On Thu, 23 Dec 2010, Emmanuel Florac wrote:
Le Wed, 22 Dec 2010 13:03:13 -0600 vous écriviez:http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for_.3Csomething.3E which mentions getting your geometry right if it's hardware raid that can't be detected automatically.Just as a side note : I tried several times to manually set the filesystem layout to precisely match the underlying hardware RAID with sunit and swidth but didn't find that it made a noticeable difference. On my 39.9 TB systems, the default agcount is 39, while the optimum would be (theorically at least) 42. -- ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | <eflorac@xxxxxxxxxxxxxx> | +33 1 78 94 84 02 ------------------------------------------------------------------------
Hi, I concur, for hardware raid (at least on 3ware cards) I have found it makes no difference, thanks for confirming.
Which RAID cards did you use? Justin.
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