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!
--
Ian.
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