I don't think this is correct. My understanding is: There is no longer express edition. Grand fathered to standard. Standard edition (sockets) remains. Advanced edition (sockets) is available for existing advanced customers only. Grand fathering to DME available. Data management (mostly capacity but per disk in ESS and DSS-G configs, different cost for flash or spinning drives).
I'm sure Carl can correct me if I'm wrong here. Simon ________________________________________ From: [email protected] [[email protected]] on behalf of [email protected] [[email protected]] Sent: 14 March 2018 19:23 To: gpfsug main discussion list Subject: Re: [gpfsug-discuss] Preferred NSD My understanding is that with Spectrum Scale 5.0 there is no longer a standard edition, only data management and advanced, and the pricing is all done via storage not sockets. Now there may be some grandfathering for those with existing socket licenses but I really do not know. My point is that data management is not the same as advanced edition. Again I could be wrong because I tend not to concern myself with how the product is licensed. Fred __________________________________________________ Fred Stock | IBM Pittsburgh Lab | 720-430-8821 [email protected] From: Stephen Ulmer <[email protected]> To: gpfsug main discussion list <[email protected]> Date: 03/14/2018 03:06 PM Subject: Re: [gpfsug-discuss] Preferred NSD Sent by: [email protected] ________________________________ Depending on the size... I just quoted something both ways and DME (which is Advanced Edition equivalent) was about $400K cheaper than Standard Edition socket pricing for this particular customer and use case. It all depends. Also, for the case where the OP wants to distribute the file system around on NVMe in *every* node, there is always the FPO license. The FPO license can share NSDs with other FPO licensed nodes and servers (just not clients). -- Stephen On Mar 14, 2018, at 1:33 PM, Sobey, Richard A <[email protected]<mailto:[email protected]>> wrote: 2. Have data management edition and capacity license the amount of storage. There goes the budget 😉 Richard -----Original Message----- From: [email protected]<mailto:[email protected]><[email protected]<mailto:[email protected]>> On Behalf Of Simon Thompson (IT Research Support) Sent: 14 March 2018 16:54 To: gpfsug main discussion list <[email protected]<mailto:[email protected]>> Subject: Re: [gpfsug-discuss] Preferred NSD Not always true. 1. Use them with socket licenses as HAWC or LROC is OK on a client. 2. Have data management edition and capacity license the amount of storage. Simon ________________________________________ From: [email protected]<mailto:[email protected]>[[email protected]<mailto:[email protected]>] on behalf of Jeffrey R. Lang [[email protected]<mailto:[email protected]>] Sent: 14 March 2018 14:11 To: gpfsug main discussion list Subject: Re: [gpfsug-discuss] Preferred NSD Something I haven't heard in this discussion, it that of licensing of GPFS. I believe that once you export disks from a node it then becomes a server node and the license may need to be changed, from client to server. There goes the budget. -----Original Message----- From: [email protected]<mailto:[email protected]><[email protected]<mailto:[email protected]>> On Behalf Of Lukas Hejtmanek Sent: Wednesday, March 14, 2018 4:28 AM To: gpfsug main discussion list <[email protected]<mailto:[email protected]>> Subject: Re: [gpfsug-discuss] Preferred NSD Hello, thank you for insight. Well, the point is, that I will get ~60 with 120 NVMe disks in it, each about 2TB size. It means that I will have 240TB in NVMe SSD that could build nice shared scratch. Moreover, I have no different HW or place to put these SSDs into. They have to be in the compute nodes. On Tue, Mar 13, 2018 at 10:48:21AM -0700, Alex Chekholko wrote: I would like to discourage you from building a large distributed clustered filesystem made of many unreliable components. You will need to overprovision your interconnect and will also spend a lot of time in "healing" or "degraded" state. It is typically cheaper to centralize the storage into a subset of nodes and configure those to be more highly available. E.g. of your 60 nodes, take 8 and put all the storage into those and make that a dedicated GPFS cluster with no compute jobs on those nodes. Again, you'll still need really beefy and reliable interconnect to make this work. Stepping back; what is the actual problem you're trying to solve? I have certainly been in that situation before, where the problem is more like: "I have a fixed hardware configuration that I can't change, and I want to try to shoehorn a parallel filesystem onto that." I would recommend looking closer at your actual workloads. If this is a "scratch" filesystem and file access is mostly from one node at a time, it's not very useful to make two additional copies of that data on other nodes, and it will only slow you down. Regards, Alex On Tue, Mar 13, 2018 at 7:16 AM, Lukas Hejtmanek <[email protected]<mailto:[email protected]>> wrote: On Tue, Mar 13, 2018 at 10:37:43AM +0000, John Hearns wrote: Lukas, It looks like you are proposing a setup which uses your compute servers as storage servers also? yes, exactly. I would like to utilise NVMe SSDs that are in every compute servers.. Using them as a shared scratch area with GPFS is one of the options. * I'm thinking about the following setup: ~ 60 nodes, each with two enterprise NVMe SSDs, FDR IB interconnected There is nothing wrong with this concept, for instance see https://www.beegfs.io/wiki/BeeOND<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.beegfs.io_wiki_BeeOND&d=DwMFaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=p_1XEUyoJ7-VJxF_w8h9gJh8_Wj0Pey73LCLLoxodpw&m=kB88vNQV9x5UFOu3tBxpRKmS3rSCi68KIBxOa_D5ji8&s=hkQw7geQgSpunsoZykLw_1bssNIeqzdGTV81d7nKfjk&e=> I have an NVMe filesystem which uses 60 drives, but there are 10 servers. You should look at "failure zones" also. you still need the storage servers and local SSDs to use only for caching, do I understand correctly? From: [email protected]<mailto:[email protected]> [mailto:gpfsug-discuss- [email protected]<mailto:[email protected]>] On Behalf Of Knister, Aaron S. (GSFC-606.2)[COMPUTER SCIENCE CORP] Sent: Monday, March 12, 2018 4:14 PM To: gpfsug main discussion list <[email protected]<mailto:[email protected]>> Subject: Re: [gpfsug-discuss] Preferred NSD Hi Lukas, Check out FPO mode. That mimics Hadoop's data placement features. You can have up to 3 replicas both data and metadata but still the downside, though, as you say is the wrong node failures will take your cluster down. You might want to check out something like Excelero's NVMesh (note: not an endorsement since I can't give such things) which can create logical volumes across all your NVMe drives. The product has erasure coding on their roadmap. I'm not sure if they've released that feature yet but in theory it will give better fault tolerance *and* you'll get more efficient usage of your SSDs. I'm sure there are other ways to skin this cat too. -Aaron On March 12, 2018 at 10:59:35 EDT, Lukas Hejtmanek <[email protected]<mailto:[email protected]> <mailto:[email protected]>> wrote: Hello, I'm thinking about the following setup: ~ 60 nodes, each with two enterprise NVMe SSDs, FDR IB interconnected I would like to setup shared scratch area using GPFS and those NVMe SSDs. Each SSDs as on NSD. I don't think like 5 or more data/metadata replicas are practical here. On the other hand, multiple node failures is something really expected. Is there a way to instrument that local NSD is strongly preferred to store data? I.e. node failure most probably does not result in unavailable data for the other nodes? Or is there any other recommendation/solution to build shared scratch with GPFS in such setup? 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