Re: How to slow more copying of files ?
On 3/19/19 11:39 AM, tomas@tuxteam.de wrote:
On Tue, Mar 19, 2019 at 11:29:36AM +0100, Pierre Couderc wrote:
Big copy operations (with cp) may be slow, but it is not my problem.
But too, they slow the full computer !
Is there a way to slow the copy which is not a priority task to let
the computer breath.... ?
This is more complicated than you might wish :-)
The problem centers around the definition of "slow": clearly, some
resource is being hogged by your 'cp', but which one(s) will depend
much on your hardware.
in fact, in this case, it is a copy of mailboxes (many small files) from
a location to another, the whole on a brtfs RAID1 device...
Since you have tried 'nice' with no effect, let's assume that this
resource isn't CPU.
Yes, top, shows it (what it is allowed to run ;)
Then, you might have a look at 'ionice' (from
the package util-linux). But too little RAM might be as well a
problem.
Another avenue might be using rsync, which offer a rate-limiting
option (--bwlimit).
Thank you, sure I shold use rsync or ionice.
Anyway, it not a reptitive tasks, but it was yo understand...
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