On 20-Oct-09, at 11:32, Doug Hunley wrote:
Is it safe to use tune2fs to alter stride and stripe_width on an ext4
fs once it has been created? Any caveats I should know about? Thanks
The stride is mostly used at fs creation time, but there is no problem
with changing it. The stripe_width is used by the allocator to align
file allocations with the RAID layout.
One question for Eric is whether the new libdisk patches he made will
set
the stripe_width to something ridiculous like 512 or 4096 bytes, or if
it
just leaves that field unset in that case. I suspect it would be bad
for
mballoc to see the stripe_width be such a small value.
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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