Multiple servers/master on a single host

[Rohit Manohar]

Hi

Do you know if running multiple masters and servers on a single host
can cause problems. I am running 6 clusters on two hosts, each cluster
consisting of a active-passive master pair and two servers. I am
seeing a lot of peer-timeout exceptions.

Regards

[Sergio Bossa]

On Sat, Jul 30, 2011 at 4:12 AM, Rohit Manohar <roh...@gmail.com> wrote:

> Do you know if running multiple masters and servers on a single host
> can cause problems. I am running 6 clusters on two hosts

There should be no problems, provided your hosts can keep up with the
amount of work submitted to Terrastore: I mean, if you submit too much
work, and your clusters start eating all of your operating system
CPU/memory, everything else will suffer from.

Having 6 clusters in just 2 hosts seems a bit too much, but again it
really depends on what you're actually doing, and your hardware
configuration.

Cheers,

Sergio B.

--
Sergio Bossa
http://www.linkedin.com/in/sergiob

[Rohit Manohar]

What is the default memory allocated to a Terrastore server/master?
What is the maximum amount that can be allocated?

On Jul 30, 1:41 am, Sergio Bossa <sergio.bo...@gmail.com> wrote:

[Sergio Bossa]

On Mon, Aug 1, 2011 at 9:06 PM, Rohit Manohar <roh...@gmail.com> wrote:

> What is the default memory allocated to a Terrastore server/master?
> What is the maximum amount that can be allocated?

Terrastore servers don't have any specific settings regarding memory
allocation: they adhere to the standard java ergonomics, as described
here: http://java.sun.com/docs/hotspot/gc5.0/ergo5.html

You can obviously raise the max amount of heap space by setting it on
the JAVA_OPTS env variable.

Hope that helps,