On Thu, 25 Feb 2016 16:41:59 -0500 (EST) Shinobu Kinjo wrote: > > 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). > > This is very good to know. > Can anybody elaborate on this a bit more? > I suggest you read the entire "XFS and nobarriers on Intel SSD" thread on this very ML, the first ML hit when googling "Ceph LSI SSD". Note I saw problems with un-patched S3610s (never with 3700s) even when connected to the onboard Intel SATA controller. After updating their firmware this was fixed, but for good measure I also went no-barrier and upgraded to the latest Debian kernel (4.3), for all the good that will do. Christian > Rgds, > Shinobu > > ----- Original Message ----- > From: "Jan Schermer" <jan@xxxxxxxxxxx> > To: "Nick Fisk" <nick@xxxxxxxxxx> > Cc: "Robert LeBlanc" <robert@xxxxxxxxxxxxx>, "Shinobu Kinjo" > <skinjo@xxxxxxxxxx>, ceph-users@xxxxxxxxxxxxxx Sent: Thursday, February > 25, 2016 11:10:41 PM Subject: Re: List of SSDs > > 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 > > <mailto:ceph-users-bounces@xxxxxxxxxxxxxx>] On Behalf Of Robert > > LeBlanc Sent: 25 February 2016 05:56 To: Shinobu Kinjo > > <skinjo@xxxxxxxxxx <mailto:skinjo@xxxxxxxxxx>> Cc: ceph-users > > <ceph-users@xxxxxxxxxxxxxx <mailto: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 > > <mailto: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 > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > <http://xo4t.mj.am/link/xo4t/x0557gim2n74/1/sbo9Blye4QJEav_CN9NrlA/aHR0cDovL2xpc3RzLmNlcGguY29tL2xpc3RpbmZvLmNnaS9jZXBoLXVzZXJzLWNlcGguY29t> > > _______________________________________________ ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > <http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com> > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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