Mailing-List: contact hadoop-dev-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hadoop-dev@lucene.apache.org
Message-ID: <1400377919.1141073266045.JavaMail.jira@ajax.apache.org>
Date: Mon, 27 Feb 2006 21:47:46 +0100 (CET)
From: "Tim Patton (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Commented: (HADOOP-33) DF enhancement: performance and win
 XP support
In-Reply-To: <922804577.1139611475063.JavaMail.jira@ajax.apache.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit

    [ http://issues.apache.org/jira/browse/HADOOP-33?page=comments#action_12368021 ] 

Tim Patton commented on HADOOP-33:
----------------------------------

Konstantin,

Thank you for submitting that patch, even though it wasn't accepted I just copied your tryOtherOS method into my code to get rid of that annoying Unix dependency.  I was suprised to see a dependency like that on an operating system command.  Frankly, as a developer and a user, a little extra code is a lot less annoying than several megs of Cygwin and a few hours getting it working (especially since it never worked right).

> DF enhancement: performance and win XP support
> ----------------------------------------------
>
>          Key: HADOOP-33
>          URL: http://issues.apache.org/jira/browse/HADOOP-33
>      Project: Hadoop
>         Type: Improvement
>   Components: fs, dfs
>  Environment: Unix, Cygwin, Win XP
>     Reporter: Konstantin Shvachko
>     Priority: Minor
>  Attachments: DF.patch, DFpatch.txt
>
> 1. DF is called twice for each heartbeat, which happens each 3 seconds.
> There is a simple fix for that in the attached patch.
> 2. cygwin is required to run df program in windows environment.
> There is a class org.apache.commons.io.FileSystemUtils, which can return disk free space
> for different OSs, but it does not have means to get disk capacity.
> In general in windows there is no efficient and uniform way to calculate disk capacity
> using a shell command.
> The choices are 'chkdsk' and 'defrag -a', but both of them are too slow to be called
> every 3 seconds.
> WinXP and 2003 server have a new tool called fsutil, which provides all necessary info.
> I implemented a call to fsutil in case df fails, and the OS is right.
> Other win versions should still run cygwin.
> I tested this fetaure for linux, winXP and cygwin.
> See attached patch.

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
   http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
   http://www.atlassian.com/software/jira