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From shashwat shriparv <dwivedishash...@gmail.com>
Subject Re: Need help to understand hadoop.tmp.dir
Date Mon, 03 Mar 2014 05:55:59 GMT
You can use any directory you like beside permissions are right.


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* Shashwat Shriparv*
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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
>

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