[gpfsug-discuss] SSDs for data - DWPD?

Valdis Kl=?utf-8?Q?=c4=93?=tnieks valdis.kletnieks at vt.edu
Tue Mar 19 17:22:32 GMT 2019


On Tue, 19 Mar 2019 12:10:08 -0000, Jonathan Buzzard said:

> I would be weary of write amplification in RAID coming to bite you in
> the ass. Just because you write 1TB of data to the file system does not
> mean the drives write 1TB of data, it could be 2TB of data.

Right, but that 2T would be across multiple drives.  That's part of
why write amplification can cause problems - many RAID subsystems
are unable to do the writes in true parallel across the drives involved.



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