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On 07/03/2017 12:24 AM, J. Roeleveld wrote: |
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> On July 2, 2017 7:36:02 PM GMT+02:00, "Taiidan@×××.com" <Taiidan@×××.com> wrote: |
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>> On 07/02/2017 02:51 AM, J. Roeleveld wrote: |
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>> |
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>>> On July 1, 2017 11:23:06 PM GMT+02:00, "Taiidan@×××.com" |
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>> <Taiidan@×××.com> wrote: |
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>>>> I am wondering if anyone has tried this, apparently several LSI |
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>>>> controllers support portioning out drives to VF's so the guest sees |
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>> a |
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>>>> controller with those drives attached to it. |
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>>>> |
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>>>> What was your experience like? and what controllers did you use? |
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>>>> |
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>>>> |
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>>>> - Thanks |
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>>> I am wondering when I would want this? |
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>> So you only need one HBA/RAID card per system if you want more than one |
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>> |
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>> VM with quality performance. |
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>> It'll always be faster than an emulated disk. |
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> Never noticed any performance issues. Using Xen and raw disk format to the VMs. |
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http://semiaccurate.com/2009/09/30/lsi-virtualizes-storage-hardware/ |
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For me I have 3/4 the native copy speed, and the I/O for example |
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extracting a zip is terrible. |
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> |
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>>> Either the VM needs a fraction of a single disk. Or it needs multiple |
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>> disks. |
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>>> For the latter case, I prefer to pass an entire HBA. |
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>> Which one do you have and does yours support FLR? |
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> Using a Supermicro card based on a LSI3008 chipset and dual expander backplane. |
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> I can always add a second HBA of I need more bandwidth. |
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> |
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> What is FLR? Googling that gives me a lot of non IT related results. |
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Function level reset, it is required to be able to assign devices to |
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VM's without annoyance. |
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The 3K series supports SR-IOV so you probably have it. |
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|
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Could you run # lspci -vv? |
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Thank you |
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