On Tuesday 14 Feb 2017 01:51:01 wabe wrote:
> Mick <michaelkintz...@gmail.com> wrote:

> > Have you noticed a difference between mounting partitions on them
> > with the discard option, Vs running fstrim on a cron job?
> 
> I noticed a big performance impact with my old Corsair 60GB SSD
> (Force3 IIRC) when I used the discard option in fstab. So I decided
> to use the fstrim command instead, before I did my weekly backups.
> The fstrim command always needed about 10 minutes or so to complete
> its job.
> 
> About 1 year ago I replaced the Corsair with a Samsung SSD 850 PRO.
> With this device I did not notice a performance impact when the
> discard option is enabled and so I decided to use it.
> Btw: On the Samsung SSDs the fstrim command only needs a second or
> so to do its job.
> 
> I never used a benchmark program to check if there is really no
> difference. But at least I don't notice any in my every day use.
> 
> My old Corsair SSD (bought it in 2011) is still in use as swap
> space device in my Win7 machine (together with a SSD 850 PRO as
> system device). Before that, I used it as system disk on my gentoo
> machine. I also used it for my users mail and thumbnail directories
> and also for /log, /tmp, /var and the whole portage tree. Before
> I upgraded my gentoo machine to 16GB RAM I also used the SSD for
> portages temporary files. So it was really in heavy use. And is
> still running without problems.
> Before I installed the Corsair SSD into my Win machine, I used
> fstrim to increase the reserved space to 50%. I hope that it will
> run for at least another 6 years. ;-)
> 
> --
> Regards
> wabe

Thanks wabe, this is really interesting.  I was using discard and can't say I 
noticed any performance penalty on the OCZ drive.  I removed it and set up a 
fstrim cron job and suddenly there is a major I/O bottleneck when the cron job 
runs.  Perhaps I should be running it more often ...

-- 
Regards,
Mick

Attachment: signature.asc
Description: This is a digitally signed message part.

Reply via email to