Re: xfssyncd and disk spin down

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Stan Hoeppner put forth on 12/23/2010 6:54 PM:

> http://www.mjmwired.net/kernel/Documentation/filesystems/xfs.txt
> 
> fs.xfs.xfssyncd_centisecs	(Min: 100  Default: 3000  Max: 720000)
> 	The interval at which the xfssyncd thread flushes metadata
> 	out to disk.  This thread will flush log activity out, and
> 	do some processing on unlinked inodes.
>
> Maybe related or also worth mentioning:
> 
> fs.xfs.age_buffer_centisecs	(Min: 100  Default: 1500  Max: 720000)
> 	The age at which xfsbufd flushes dirty metadata buffers to disk.

These can be found in /proc/sys/fs/xfs and you'd simply

~$ echo 720000 > /proc/sys/fs/xfs/xfssyncd_centisecs

to get the maximum 12 minute interval.

-- 
Stan

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