[
https://issues.apache.org/jira/browse/CASSANDRA-12366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15406166#comment-15406166
]
T Jake Luciani commented on CASSANDRA-12366:
--------------------------------------------
I pushed an update to fix the compression ratio calc. Also, I noticed the way
of calculating the size read was broken for leveled compactions since we
combine many sstables into the scanner. When a reader jumps from one sstable
to another there may be big jumps which don't reflect the actual read amount.
I also added this to cleanup, verify, gc compactions.
> Fix compaction throttle
> -----------------------
>
> Key: CASSANDRA-12366
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12366
> Project: Cassandra
> Issue Type: Bug
> Components: Compaction
> Reporter: T Jake Luciani
> Assignee: T Jake Luciani
> Fix For: 3.x
>
>
> Compaction throttling is broken in the following ways:
> * It throttles bytes read after being decompressed
> * Compaction creates multiple scanners which share the rate limiter causing
> too much throttling
> * It bears no resemblance to the reported compaction time remaining
> calculation (Bytes of source sstables processed since start of compaction)
> To fix this we need to simplify the throttling to be only at the
> CompactionIterator level.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
