| Re: occasional high loadavg without any noticeable cpu/memory/io load [message #46485 is a reply to message #46448] |
Wed, 23 May 2012 07:14   |
Martin Dobrev
Messages: 14
Registered: November 2006
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Junior Member |
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Hi,
?? 22.5.2012 ?. 13:27 ?., Rene C. ??????:
> Hi Sirk,
>
>
> If you want some practical information on ploop: We are using it in a
> highly productive environment.
> It was either, try ploop and hope it works, or have the systems fail
> every 2nd day.
> So we decided to use ploop and are more than happy.
> It even solves a lot of issues we had with the private areas directly
> on the nfs share.
> But of course, thats totally up to you.
> I started with only a few "unimportant" CTs and then merged everything
> after a while (42 CTs).
>
>
> Thanks for the info, much appreciated!
>
> Maybe a little off topic, but I am curious to know: At the moment I
> find it very convenient to go directly into a containers filesystem
> from the hardware node - i.e. something like
> /vz/private/xxx/var/log/... etc - Would I be correct in presuming
> that by using ploop this will no longer be possible? I know I could
> just setup a test system and try it out but if you know already it
> would save me some time ;)
>
It's not very practical to access the containers from the VZ/private
mount point, as it breaks for example the quota stats of the container.
If you still want to do things there better go for the VZ/root mount
point. (Advice given to me by one of the now-a-days developer of
Viruozzo) And as you already mentioned ploop, as far as I know the
ploop-container will be mounted to VZ/root of the CT and you'll still
have access to the info in there.
>
> So you have a different FileSystem for the "problem"-Container that is
> even on a different disk ?
> If that is the case, this CT should not affect the others at all
> in terms of IO.
>
>
> Indeed, this is the only container on that filesystem and that
> physical drive. This time there were no "spill over" but previous
> times when load hit 50 or more the load certainly did spill into
> other containers.
> Best,
> Rene
>
>
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