[dm-devel] Benchmarking dm-crypt with different block size, request number and scheduler
Mikulas Patocka
mpatocka at redhat.com
Mon Feb 20 21:22:32 UTC 2012
On Mon, 20 Feb 2012, Alasdair G Kergon wrote:
> Were these tests all using that 'worst case' alignment you mentioned?
> - If so, people with such alignment could be advised to use deadline with
> huge queue depth?
>
> Alasdair
Some tests are with 512-byte block size, other with 4096-byte block size.
Alignment of partition start doesn't matter, because they were done on a
SCSI disk with 512-byte hardware sector size. Only alignment of partition
size does matter (if the partition has odd number of sectors, the kernel
uses 512-byte block size for this partition).
Mikulas
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