Re: Software RAID checksum performance on 24 disks not even close to kernel reported

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On Tue, Jun 5, 2012 at 5:39 AM, Igor M Podlesny <for.poige+lsr@xxxxxxxxx> wrote:
> On 5 June 2012 07:14, Ole Tange <ole@xxxxxxxx> wrote:
> […]
>> I tested this by creating 24 devices in RAM, used different chunk
>> sizes, and then copied the linux kernel source. Test script can be
>> found on http://oletange.blogspot.dk/2012/05/software-raid-performance-on-24-disks.html
>
>   I don't see there "--assume-clean" option, and it's (again) not
> clear — are you playing with re-syncing RAID or what?

Good call. But the resync is done before the mkfs.xfs is finished, so
the time of the copying is not affected by resync.

I re-tested with --assume-clean and as expected it has no impact.


/Ole
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