How to use trim command ?,Re: How to use trim command ?

[Poul-Henning Kamp]

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In message <20181201222424.0ae8abfd at gumby.homeunix.com>, RW via freebsd-hackers writes:
>On Sat, 01 Dec 2018 21:23:44 +0000

>> Why would you run 'fsck_ffs -E' in cron anyway ?
>> 
>> If the file-system is has TRIM enabled, it would be a no-op, unless
>> there are bugs in the fs ?
>
>There's a school of thought that trimming in real-time, after file
>deletion, slows down I/O on the device.

I suspect people would have reached that conclusion back when various
shady outfits started selling camera-grade FAL devices in 2.5"
form-factor.

My advice would be to avoid any device where that pattern is observed,
because that means there is too few write buffers and paths.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.