Peter Enoch

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Everything posted by Peter Enoch

  1. We have about 100 low to medium performance VMware VM's that we want to consolidate from about 15 1 Unit servers to 4 Blade servers. We have bought and tried a Dell PowerEdge VRTX system with 25 Enterprise SSD's, but sadly it seems the controllers in that system cannot perform for all flash solution. We currently also have Dell M1000e Blade system and have 6-8 differently Dell EqualLogic SAN's running. I really would like the storage to perform very fast and thats why we look at a hybrid or all flash solution. From Dell i'm thinking on the Equallogic 6210XS (hybrid SAS / SSD SAN) or the 6210S (All-Flash) Budget is about 100K or less.
  2. Peter Enoch

    VRTX SSD Performance, what to expect?

    Your right latency is also very important. I've run a test now to check the latency. I tested with 16KB blocksize, 16 workers, 16 queues, 70%read, 30%write and 100% random on RAID-50 over 24 disks: 67.939 IOPS and avarage latency 3.77 ms.
  3. Hi everyone, I've just bought a Dell PowerEdge VRTX system 3 weeks ago with 25xToshiba PX04SVB096 harddrives. The system have two PERC8 Shared controllers installed and can be setup in Single or Fault Tolerance Mode. Best results currently is with Single Mode controller, Fault Tolerance Mode has a performance drop (even with "new" firmware)The SSD's should be excellent and it's possible to read more about them here: http://www.tomsitpro.com/articles/toshiba-px04s-sas-ssd,2-905.html?_ga=1.192722346.1078210542.1470492245The Dell PowerEdge VRTX system is brand new and all firmware is up to date. I've one Blade in the VRTX system running on local SSD's which have Windows 2012r2 installed (also tried with VMware with worse result)Dell recommends to set Read Cache Policy to No Read Ahead and it seems to give best result also. Write Cache Policy to Write Through. I see better performance with Write Back Policy!Using I/O Meter directly on the physical server i've done a lot of tests with these setting:0,5K, 16 Outstanding I/O, 100% Read, 100% Random0,5K, 16 Outstanding I/O, 100% Write, 100% RandomVRTX in Single Mode with 24 drives in RAID-50: Read: 79.736 IOPS and Write: 71.494 IOPSVRTX in Fault Tolerance Mode with 24 drives in RAID-50: Read: 43.779 IOPS and Write: 41.580 IOPSDell PowerEdge 730XD with PERC H830 RAID controller with 2x Dell Mix-Use SSD's (other cheaper brand then the Toshiba's) in RAID-1: Read: 102.046 IOPS and Write: 107.691 IOPSOn my own home PC with an "older" Samsung 850 EVO Desktop SSD I get in Read: 82.617 IOPS and Write: 75.317 IOPSI don't think i'm getting the result I should expect from this system, I mean should one Desktop SSD almost beat 24xEnterprise SSD's in RAID-50 or 2xDell SanDisk SSD's in RAID-1 outperform 24xSSD's in RAID-50.Currently have a case open at Dell, but here 3 weeks later we're not getting better results.I need to use this VRTX solution with 4xVMware vSphere servers to run a lot of VM's, so I need to be 100% sure before moving anything to this system.can everyone share what they think or what to test out?Hope to hear from anyone..
  4. Peter Enoch

    VRTX SSD Performance, what to expect?

    Hi, can't remember the latency numbers when testing I've tried with lots of differents numbers in disks for RAID-0, RAID-1, RAID-5, RAID-10, RAID-50 and RAID-6 RAID sets. Havn't seen any big differents in performance. RAID-0 over 24 disks only x2 the RAID-50 numbers. But RAID-0 is a bit risky Again I love the box, but just sad they don't offer a upgraded/highend controller also to this system so it can handle all-flash solution better.
  5. Peter Enoch

    VRTX SSD Performance, what to expect?

    Tried the test from all four VRTX Blades with VMware 6.0. Each blade have then VRTX LUN attached and each Blade have a Windows 2012r2 VM on it. I tried with maybe a more "real-life" performance test with 16 workers, 16 DQL, 65% read, 35% write and 45% random - still on RAID-6 over 24 SSD's 1 Blade with one VM running the IO Meter test: 37.102 IOPS 2 Blades each with one VM running the IO Meter test: 34.883 IOPS combined 3 Blades each with one VM running the IO Meter test: 33.699 IOPS combined 4 Blades each with one VM running the IO Meter test: 32.773 IOPS combined Same test on PowerEdge 730XD with 2xDell Sandisk SSD's in RAID-1: 88.032 IOPS The PE730XD is a physical server so should perform a little better then running in an VM. Again my conclusion is, if buying the VRTX, the controller cannot handle full speed if all-flash only in the storage unit. It's sad that Dell don't have an upgraded controller for this system
  6. Peter Enoch

    VRTX SSD Performance, what to expect?

