless.
Problem with max_sstable_age_days is that. If you bootstrap a new node for
example you can end up with a huge amount of sstables older than
max_sstable_age_days
was (Author: krummas):
max_sstable_age_days is left at 1000 years, if someone wants to get the exact
behaviour they had before
With those settings you will do compaction in 1day-sized windows until they are
1 year old. But the thing is you will actually not do any compaction unless you
have to (like after repair etc) since the windows don't change, so keeping
max_sstable_age_days at 1 year is quite pointless.
Problem with max_sstable_age_days is that. If you bootstrap a new node for
example you can end up with a huge amount of sstables older than
max_sstable_age_days
> Max_SSTable_Age isn't really deprecated in DTCS
> -----------------------------------------------
>
> Key: CASSANDRA-11350
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11350
> Project: Cassandra
> Issue Type: Bug
> Components: Compaction
> Environment: PROD
> Reporter: Anubhav Kale
> Priority: Minor
>
> Based on the comments in
> https://issues.apache.org/jira/browse/CASSANDRA-10280, and changes made to
> DateTieredCompactionStrategyOptions.java, the Max_SSTable_Age field is marked
> as deprecated.
> However, this is still used to filter the old SS Tables in
> DateTieredCompactionStrategy.java. Once those tables are filtered,
> Max_Window_Size is used to limit how back in time we can go (essentially how
> Max_SSTable_Age was used previously).
> So I am somewhat confused on the exact use of these two fields. Should
> Max_SSTable_Age be really removed and Max_Window_Size be used to filter old
> tables (in which case it should be set to 1 year as well) ?
> Currently, Max_SSTable_Age = 1 Year, and Max_Window_Size = 1 Day. What is the
> expected behavior with these settings ?
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