topic MSA 1500 Performance Problems in MSA Storage

MSA 1500 Performance Problems

beovax — Thu, 29 Jan 2009 10:43:31 GMT

We are experiencing very slow IO during our backup routine. We have run the perf tool on each controller during the backup window, but we are not sure if any of the results represents a bottleneck.

We can see that LUN 3 & 5 have the highest load and we are looking at seaperating them onto different controllers.

I have attched an excel document with the relevant figures

Thanks in advance

Re: MSA 1500 Performance Problems

James Muell — Fri, 30 Jan 2009 14:21:53 GMT

distributing luns across the controllers is the right direction, but if your hitting the same Array set w/ I/O from 2 different luns, 1 on each controller you won't get much more perf from the MSA contrl. it only runs at 160mb/sec anyway.

Re: MSA 1500 Performance Problems

beovax — Fri, 30 Jan 2009 14:26:06 GMT

We have only configured a single logical drive per array.

The MSA appears to handle more read requests than writes, we are also thinking about adjusting the cache ratio from 50/50 to 60/40 or 70/30