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Date: Wed, 1 May 2013 02:27:13 +0000 (UTC)
From: "T Jake Luciani (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12645571.1367370840896.252782.1367375233272@arcas>
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Subject: [jira] [Commented] (CASSANDRA-5530) Switch from THSHAServer to
 TThreadedSelectorServer
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    [ https://issues.apache.org/jira/browse/CASSANDRA-5530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13646315#comment-13646315 ] 

T Jake Luciani commented on CASSANDRA-5530:
-------------------------------------------

Well it's still HSHA, just the HA is not single threaded...
                
> Switch from THSHAServer to TThreadedSelectorServer
> --------------------------------------------------
>
>                 Key: CASSANDRA-5530
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5530
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: T Jake Luciani
>            Assignee: T Jake Luciani
>             Fix For: 2.0
>
>         Attachments: 5530.txt
>
>
> TThreadedSelectorServer is new in Thrift 0.9.  It builds on HSHA by allowing for a set of threads for IO and a set work request processing...
> I've attached the performance numbers below. It's a lot closer to TThreadedServer.
> ThreadedServer (Default)
> {code}
> Write Averages from the middle 80% of values:
> interval_op_rate          : 14811
> interval_key_rate         : 14811
> latency median            : 1.7
> latency 95th percentile   : 5.3
> latency 99.9th percentile : 142.6
> Total operation time      : 00:01:16
> END
> Read Averages from the middle 80% of values:
> interval_op_rate          : 16898
> interval_key_rate         : 16898
> latency median            : 2.2
> latency 95th percentile   : 8.5
> latency 99.9th percentile : 165.7
> Total operation time      : 00:01:05
> END
> {code}
> HSHA (CURRENT)
> {code}
> Write Averages from the middle 80% of values:
> interval_op_rate          : 8939
> interval_key_rate         : 8939
> latency median            : 5.0
> latency 95th percentile   : 10.1
> latency 99.9th percentile : 105.4
> Total operation time      : 00:01:56
> END
> Read Averages from the middle 80% of values:
> interval_op_rate          : 9608
> interval_key_rate         : 9608
> latency median            : 5.1
> latency 95th percentile   : 7.7
> latency 99.9th percentile : 51.6
> Total operation time      : 00:01:49
> END
> {code}
> TThreadedSelectorServer (NEW)
> {code}
> Write Averages from the middle 80% of values:
> interval_op_rate          : 11640
> interval_key_rate         : 11640
> latency median            : 3.1
> latency 95th percentile   : 10.6
> latency 99.9th percentile : 135.9
> Total operation time      : 00:01:30
> END
> Read Averages from the middle 80% of values:
> interval_op_rate          : 15247
> interval_key_rate         : 15247
> latency median            : 2.8
> latency 95th percentile   : 7.1
> latency 99.9th percentile : 40.3
> Total operation time      : 00:01:06
> END
> {code}

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