Re: List of SSDs

[Jan Schermer <jan@xxxxxxxxxxx>]

We are very happy with S3610s in our cluster.

We had to flash a new firmware because of latency spikes (NCQ-related), but had zero problems after that...

Just beware of HBA compatibility, even in passthrough mode some crappy firmwares can try and be smart about what you can do (LSI-Avago, I'm looking your way for crippling TRIM, seriously WTH).

Jan

On 25 Feb 2016, at 14:48, Nick Fisk <nick@xxxxxxxxxx> wrote:

There’s two factors really

 

1.       Suitability for use in ceph

2.       Number of people using them

 

For #1, there are a number of people using various different drives, so lots of options. The blog articled linked is a good place to start.

 

For #2 and I think this is quite important. Lots of people use the S3xx’s intel drives. This means any problems you face will likely have a lot of input from other people. Also you are less likely to face surprises, as most usage cases have already been covered. 

 

From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Robert LeBlanc
Sent: 25 February 2016 05:56
To: Shinobu Kinjo <skinjo@xxxxxxxxxx>
Cc: ceph-users <ceph-users@xxxxxxxxxxxxxx>
Subject: Re: List of SSDs

 

We are moving to the Intel S3610, from our testing it is a good balance between price, performance and longevity. But as with all things, do your testing ahead of time. This will be our third model of SSDs for our cluster. The S3500s didn't have enough life and performance tapers off add it gets full. The Micron M600s looked good with the Sebastian journal tests, but once in use for a while go downhill pretty bad. We also tested Micron M500dc drives and they were on par with the S3610s and are more expensive and are closer to EoL. The S3700s didn't have quite the same performance as the S3610s, but they will last forever and are very stable in terms of performance and have the best power loss protection. 

Short answer is test them for yourself to make sure they will work. You are pretty safe with the Intel S3xxx drives. The Micron M500dc is also pretty safe based on my experience. It had also been mentioned that someone has had good experience with a Samsung DC Pro (has to have both DC and Pro in the name), but we weren't able to get any quick enough to test so I can't vouch for them. 

Sent from a mobile device, please excuse any typos.

On Feb 24, 2016 6:37 PM, "Shinobu Kinjo" <skinjo@xxxxxxxxxx> wrote:

Hello,

There has been a bunch of discussion about using SSD.
Does anyone have any list of SSDs describing which SSD is highly recommended, which SSD is not.

Rgds,
Shinobu
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