xfs mount/create options (was: XFS status update for August 2010)
michael.monnerie at is.it-management.at
Wed Sep 8 00:38:54 CDT 2010
I just found that my questions from Monday were not solved, but this is
interesting, so I want to warm it up again.
On Montag, 6. September 2010 Michael Monnerie wrote:
I looked into man mkfs now, which brings up these questions:
On Sonntag, 5. September 2010 Dave Chinner wrote:
> - relatime,logbufs=8,attr=2,barrier are all defaults.
Why isn't logbsize=256k default, when it's suggested most of the time
anyway? On machines with 32MiB or more 32k is the default, but most
machines these days have multi-gigabytes of RAM, so at least for
RAM>1GiB that could be made default.
> - largeio only affects stat(2) output if you have
> sunit/swidth set - unlikely on a laptop drive, and has
> no effect on unlink performance.
> - swalloc only affects allocation if sunit/swidth are set
> and has no effect on unlink performance.
Hm, it seems I don't understand that. I tried now on different
stat -f /disks/db --format '%s %S'
That filesystems were all created with su=64k,swidth=(values 4-8
depending on RAID). So I retried specifying directly in the mount
and it still reports "4096" for %s - or is %s not the value I should
look for? Some of the filesystems even have allocsize= specified,
still always 4096 is given back. Where is my problem?
And while I am at it: Why does "mount" not provide the su=/sw=
options that we can use to create a filesystem? Would make life
easier, as it's much easier to read su=64k,sw=7 than
When I defined su/sw on mkfs, is it enough, or would I always have to
specify sunit/swidth with every mount too?
mit freundlichen Grüssen,
Michael Monnerie, Ing. BSc
it-management Internet Services
http://proteger.at [gesprochen: Prot-e-schee]
Tel: 0660 / 415 65 31
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