[OpenIndiana-discuss] ISCSI SSD Performance

[Ian Collins]

Ian Collins wrote:
> Sašo Kiselkov wrote:
>> On 02/16/2013 11:58 PM, Sašo Kiselkov wrote:
>>> On 02/16/2013 11:37 PM, Ian Collins wrote:
>>>> Have you tried the connecting to the volume form another IO host to
>>>> eliminate vmware as the cause?
>>> Second that.
>>>
>>> The 9k MTU might also be hitting some NIC driver bugs - non-standard
>>> settings can, at times. Since the difference is only in the storage ->
>>> VMware direction, I suspect there may be some trouble there (perhaps
>>> VMware not being entirely okay with how OI is handling the 9k MTUs?).
>> One more thing comes to mind: if all else fails, try to disable flow
>> control. Sometimes it can mess up throughput, if the receiving NIC
>> erratically sends too many TX frames - can be a driver issue in VMware,
>> though this is quite a long stretch.
>>
>> Anyway, right now I suspect VMware might be the culprit here. The number
>> of kittens that have to be slaughtered to get such a high packet
>> switching performance from VMs to storage is astounding.
> Which is one reason the visualised world should be using SmartOS!
>
Virtualised :)

-- 
Ian.