[TriLUG] Memcached and VMware ESX
jwheeler at etherealfringe.com
Thu Jul 2 15:18:22 EDT 2009
2 Dell 2950's
On Jul 2, 2009, at 2:49 PM, Andrew Ball wrote:
> It probably won't slow things down a whole lot. We use Xen virtual
> at work running on Debian for just about everything and are very
> happy with
> it. I think memcached is particularly easy to do well for either
> as it's mostly just RAM access and network traffic.
> What sort of hardware are you using?
> On Thu, Jul 2, 2009 at 12:04 PM, John Wheeler
> <jwheeler at etherealfringe.com>wrote:
>> Hey guys,
>> I'm re-factoring some caching code for our web application and
>> working with
>> IT to implement our new dedicated memcached servers.
>> We have two machines with 32Gb a piece.
>> The nature of our application is that multiple client communities
>> the same kind of service but with completely different data sets
>> and search
>> We want to balance the load by distributing the heavy lifting of some
>> search vectors to memcahce.
>> We can either install thin OS's on each machine and have two
>> servers, or we can lose 4Gb off the top on each box (to the VMware
>> hypervisor) and create virtual memcached servers.
>> We run WMware ESX.
>> The key is that this has to be as fast as possible.
>> I am looking for opinions on whether or not running inside the
>> will slow the speed of direct memory access by the memcached
>> living inside the virtual machines by any significant amount
>> relative to
>> normal memcached response times.
>> The benefit we get by virtualizing is the ability to provision
>> server pools for individual client implementations, keeping heavier
>> application deployments bucketed into their own pools so as not to
>> and push out the smaller, less accessed implementation's cache
>> I am not really concerned about losing the 4Gb to the hypervisor, but
>> should running in a virtualized environment like this slow down our
>> application requests to the memcached server?
>> John Wheeler
>> Web Applications Developer
>> jwheeler at etherealfringe.com
>> TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug
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> Andrew D. Ball
> deus caritas est
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