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How does RAID 10 affect IOPS?

Splunk Employee
Splunk Employee

How can I calculate approximate expected IOPS once I have measured or estimated the IOPS for a drive?

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1 Solution

Splunk Employee
Splunk Employee

For reads RAID 10 will give 100% of the read IOPS for all the drives, so for 4 disks with 210 IOPS, you would get 840 read IOPS.

For writes RAID 10 will give you 50% of the write IOPS for all the drives, so for 4 disks with 210 IOPS, you would get 420 write IOPS.

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Splunk Employee
Splunk Employee

For reads RAID 10 will give 100% of the read IOPS for all the drives, so for 4 disks with 210 IOPS, you would get 840 read IOPS.

For writes RAID 10 will give you 50% of the write IOPS for all the drives, so for 4 disks with 210 IOPS, you would get 420 write IOPS.

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Splunk Employee
Splunk Employee

Updated! Thanks @sdvorak_splunk

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Splunk Employee
Splunk Employee

Just to correct math write performance would be 420 IOPs. These numbers are ballpark but a good illustration. Thanks, Dart!