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тАО06-10-2011 03:58 AM
тАО06-10-2011 03:58 AM
we are doing some tuning tests on our older EVA6000. As we already knew, write speed could peek max 180MB/s due 2Gbit connection between eva controllers (say design feature).
For some reason, we created raid0 vdisk and our tests are big surprise - on disk group with 28 15K 136GB drives we reached 360MB/s write (with write cache enabled) and 260MB/s (with write cache disabled). See screenshot.
Any ideas how it is possible?
Solved! Go to Solution.
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тАО06-10-2011 10:15 PM
тАО06-10-2011 10:15 PM
Re: EVA6000 write speed over 180MB/s ?
that 180MB/s is a single port bandwidth. If you have multipathing solution the IO will pass through all the ports, so max bandwitdh will be 180MB*4 (As EVA 6000 will have 2 ports per controller). Hope this may be the situation in your case!!!
Siva...
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тАО06-12-2011 01:20 AM
тАО06-12-2011 01:20 AM
Re: EVA6000 write speed over 180MB/s ?
360 MB/s can be reached by using two host-ports. If you're using MPIO it will distribute the load over all active and optimized paths.
Regards,
Patrick
Patrick
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тАО06-12-2011 02:22 AM
тАО06-12-2011 02:22 AM
Re: EVA6000 write speed over 180MB/s ?
maybe I am wrong,
but have we can reach this in 1 single 2Gb pipeline between controllers? And why other raids like r10 do not perform the same way?
I think it is not multipath related,
I'll test it on other server without mpio.
jan
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тАО06-12-2011 08:01 AM
тАО06-12-2011 08:01 AM
Re: EVA6000 write speed over 180MB/s ?
Regards,
Patrick
Patrick
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тАО06-12-2011 08:28 AM
тАО06-12-2011 08:28 AM
Re: EVA6000 write speed over 180MB/s ?
I can't believe my eyes, that's why I'm asking how it could be... :)
Jan
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тАО06-12-2011 08:38 PM
тАО06-12-2011 08:38 PM
Re: EVA6000 write speed over 180MB/s ?
The "HSV 200" you are observing from Command View EVA??? or the Physical Plastic Bezil of the Controller.
Why because, there are 3 models of HSV 200 controllers.
HSV 200 - 2Gb Port speed
HSV 200-A - 4Gb port speed
HSV 200-B - 4Gb Port speed(4100/6100)
All the models will be appeared as only HSV 200 in Command view EVA!!!!
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тАО06-12-2011 10:58 PM
тАО06-12-2011 10:58 PM
Re: EVA6000 write speed over 180MB/s ?
it is just normal HSV200, with 4Gb hosts port, and as I know, 2Gb mirror connection.
So, pretty interesting.
Jan
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тАО06-12-2011 11:04 PM
тАО06-12-2011 11:04 PM
Re: EVA6000 write speed over 180MB/s ?
It is sure that if the host port speed is 4Gb, either the controller would be HSV200-A or HSV200-B.
The initial model of this EVA was only with 2GB Host port, where as the Device and Mirror port speeds are 2Gb for all models.
If the host port speed is 4Gb then there is no surpise in getting 360MB/s...
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тАО06-13-2011 12:59 AM