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From "Hari Krishna Dara (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-13124) Option to collect latencies for individual requests
Date Fri, 27 Feb 2015 07:31:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-13124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Hari Krishna Dara updated HBASE-13124:
    Attachment: HBASE-13124-1.patch

Patch adds {{--responseFile}} to turn on writing this data out to the specified file. By default
this only write a summary line every few milliseconds, but with {{--detailedResponse}} option,
it writes every single response.

> Option to collect latencies for individual requests
> ---------------------------------------------------
>                 Key: HBASE-13124
>                 URL: https://issues.apache.org/jira/browse/HBASE-13124
>             Project: HBase
>          Issue Type: Improvement
>          Components: Performance, test
>    Affects Versions: 0.98.6
>            Reporter: Hari Krishna Dara
>         Attachments: HBASE-13124-1.patch
> Currently, the only option in {{PerformanceEvaluation}} is to print latency percentile
summary at the end, and it is also not suitable if we are testing for a long duration (as
all the timings are collected in memory). There should be an option to dump the latencies
with a timestamp as CSV to a file so that this allows a detailed analysis on the generated
data, such as:
> - Percentile calculation at the desired precision on the latencies 
> - Latencies over time
> - Histograms

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