[PVE-User] openvz and java - Working?

Tony Zakula tony at zakula.com
Mon Aug 9 15:36:10 CEST 2010


I have worked quite a bit with different Java applications and Proxmox.
 While you can get things to work, I found it easier to just use KVM under
Proxmox for Java applications.  You may use a few more resources, but you
have more stability and more of a bare metal machine environment, especially
when the application experiences loads.  Java is just hard to work around
sometimes.  However, with Proxmox, everything works exactly the same just
about whether it is a container or KVM.  I initially tried everything with
the OpenVZ container, but soon grew tired of troubleshooting and tweaking
every application and just went the KVM route with Java apps.

My two cents,

Tony Z


On Mon, Aug 9, 2010 at 8:03 AM, Daniel Pittman <daniel at rimspace.net> wrote:

> Rudiger Wolf <Rudiger.Wolf at ThroughputFocus.com> writes:
> > On 09/08/10 11:00, pve-user-request at pve.proxmox.com wrote:
> >
> >> and no: we have plenty of Java working just fine in OpenVZ containers,
> both
> >> stand-alone and under Proxmox.
> >>
> >> The main thing to be cautious of is that Java will default to allocating
> some
> >> memory related parameters based on the amount of physical memory it sees
> in
> >> the system; you may need to tune that.
> >>
> >> However, generally they work OOTB on Proxmox, which does a fine job of
> >> presenting a realistic view to the JVM.
> >>
> >> For performance I would generally avoid allocating too much swap space
> to a
> >> JVM container, though, since you are better delegating memory trimming
> to the
> >> JVM itself as much as possible.
> >
> > I want to install Alfresco based in an OpenVZ VM based on the following
> > recipe.  Do you think that will be sufficient if I allocate 1GB RAM to
> the
> > OpenVZ VM?
>
> We have 1GB allocated to our smallest container which also runs a Java
> application, albeit not Alfresco, and it worked fine on Lenny/amd64, with
> Sun
> Java 6 underneath.
>
> Anyway, yeah, that is the sort of tuning I was talking about. :)
>
> Er, I don't actually know, but you might need to use a veth device rather
> than a venet device for the Alfresco SMB share thing to work.  If that is
> the
> document management thingy which does SMB/CIFS sharing, that is. :)
>
>        Daniel
>
> --
> ✣ Daniel Pittman            ✉ daniel at rimspace.net            ☎ +61 401 155
> 707
>               ♽ made with 100 percent post-consumer electrons
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