Re: [Beowulf] Slow RAID reads, no errors logged, why?

2018-03-21 Thread Jonathan Engwall
I am curious about such things. The DELL specs show the 710 can handle 32 devices, while the 730 can handle 255! The pdf spec sheet also says the h730 has "workload profiles." If you are nowhere near 255 disks perhaps you can change the controller? On Wed, Mar 21, 2018 at 9:21 AM, David Mathog wr

[Beowulf] AMD Epyc + Omni-Path?

2018-03-21 Thread Bill Broadley
Anyone else running AMD Epyc (or any other non Intel CPU) and Omni-Path? I've have some AMD Epyc 7451 nodes working, but I went to buy more only to hear that it's not a configuration that the vendor or Intel will support. I've never needed support from Mellanox or Pathscale/Qlogic/Intel for previ

Re: [Beowulf] Slow RAID reads, no errors logged, why?

2018-03-21 Thread David Mathog
On Tue, 20 Mar 2018 00:55:01 + Jörg Saßmannshausen wrote: I am wondering if that is not what you would expect. The long SMART test is quite thorough so the disc will be subject to quite a bit of stress. Thus, it could well be that the controller is slowing down the rest of the RAID as th