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From "Taras Ledkov (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (IGNITE-3640) IGFS: Local secondary: Investigate whether we need BufferedInputStream for open operation.
Date Tue, 22 Nov 2016 15:01:07 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-3640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15686963#comment-15686963
] 

Taras Ledkov edited comment on IGNITE-3640 at 11/22/16 3:00 PM:
----------------------------------------------------------------

Here are results with our simple IgfsBenchmark:
Buffered read: *7048 +/- 125*
Not buffered read: *7150 +/- 127*

Look like the difference is less then dispersion. But the benchmark checks only serial read
file from begin to EOF.
May be if we check repeatable read with changing position inside the buffer the difference
will be more significant.

Should we check it?


was (Author: tledkov-gridgain):
Here are results with our simple IgfsBenchmark:
Buffered read: *7048 +/- 125*
Not buffered read: *7150 +/- 127*

Look like the the difference is less then dispersion. But the benchmark checks only serial
read file from begin to EOF.
May be if we check repeatable read with changing position inside the buffer the difference
will be more significant.

Should we check it?

> IGFS: Local secondary: Investigate whether we need BufferedInputStream for open operation.
> ------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-3640
>                 URL: https://issues.apache.org/jira/browse/IGNITE-3640
>             Project: Ignite
>          Issue Type: Task
>          Components: IGFS
>    Affects Versions: 1.6
>            Reporter: Vladimir Ozerov
>            Assignee: Taras Ledkov
>             Fix For: 2.0
>
>
> We need to accurately investigate IGFS input stream workflow. I have doubts we really
need to extend from {{BufferedInputStream}} here.



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