[CentOS] To discard... or not to discard...

On Wed, 4 Dec 2013, Akemi Yagi wrote:

> In addition to the RH doc referenced by LF, I found this web page useful:
>
> http://blog.neutrino.es/2013/howto-properly-activate-trim-for-your-ssd-on-linux-fstrim-lvm-and-dmcrypt/
>
> Quote: [....]
>
> Instead, what I recommend is to run a script periodically to tell 
> the SSD which blocks are free with the command fstrim. Doing this 
> operation daily or weekly is more than enough. This way we do not 
> lose any performance due to TRIM when deleting files and we 
> periodically keep informed the SSD about the free blocks."

I was pondering dropping in a cron job that invokes fstrim on servers 
with SSDs, esp. now that 6.5 supports TRIM on MD RAID-1 devices. It 
appears that making it a weekly job will do the trick.

-- 
Paul Heinlein
heinlein at madboa.com
45°38' N, 122°6' W