What types of SSDs to use.....

[Julian Elischer]

On 2/20/14, 10:02 PM, Erik Stian Tefre wrote:
>> 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.

the newest intel drives have enough RAM inhtem to actually index the 
entire drive in ram, so the performance is a lot better.
Prior to that they had to hold the index on flash, (with a cache).

>
> 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 
>

doesn't count PCI SSDs..

>
> -- 
> Erik
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