    I've trought about the same thing (if I understand you correct) I would try to get all 4 Blades installed with Windows 2012r2 on local drives and then connect them all to the same LUN and try to run the same tests. Just to see if the combine speed for all 4 test equals the result I see for now or if we get better combined result. I know RAID6 have a huge write hit, but over 24x drives should it still not be faster than 2 drives in RAID-1? I've also tried with RAID-50 and didn't see any big performance gain.
  7. Peter Enoch

    VRTX SSD Performance, what to expect?

    The result for Read after 3 hours run: 4K 100% Read and 100% random 16 Workers and 16 Disk Queue Lengh on the VRTX storage for 3 hours: 41.272 IOPS (24xDell Toshiba SSD's in RAID-6) 4K 100% Read and 100% random 16 Workers and 16 Disk Queue Lengh on the PowerEdge 730XD for 3 hours: 128.703 IOPS (2xDell SanDisk SSD's in RAID-1
  8. Peter Enoch

    VRTX SSD Performance, what to expect?

    Yes just need to know at which price vSAN licenses will cost
  9. Peter Enoch

    VRTX SSD Performance, what to expect?

    Yes I also had A look at the FX2, but picked the VTRX because we throught it could performe with the SSD's. Hard for us to find the right storage, but it could be vSAN or EQL maybe
  10. Peter Enoch

    VRTX SSD Performance, what to expect?

    Hi Brian, I will try to make new thread about that subject
  11. Peter Enoch

    VRTX SSD Performance, what to expect?

    We can agree on this now But we had no idea that the Shared PERC controller performed SO bad. But IF the controllers was great then this box was ideal for us and new solutions. Any other idea to new solution for us? Currently we think about M630 Blades to our M1000e Bladecenter and then maybe one or two Equallogic PS6210XS or one EqualLogic PS6210S. We just "loved" the idea with one small unit (VRTX) that could handle 4xBlades and shared storage in 5 Unit, but maybe it's not possible with any vendor?
  12. Peter Enoch

    VRTX SSD Performance, what to expect?

    4K 100% Write and 100% random 16 Workers and 16 Disk Queue Lengh on the VRTX storage for 3 hours: 41.290 IOPS (24xDell Toshiba SSD's in RAID-6) 4K 100% Write and 100% random 16 Workers and 16 Disk Queue Lengh on the PowerEdge 730XD for 3 hours: 132.953 IOPS (2xDell SanDisk SSD's in RAID-1) So over 3x better Write performance. I know RAID-6 have worse Write performance, but shouldn't 24x Enterprise drives still beat this? Again I think when I've the time I will drive to our datacenter and take 2xToshiba SSD's to try in the PE730XD system, I think the result will be even better than with the SanDisk drives from Dell. I'm testing the same for read performance now, here RAID-6 should normally perform better. I'll be back
  13. Peter Enoch

    VRTX SSD Performance, what to expect?

    Your right, I think i'll see the same for the 24xSSD in the VRTX vs. the PE730XD with 2xSSD, but i'll test it. But i'll be surprised if the VRTX test showed big increase in IOPS
  14. Peter Enoch

    VRTX SSD Performance, what to expect?

    Hi Kevin, I can do that, but the tests I see from other reviews almost shows the same and that is that the performance over longer time stays very steady or is there something I miss? I think your right about the NVMe storage, but we didn't look that way because that will mean "fixed" storage for each Blade (if one PCIe is mapped to each server) Just sad to see that this system can't handle SSD or high load.
  15. Peter Enoch

    VRTX SSD Performance, what to expect?

    Correct, but how to test differently? I can't move all the workload before i'm pretty sure it will perform fast. I've testet with 3 VM's and it was running OK, but not lightning fast which we expected. I know test isn't real world, but still if i'm already on 2xSSD's on PE730XD sees 4x performance then I don't think we should be satisfied with the current numbers we see from the VRTX system. Again remember that Fault Tolerance mode on the VRTX decreases performance even more then what I've wrote. I hope to test 2xToshiba SSD's in the PE730XD, just to see if they outperforms the current 2xDell SSD's (SanDisk) in the PE730XD
  16. Peter Enoch

    VRTX SSD Performance, what to expect?

