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 Post subject: FC_r1 CPG
PostPosted: Wed Nov 27, 2019 1:27 pm 

Joined: Wed Nov 27, 2019 1:19 pm
Posts: 1
7400 480 10k SAS drives

We generally use a RAID5 CPG and haven't had any problems with performance. For more demanding workloads would I see any improvement using a RAID1 CPG?

Thank you


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 Post subject: Re: FC_r1 CPG
PostPosted: Wed Nov 27, 2019 4:23 pm 

Joined: Tue Mar 29, 2016 9:32 pm
Posts: 115
It would generate less backend (disk) I/O .. so yes you would.
Would you be separating the CPGs to their own spindles ?


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 Post subject: Re: FC_r1 CPG
PostPosted: Thu Nov 28, 2019 4:01 am 

Joined: Mon Sep 21, 2015 2:11 pm
Posts: 1002
Location: Europe
I would say it depends.

If you're maxing the backend (disk drives) during workloads, RAID1 will reduce the backend write IOPS with 50%. Read IOPS will not see any difference.

If you have large block size, you quickly run into fabric issues with 480 spindles in the 7400. If you're hitting a bottleneck in your fabric, RAID1 will not make a difference.

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