04-16-2009 02:44 PM
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04-16-2009 11:18 PM
04-16-2009 11:18 PM
04-17-2009 04:38 AM
Depending on the IOPS you expect to hit the EVA device with
The EVA devices use VLUN's. This basically means that you are going to get the dedicated number of IOPS per LUN as you would on a SAN that creates real LUN's
If the EVA device is being used for another application as well as Enterprise Vailt and if you expect to have a lot of users in EV then I would realy watch the number of spindles and IOPS you get when running your applications
We have found that because of the VLUN's and because at one time our EVA was being used for file storage for the user population as well as EV indexes and databases the IOPS the EVA could provide were not sufficent to meet our needs.
We neded up changing and dedicating an EMC SAN to the EV environment because it created real LUN's and we could spec out the exact IOPS per LUN, something that we were unable to do on the EVA
Also you may find that if you ever get disk failures on the EVA and you have a large amount of data the EVA will always be leveling. This adds overhead to the disk IO and may decrease VLUN IO performance
Personally I have had a bad experience with EVA hardware and thats why we moved to a "real SAN" where we could build real RAID and dedicate disk instead of the HP EVA VLUN attempt at making a SAN idiot proof
You know what they say....when you make it idiot proof they just build better idiots
04-29-2009 10:07 AM
04-29-2009 10:17 AM