    The goal is to run abort 100 medium load VM's on this system. But i'm a little bit worried it Will not handle the load. still dosn't understand that it seems to underperform so much.
  17. Peter Enoch

    VRTX SSD Performance, what to expect?

    But for a system which only runs an IO Meter test to find out what the system can offer, how should very long test really do any different? For me in the tests I've done, it's very steady from the start and dosn't really changes over time. In the test of the Toshiba SSD from http://www.tomsitpro.com/articles/toshiba-px04s-sas-ssd,2-905-3.html it also seems to be very steady.
  18. Peter Enoch

    VRTX SSD Performance, what to expect?

    I've tried up to 15 min. I'm unsure what you mean about preconditioned?
  19. Peter Enoch

    VRTX SSD Performance, what to expect?

    I'm sure your right, it's just sad that the controller in the VRTX isn't better then what we see I could live with performance under high end systems, but it's hard to see 2xSSD's in RAID-1 beat 24xEnterprise SSD's in the VRTX Even more when the controllers is in Fault Tolerance mode it's worse..
  20. Peter Enoch

    VRTX SSD Performance, what to expect?

    For information the RAID controller in the Dell PowerEdge 730XD is a PERC H830 Maybe it's true that we should not expect high performance from the VRTX, but I would have expected Dell to say something before we said OK to buy and it's pretty hard to explain why 2xDell SSD's (which i'm sure is not as good as the Toshiba SSD's) in and PowerEdge 730XD currently outperforms the VRTX system with 24xSSD with 4x. The PowerEdge 730XD with PERC H830 I would not call Enterprise either..
  21. Peter Enoch

    VRTX SSD Performance, what to expect?

    I've tested Write-Back vs. Write Through lots of times and I havn't one time got better Write performance results with Write Through, only Read will sometimes be faster, maybe because the controller supported FastPath. The Desktop SSD is in my own Dell PC so the test is from that system. This system was chosen to run VMware vSphere VM's and the idea was to have more VRTX systems so we where not so valuable for disaster - one box could be done but other VRTX systems was still in production. We currently have M1000e Blade Centers fra Dell and Equallogic SAN's, but we "fear" if the M1000e goes down everything is stopped. If one Equallogic SAN in a group with data spread over more members, all data on these volumes is down. Currently the one server connected in the VRTX is running physical Windows 2012r2 server.
  22. Peter Enoch

    VRTX SSD Performance, what to expect?

    For test I only have one LUN and this is only connected to one server which don't have any load. And for information same test on 2xSanDisk Dell SSD's in PowerEdge 730XD in RAID-1: The result for 4K with 100% random: Read 100%: 132.021 IOPS Write 100%: 133.699 IOPS The result for 128K with 100% random: Read 100%: 43.820 IOPS Write 100% 53.136 IOPS
  23. Peter Enoch

    VRTX SSD Performance, what to expect?

    And for information same test on 2xSanDisk Dell SSD's in PowerEdge 730XD in RAID-1: The result for 4K with 100% random: Read 100%: 132.021 IOPS Write 100%: 133.699 IOPS The result for 128K with 100% random: Read 100%: 43.820 IOPS Write 100% 53.136 IOPS
  24. Peter Enoch

    VRTX SSD Performance, what to expect?

    The test is done because Dell told me to do with these settings. The 4K test have already been done, but I've now testet with 16 workers and 16 queue each with 4K and 128K transfer sizes. The result for 4K with 100% random: Home PC with Samsung EVO 850 SSD Read 100%: 55.231 IOPS Home PC with Samsung EVO 850 SSD Write 100% 46.336 IOPS VRTX with RAID-6 over 24 SSD's Read 100%: 45.073 IOPS VRTX with RAID-6 over 24 SSD's Write 100%: 43.273 IOPS The result for 128K with 100% random: Home PC with Samsung EVO 850 SSD Read 100%: 4.324 IOPS Home PC with Samsung EVO 850 SSD Write 100% 1.909 IOPS VRTX with RAID-6 over 24 SSD's Read 100%: 14.224 IOPS VRTX with RAID-6 over 24 SSD's Write 100%: 14.369 IOPS Currently VRTX is in single controller mode and with No Read Ahead Read Cache Policy and Write Back in Write Cache Policy. In the 128K with 100% random I see differents, but again 24x Enterprise SSD's vs. one single Desktop SSD.