zfs discuss - Feb 2009 - SSD - slow down with age

A useful article about long term use of the Intel SSD X25-M:
http://www.pcper.com/article.php?aid=669 -  Long-term performance analysis
of Intel Mainstream SSDs.
Would a zfs cache (ZIL or ARC) based on a SSD device see this kind of issue?
 Maybe a periodic scrub via a full disk erase would be a useful process.

Nicholas
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On Feb 14, 2009, at 12:45 PM, Nicholas Lee wrote:
> A useful article about long term use of the Intel SSD X25-M:
http://www.pcper.com/article.php?aid=669
>  - 	Long-term performance analysis of Intel Mainstream SSDs.
>
> Would a zfs cache (ZIL or ARC) based on a SSD device see this kind  
> of issue?  Maybe a periodic scrub via a full disk erase would be a  
> useful process.
Indeed SSDs can have certain properties that would cause their  
performance to degrade over time. We''ve seen this to varying degrees  
with different devices we''ve tested in our lab. We''re working
on
adapting our use of SSDs with ZFS as a ZIL device, an L2ARC device,  
and eventually as primary storage. We''ll first focus on the specific  
SSDs we certify for use in our general purpose servers and the Sun  
Storage 7000 series, and help influence the industry to move to  
standards that we can then use.

Adam

--
Adam Leventhal, Fishworks                        http://blogs.sun.com/ahl