How should I determine exact over-provisioning levels for 1TB Samsung 850 Pro SSDs to be used in a Raid 10?
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I think your idea makes more sense. Limit was is provisioned on a disk by disk level if the option is available to you. Otherwise, the controller is smarter than we assume that it is.
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@xByteSean and co., would be interested to get your feedback on this too if you have any. Thanks!
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So I'm still at a loss for this but am going to deploy these SSDs in the next few days. @scottalanmiller , what do you think of over-provisioning them such that 20 or 25% of the full capacity is reserved per drive? Is that heinous ovekill?
The workload will be Windows Server 2012 R2, IIS, MySQL, and a J2EE app server, running for the most part a single application. Thanks.
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20% is a lot, but not crazy overkill. I might taper that back to 15% myself. But if that gives you enough capacity for your needs, go for it.
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@scottalanmiller said:
20% is a lot, but not crazy overkill. I might taper that back to 15% myself. But if that gives you enough capacity for your needs, go for it.
Sounds good to me. And I believe the RAID controller supports online modification so I could theoretically add another 4 1TB drives to the 10 later if/when I need it. Thanks for your help, much appreciated.
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Drives are deployed. Benchmarks attached.
The left is a Raid 10 of 10K 6 Gbps SAS drives, to the right is the Raid 10 of 6 Gbps SSDs. Thanks to everyone for the help.
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And that is just througput, measure the IOPS for the BIG increase!!
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@scottalanmiller Good call. Can you suggest a good tool to do that with?
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@creayt said:
@scottalanmiller Good call. Can you suggest a good tool to do that with?
http://community.spiceworks.com/topic/314145-what-is-the-best-i-o-iops-testing-tool-out-there
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@thecreativeone91 said:
@creayt said:
@scottalanmiller Good call. Can you suggest a good tool to do that with?
http://community.spiceworks.com/topic/314145-what-is-the-best-i-o-iops-testing-tool-out-there
That's what I found last night, installed it, tried to run something obvious but it looks like it requires a bit of an investment in setting up testing. Was hoping for something a little bit simpler to just plug and play, but I can definitely dig into it when I get some downtime. Thx.
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