Re: Moving Jenkins master ASAP
On 07/31/2012 07:12 PM, Ewoud Kohl van Wijngaarden wrote:
On Tue, Jul 31, 2012 at 02:57:56PM -0400, Robert Middleswarth wrote:
> On 07/31/2012 02:16 PM, Ewoud Kohl van Wijngaarden wrote:
>> On Tue, Jul 31, 2012 at 07:52:25AM -0700, Karsten 'quaid' Wade wrote:
>>> On 07/31/2012 07:44 AM, Karsten 'quaid' Wade wrote:
>>>> We need to pick a new hosting solution for jenkins.ovirt.org.
>>>>
>>>> One idea is for us to throw out some favorite hosting providers
>>>> here, and see if we can sort out what would be a good solution.
>>> This post is what made me aware that EC2 would be a dead-end for us
>>> for now:
>>>
>>> http://blog.carlmercier.com/2012/01/05/ec2-is-basically-one-big-ripoff/
>>>
>>> In that post, the author used this host for comparison testing:
>>>
>>> http://joesdatacenter.com/
>> My employer is a hosting provider so I'm somewhat biased here.
> It not just about the provider. I would need to see the bandwidth
> charts on the current Jenkins but I assume Just about any provider
> can handle it bandwidth needs. But the server Jenkins Master needs
> to run on. EC2 isn't cutting it. My testing box is a basic Sata
> drive and it is running much faster but there is no user load on the
> box. We really need a box with raid 10 drives in it to handle the
> high IO needs.
http://jenkins.ekohl.nl/munin/ekohl.nl/jenkins.ekohl.nl/index.html are
the stats of the jenkins slave we (my employer) provide. This is a
production load. Quick analysis shows that IO is limiting at times, but
the high IO peaks correlate to the swap. So adding more than 8GB RAM
would lessen the requirement on the IO. Note that it is currently
running on our SATA SAN, but I don't know the RAID config from the top
of my head.
Slave boxes are diff from the master. Jenkins copies all the files
over
from the master to the slave then back up to the master. Using a good
chunk of bandwidith and disk IO on both the slaves and the master.
Every job requires IO on the master and a lot of it. As the number of
slaves goes up so does the IO on the master. The current EC2 instance
isn't holding it own with load. Spikes can literately take it offline
and even when it is idle it still is showing a ton of IO from the people
visiting the site. The question is with the limited budget what can we do.
What we really want for the master is a dedicated machine with a sas /
ssd raid 10 controller aka the profile of a database server. What we
can get away with for now is the real question. I can offer up my boxes
they are just running on Sata drives and currently running behind my
70/35 Verizon FiOS connection ( Jenkins.ovirt.info ). We could move
them to a local co-lo for about $40.00 a U per month a friend of mine runs.
What does everyone else think?
--
Thanks
Robert Middleswarth
@rmiddle (twitter/IRC)