HPE Storage Users Group
https://3parug.com/

backend IOPS
https://3parug.com/viewtopic.php?f=18&t=3051		 Page 1 of 1
Author:  axelle94 [ Mon Dec 10, 2018 3:50 pm ]
Post subject:  backend IOPS
Hello,

I would like to understand somethings.

I read on internet, if you have a Raid5 you will have a write-penalty of 4.

It is the same if you have a setsize of 3+1 or 7+1 ? Does it change ?

On Ninja you have front-end IOPS estimated, and i would like to calculate back-end IOPS.

thank you
:P
Author:  MammaGutt [ Tue Dec 11, 2018 7:16 am ]
Post subject:  Re: backend IOPS
Write penalty per disk is the same.
IO1: read data
IO2: read parity
IO3: write data
IO4: write parity

What do change with larger set sizes is how much data needs to be read to re-create parity during disk failure as it needs to read the entire set.


Also, RAID6 is the way to go now.
Page 1 of 1 All times are UTC - 5 hours
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/