Re: [Moosefs-users] This may be a BUG！

[Laurent W. <lw...@hy...>]

On Thu, 21 Oct 2010 10:58:12 +0800
leon hong <cod...@gm...> wrote:

>   hello, Michal
Hi Leon,
> 
>   I try delete some datas in mfsclient, but mfsmaster used ram is not
> reduced. I had set the trash time is 0 (mfssettrashtime 0 / usr / mfs /),
> what's the reason？
I'm pretty sure that mfs doesn't have any memleak. It would have killed
a lot of setups that run for months, or even years.
I don't have time to dive in the code to see how it works, but don't
forget that master only caches in ram metadata, not files contents.
So deleting a couple files isn't enough to get back large bunch of ram.
Definitely, if your master hardware config isn't strong enough to
manage the volume, add ram ! Or, at worst, you could hack some
metadata compression with zlib, but I'm really unsure about efficiency
(metadata are quite small) and performance impact may be rough.
Hope it helps,
-- 
Laurent Wandrebeck
HYGEOS, Earth Observation Department / Observation de la Terre
Euratechnologies
165 Avenue de Bretagne
59000 Lille, France
tel: +33 3 20 08 24 98
http://www.hygeos.com
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