Storage Nation » sfoskett http://storagenation.com Pulling back the covers on the storage industry. Wed, 08 Sep 2010 23:28:23 +0000 http://wordpress.org/?v=2.8 en hourly 1 Enterprise Computing: The Benefits of Wide Striping – Avoiding A Long Tail http://storagenation.com/enterprise-computing-the-benefits-of-wide-striping-%e2%80%93-avoiding-a-long-tail/ http://storagenation.com/enterprise-computing-the-benefits-of-wide-striping-%e2%80%93-avoiding-a-long-tail/#comments Thu, 18 Mar 2010 22:12:15 +0000 admin http://storagenation.com/enterprise-computing-the-benefits-of-wide-striping-%e2%80%93-avoiding-a-long-tail/ IOPS Per RAID Group, ordered by most to least I took part in a podcast last night that discussed the XIV platform.  One of the “key features” of XIV is the wide striping of data across all spindles.  It’s a concept we’re seeing more and more in contemporary storage hardware architectures and one that’s being shoe-horned into older storage arrays too.  Have you ever wondered what the point is?  Take a look at the following graphic.  It shows the number of write operations per RAID group, ordered by the busiest RAID group to the least active.  It’s real data from a real system.  What you see is the Long Tail effect, where a small number of RAID groups are doing most of the I/O.  In this example, 80% of the workload is performed by 50% of the RAID groups; only 3 RAID groups account for 20% of the workload.

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Enterprise Computing: The Benefits of Wide Striping – Avoiding A Long Tail

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