MrBenchmark

Monday April 18, 2005

RAID-1 vs RAID-5 - Part 6

Tonight, we are continuing our in-cache investigation by showing SE9980 results.
Please remember that the intent here is not to compare different IO subsystems, but really to understand how the different RAID algorithm compare.

We already noticed that this is STORAGE DEPENDANT. In fact, if the RAID level does not affect the SE6120 performance in-cache, it does cause RAID-5 to be 20% slower on the SE3510.

What about the SE9980 ?



Observations : When you can fit in the cache, RAID-1 and RAID-5 are delivering similar level of performance . However, the central cache architecture cause more variability on the SE9980 compare to the other IO subsystems.

Next on this blog, out-cache results.
When we do not fit in-cache anymore, does the behavior change ?

Apr 18 2005, 08:47:28 PM PDT Permalink