Re: Large single raid and XFS or two small ones and EXT3?

[Adam Talbot <talbotx@comcast.net>]

Trying to test for tuning with different chunk's.  Just finished 16K
chunk and am about 20% done with the 32K test.  Here are the numbers on
16K chunk, will send 32, 96,128,192 and 256 as I get them.  But keep in
mind each one of these tests take about 4~6 hours, so it is a slow
process...  I have settled for XFS as the file system type, it seems to
be able to beat any thing else out there.
-Adam

XFS
Config=NAS+NFS
RAID6 16K chunk
nas tmp # time tar cf - . | (cd /data ; tar xf - )
real    252m40.143s
user    1m4.720s
sys     25m6.270s
/dev/md/0             1.1T  371G  748G  34% /data
4.207 hours @ 90,167M/hour or 1502M/min  or 25.05M/sec




David Greaves wrote:
> Adam Talbot wrote:
>   
>> OK, this topic I relay need to get in on.
>> I have spent the last few week bench marking my new 1.2TB, 6 disk, RAID6
>> array.
>>     
> Very interesting. Thanks.
>
> Did you get around to any 'tuning'.
> Things like raid chunk size, external logs for xfs, blockdev readahead
> on the underlying devices and the raid device?
>
> David
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