Here is a chart compiled from my own experience in real life that use virtual machines View 4.5.
Here is the translation for the design of a bay Pillar Data Axiom 600 which has the advantage of being really predictable. The values given here are conservative because they do not mention that the I / Os raw disks regardless of the cache ..
conducted following a bench in front of witnesses today in a VM on a Windows 2008 Axiom 600 and SATA three bricks. With 8k blocks, we get 14,350 I / Os.
a reminder, a slammer SAN controller input / output to servers, supports 250,000 IOPs: An array can incorporate up to 4 which allows the support of tens of thousands of virtual machines. To accelerate the deployment of VMs, I allowed myself to add a brick SSD option to increase performance a little. This is not mandatory, it's just my point of view:)
Finally, here is a proposal for setting the QOS different LUNs Bay. Of course, through this mechanism, you can run other applications simultaneously without having to invest in a new machine dedicated . Pillar Data has finally fulfilled the wishes of Cadbury: he always gives more.
few links to learn more:
http://ds45.blogspot.com/2010/10/qos-pillar-utilisation-du-cache.html
http://ds45.blogspot.com / 2010/12/repartition-des-luns-dans-une-baie.html
http://ds45.blogspot.com/2009/12/comment-beneficier-de-la-qos-pillar-en.html
http://ds45.blogspot.com/2011/01/stockage-de-nouveaux-concepts-qui.html
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