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
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