[jira] [Comment Edited] (CASSANDRA-8897) Remove FileCacheService, instead pooling the buffers

["Stefania (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-8897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533732#comment-14533732 ] 

Stefania edited comment on CASSANDRA-8897 at 5/8/15 3:03 AM:
-------------------------------------------------------------

Since CompressedPoolingSegmentedFile is gone we will need a sure way to retest CASSANDRA-9240.

The results just after a rebase are not that good:

{code}
Mean latency (one none running in foreground with -Xms500M -Xmx500M -Xmn50M, inserting 200k and reading back 50k):

TRUNK insert 7.2
TRUNK read 8.7
TRUNK read after restart 16.4

8897 insert 6.8
8897 read 16.6
8897 read after restart 22.3
{code}



was (Author: stefania):
Since CompressedPoolingSegmentedFile is gone we will need a sure way to retest CASSANDRA-9240.



> Remove FileCacheService, instead pooling the buffers
> ----------------------------------------------------
>
>                 Key: CASSANDRA-8897
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8897
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Benedict
>            Assignee: Stefania
>             Fix For: 3.x
>
>
> After CASSANDRA-8893, a RAR will be a very lightweight object and will not need caching, so we can eliminate this cache entirely. Instead we should have a pool of buffers that are page-aligned.



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