[TriLUG] Memcached and VMware ESX
jwheeler at etherealfringe.com
Thu Jul 2 16:02:04 EDT 2009
Just had a discussion with IT guy, he informed me that we are
switching to Xen for the mission critical stuff.
Good news :)
On Jul 2, 2009, at 3:18 PM, John Wheeler wrote:
> 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
>>> 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,
>>> 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
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>>> TriLUG FAQ : http://www.trilug.org/wiki/Frequently_Asked_Questions
>> Andrew D. Ball
>> deus caritas est
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