On 12.09.2012 20:15, Lukáš Czerner wrote:
On Wed, 12 Sep 2012, norritt@xxxxxxxxxxx wrote:
From what I've found out it's a good idea to:
- mount with noatime, discard (if drive supports trim)
The -o discard option might be tricky since some devices still
handles it quite badly and you can experience big performance drops
(http://people.redhat.com/lczerner/discard/ although it is somewhat
outdated already). But you might to try to see yourself if it does
not hurt your performance.
The other option would be to use batched discard with fstrim (see
fstrim from util-linux) and run it once per (day, week, month).
Thanks!
-Lukas
Hi Lukáš,
thank you for pointing out the performance issue with the discard mount
option, I hadn't read about that yet. As far is I know I'm using a quite
special SSD (SanDisk, with a SanDisk controller), where most other SSDs
on the market seem to be based on Marvell, Sandforce or Indilinx
controllers. I saw that you were using SSDs from various vendors for
your benchmarking tests. Was a model with SanDisk controller among the
drives you tested? Would postmark data about disks with SanDisk
controller be of interest to you?
Regards Nor
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