What types of SSDs to use.....

[Erik Stian Tefre]

> Hi,
>
> I'm looking for advise and suggestions on what SSDs to use for the
> ZFS-systems I have and/or am building....
>
> I know the difference between SLC en MLC , but beyond that I have not
> the best experience with all the older SSD I have lingering about here.
>
> Most of them just "disconnect" after a while.
> It could be because they have exceeded their wear level and just can not
> write any more.  But than that has occurred rather fast.
>
> So what types SSD are others using for
> 	ZIL
> 	cache
> what is your experience with them
>
Intel SSDs are good. I've got some handfuls of x25-e, 320, DC S3500 and 
DC S3700 running in supermicro servers and none of them have ever failed 
or dropped out in any way. The x25-es have been hammered with database 
loads 24/7 since 2009 without any issues.

I use DC S3500 for cache. DC S3700 is probably better for ZIL. (The 3700 
has a higher write endurance HET-MLC, 10x the endurance of the S3500 I 
think and 4x the write IOPS.)

Here's an interesting SSD stress test report by the way:
http://www.extremetech.com/computing/173887-ssd-stress-testing-finds-intel-might-be-the-only-reliable-drive-manufacturer

--
Erik