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Date: Mon, 3 Mar 2014 14:22:59 +0800
From: Chengwei Yang <chengwei.yang.cn@gmail.com>
To: shashwat shriparv <dwivedishashwat@gmail.com>
Cc: user <user@hadoop.apache.org>, chengwei.yang.cn@gmail.com
Subject: Re: Need help to understand hadoop.tmp.dir
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On Mon, Mar 03, 2014 at 11:25:59AM +0530, shashwat shriparv wrote:
> You can use any directory you like beside permissions are right.

I mean if it's better if we change the default hadoop.tmp.dir? Because it
can not work cross reboot in default Linux environment.

--
Thanks,
Chengwei

> 
> 
> Warm Regards_∞_
> Shashwat Shriparv
> http://www.linkedin.com/pub/shashwat-shriparv/19/214/2a9https://twitter.com/
> shriparvhttps://www.facebook.com/shriparvhttp://google.com/+ShashwatShriparv
> http://www.youtube.com/user/sShriparv/videoshttp://profile.yahoo.com/
> SWXSTW3DVSDTF2HHSRM47AV6DI/
> 
> 
> 
> On Mon, Mar 3, 2014 at 11:07 AM, Chengwei Yang <chengwei.yang.cn@gmail.com>
> wrote:
> 
>     Hi List,
> 
>     I'm confusing by hadoop.tmp.dir currently because its default value
>     "/tmp/hadoop-${user.name}" always means a directory in tmpfs in Linux.
>     So after the name node machine reboot, it gone away and then name node
>     fail to start.
> 
>     I found this was reported here.
>     http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-user/201205.mbox/
>     %3CBAY148-W22BF95C5FBE2C40BF7CD9F86020@phx.gbl%3E
> 
>     As I found from http://hadoop.apache.org/docs/r2.3.0/, there are a lot
>     properties are based on hadoop.tmp.dir, like
>     dfs.namenode.name.dir   file://${hadoop.tmp.dir}/dfs/name
> 
>     I'm wondering, if we can set the default value of hadoop.tmp.dir to
>     a non-tmpfs direcotry if it doesn't work at all by using a real tmpfs
>     directory?
> 
>     --
>     Thanks,
>     Chengwei
> 
>