XFS Preallocate using ALLOCSP
sandeen at sandeen.net
Tue Jun 16 12:32:39 CDT 2009
Smit Shah wrote:
> On 6/16/09, Felix Blyakher <felixb at sgi.com> wrote:
>> On Jun 16, 2009, at 10:16 AM, Eric Sandeen wrote:
>>> Maybe I should ask what the end goal is here. :)
> Just to see if preallocation using fallocate helps reducing the
> fragmentation and increases the throughput. I guess it wll help
> reduce the fragmentation but the write performance is going to suffer.
Depends on the IO you do, I think. I'd be curious to know exactly how
you're running preallocation & iometer so I could give it a shot, to see
why xfs seems to be doing worse than ext4.
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