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SSD - Most Important Metric

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When looking at SSD's, which metric to you find to be more important? IOPS or MB/s.

I've been hearing you should focus on IOPS more, but MB/s makes a lot more sense to me.

thank you

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For what kind of use? For desktop use, neither is important.

For server use, IOPS for your specific workload are what you are interested in. Again, your specific workload.

MB/sec for reads and writes is a low-level metric discussed right here on Storagereview and other sites as a metric with almost no bearing on actual end-user or server/workstation performance; obviously a drive that's absurdly slow will be a problem but so long as you're in the ballpark, you will learn very little from it.

If you are talking about MB/sec in specific benchmarks then that may be a useful metric, but again you need to be very specific.

The most critical issue facing most SSDs today is performance stuttering-- where the whole system goes non-responsive while the SSD writes data. Anandtech discusses this in detail.

http://www.anandtech.com/storage/showdoc.aspx?i=3531

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For me on my computer?

Maximum access latency.

Seriously. With STR, ALL are more than fast enough.

Same for read IOPS.

Whats left is maximum latency: If the computer is blocked for a second because of some stupid write-io lag, than you notice it more than anything else. As long as there are no big blocking latencies, even 50 Write IOPS are fine on the desktop

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thanks these are some good ways of looking at it. I'm more interested in the server arena -- but wanted to know how to look at it as a whole.

I forget, all the metrics are nice, but you need to see how you are specifically looking at the devices.

I will be reading through this article.

Thanks again for your comments and ideas.

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