Re: [ceph-users] Changing SSD Landscape

I did stumble across Samsung PM1725/a in both AIC and 2.5” U.2 form factor. AIC starts at 1.6T and goes up to 6.4T, while 2.5” goes from 800G up to 6.4T. The thing that caught my eye with this model is the x8 lanes in AIC, and the 5DWPD over 5 years. No idea on how available it is, or how it

Re: [ceph-users] Changing SSD Landscape

Looking at that anandtech comparison it seems the Micron usually is worse than the P3700. This week I asked for a few nodes with P3700 400G and got an answer as they're end of sale, and the supplier wouldn't be able to get it anywhere in the world. Has anyone got a good replacement for these?

Re: [ceph-users] Changing SSD Landscape

> BTW, you asked about Samsung parts earlier. We are running these > SM863's in a block storage cluster: > > Model Family: Samsung based SSDs > Device Model: SAMSUNG MZ7KM240HAGR-0E005 > Firmware Version: GXM1003Q > > > 177 Wear_Leveling_Count 0x0013 094 094 005Pre-fail >

Re: [ceph-users] Changing SSD Landscape

> -Original Message- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Dan > van der Ster > Sent: 18 May 2017 09:30 > To: Christian Balzer <ch...@gol.com> > Cc: ceph-users <ceph-users@lists.ceph.com> > Subject: Re: [ceph-users] C

Re: [ceph-users] Changing SSD Landscape

On Thu, May 18, 2017 at 3:11 AM, Christian Balzer wrote: > On Wed, 17 May 2017 18:02:06 -0700 Ben Hines wrote: > >> Well, ceph journals are of course going away with the imminent bluestore. > Not really, in many senses. > But we should expect far fewer writes to pass through the

Re: [ceph-users] Changing SSD Landscape

On Wed, 17 May 2017 18:02:06 -0700 Ben Hines wrote: > Well, ceph journals are of course going away with the imminent bluestore. Not really, in many senses. > Are small SSDs still useful for something with Bluestore? > Of course, the WAL and other bits for the rocksdb, read up on it. On top of

Re: [ceph-users] Changing SSD Landscape

Well, ceph journals are of course going away with the imminent bluestore. Are small SSDs still useful for something with Bluestore? For speccing out a cluster today that is a many 6+ months away from being required, which I am going to be doing, i was thinking all-SSD would be the way to go. (or

Re: [ceph-users] Changing SSD Landscape

Hello, On Wed, 17 May 2017 11:28:17 +0200 Eneko Lacunza wrote: > Hi Nick, > > El 17/05/17 a las 11:12, Nick Fisk escribió: > > There seems to be a shift in enterprise SSD products to larger less write > > intensive products and generally costing more than what > > the existing P/S 3600/3700

Re: [ceph-users] Changing SSD Landscape

Agreed, the issue I have seen is that the P4800X (Optane) is demonstrably more expensive than the P3700 for a roughly equivalent amount of storage space (400G v 375G). However, the P4800X is perfectly suited to a Ceph environment, with 30 DWPD, or 12.3 PBW. And on top of that, it seems to

Re: [ceph-users] Changing SSD Landscape

>> Anyway, in a couple months we'll start testing the Optane drives. They >> are small and perhaps ideal journals, or? >> The problem with optanes is price: from what I've seen they cost 2x or 3x as much as the P3700... But at least from what I've read they do look really great...

Re: [ceph-users] Changing SSD Landscape

Hi Dan, > -Original Message- > From: Dan van der Ster [mailto:d...@vanderster.com] > Sent: 17 May 2017 10:29 > To: Nick Fisk <n...@fisk.me.uk> > Cc: ceph-users <ceph-users@lists.ceph.com> > Subject: Re: [ceph-users] Changing SSD Landscape > > I am

Re: [ceph-users] Changing SSD Landscape

On Wed, May 17, 2017 at 11:29 AM, Dan van der Ster wrote: > I am currently pricing out some DCS3520's, for OSDs. Word is that the > price is going up, but I don't have specifics, yet. > > I'm curious, does your real usage show that the 3500 series don't > offer enough

Re: [ceph-users] Changing SSD Landscape

I am currently pricing out some DCS3520's, for OSDs. Word is that the price is going up, but I don't have specifics, yet. I'm curious, does your real usage show that the 3500 series don't offer enough endurance? Here's one of our DCS3700's after 2.5 years of RBD + a bit of S3: Model Family:

[ceph-users] Changing SSD Landscape

Hi All, There seems to be a shift in enterprise SSD products to larger less write intensive products and generally costing more than what the existing P/S 3600/3700 ranges were. For example the new Intel NVME P4600 range seems to start at 2TB. Although I mention Intel products, this seems to be