Mellanox MHQH19B-XTR for half price

Discussion in 'Great Deals' started by ehorn, Jul 30, 2012.

  1. Patrick

    Patrick Administrator
    Staff Member

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    Great price on the cards. I did a search on the HP 592520-B21 and didn't see any that low unless you OBO'd.

    Would love to see details of that project.
     
    #61
  2. wuffers

    wuffers New Member

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    Aha, they were not bought through eBay and therefore not OBO'd. I might have bought out the supply (12 listed, bought 12), so I'm not too sure if more are available. I don't want to shoot myself in the foot just yet because I may require more, so I'll share once I determine that my needs are met.

    Just a quick summary of the project:
    - Mixed VMware and Hyper-V virtualization environment
    - InfiniBand SAN fabric for a 100TB SAN using ZFS
    - 10GbE networking for hosts

    All on a relatively "tight" budget - all the SAN fabric and networking gear are all used/refurb, saving us a bundle.

    More details later.
     
    #62
  3. mrkrad

    mrkrad Well-Known Member

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    how will this compare to the netgear XS* 10gb 8,12,24 port switches and 10gbase-T ?
     
    #63
  4. cafcwest

    cafcwest Member

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    Inquiring minds would love to know of such a source, if you find that your need has been fulfilled.
     
    #64
  5. gigatexal

    gigatexal I'm here to learn

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    #65
  6. dba

    dba Moderator

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    Wuffers, have you installed your Mellanox switches yet? I could use some advice on connecting to them via serial since I do not have the original DB9 cable.

     
    #66
  7. wuffers

    wuffers New Member

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    Sorry guys, wasn't checking the thread and was away on vacation in Europe last week.

    Aha, yes. I don't need any more for the project and don't mind sharing. The secret was searching for "592520R-B21", notice the R for HP's Renew program.

    Unfortunately, the supplier I got them from no longer has these in stock, but I took all 12 from ACOS:

    [​IMG]

    You may want to try:
    Codemicro
    or
    Mantecho

    but my suspicion is that they all worked from the same inventory pool. The latest prices I can see for refurb dual QDRs now are ~$300 each. Sorry!

    I have all the SAN fabric in (Infiniband) but still no servers, JBODs or drives yet, although I did get my L2ARC SSDs (Smart Optimus 400GB x4). Still trying to figure out best distro to go with but it won't be FreeBSD at all - it'll be an illumos one.

    Yup, got them all installed, tested and flashed latest firmware. It's just a normal null modem serial cable (DB9 F to DB9 F).
     
    #67
  8. cactus

    cactus Moderator

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    I got 2 more '19Bs from ims for $100 each. I didn't try lower.
     
    #68
  9. xnoodle

    xnoodle Active Member

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    Can I connect these to a Intel 82599 based 10gbE card (TCK99 for the C6100) using a QSA<->SFP+ converter and a SFP+ to SFP+ copper cable?
     
    #69
  10. wuffers

    wuffers New Member

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    I'm not going to get into the Infiniband vs 10GbE debate here. They're simply two different beasts depending on what you use it for.

    The Netgear 8 port switch (XS708E should be going for about $1000 street price) with 10GBase-T would make things a lot simpler with cabling (and support for legacy CAT5/6 cabling and NICs) and cost per port is in the "affordable" range, versus their higher end 24 port which should probably go for $6000 street (versus say $8000 for a Brocade or Dell 10GbE switch). I think the issue would be trying to acquire 10GBase-T NICs on the cheap (most older models that are going for around $50 would be CX4 or SFP+ I believe).

    I ended up purchasing two used Dell PowerConnect 8024Fs for the LAN portion of the project, for under $2500 per switch. Close to $100 per port, not factoring in cost of cabling. Add about $20-25 per occupied port (I paid between $40-45 per Cisco SFP+ cable) and that was my 10GbE networking cost.

    I don't see why not. I haven't tried direct connect between the two adapters but currently I have my Intel X520-DA2 (which is a 82599 based controller) connected vis SFP+ to the switch, and a ConnectX-2 VPI card connected via a QSA with SFP+ cable to the same switch. I had issues with getting link to the Infiniband adapter with the QSA and SFP+ cable, but everything just worked after installing the RoCE drivers. I'd have to test again with the Mellanox WinOF drivers as they should work. It wasn't simply "auto-detect" as told to me by a Mellanox sales engineer.

    I can test this out real easily when I'm back in the office.
     
    #70
  11. wuffers

    wuffers New Member

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    Works as expected with a QSA on the IB adapter and SFP+ to SFP+ cable direct connect to the X520-DA2.
     
    #71
  12. xnoodle

    xnoodle Active Member

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    Thanks for checking, wuffers!
     
    #72
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