On 05/26/2010 09:52 PM, Vladislav Bolkhovitin wrote:
> Boaz Harrosh, on 05/26/2010 10:45 PM wrote:
>> On 05/26/2010 09:42 PM, Vladislav Bolkhovitin wrote:
>>> Taylor, on 05/26/2010 09:32 PM wrote:
>>>> I'm curious what kind of performance numbers people can get from their
>>>> iscsi setup, specifically via 10 Gig.
>>>>
>>>> We are running with Linux servers connected to Dell Equallogic 10 Gig
>>>> arrays on Suse.
>>>>
>>>> Recently we were running under SLES 11, and with multipath were seeing
>>>> about 2.5 Gig per NIC, or 5.0 Gbit/sec total IO throughput, but we
>>>> were getting a large number of iscsi connection errors.  We are using
>>>> 10 Gig NICs with jumbo frames.
>>>>
>>>> We reimaged the server to OpenSuse, same hardware and configs
>>>> otherwise, and since then we are getting about half, or 1.2 to 1.3
>>>> Gbit per NIC, or 2.5 to 3.0 Gbit total IO throughput, but we've not
>>>> had any iscsi connection errors.
>>>>
>>>> What are other people seeing?  Doesn't need to be an equallogic, just
>>>> any 10 Gig connection to an iscsi array and single host throughput
>>>> numbers.
>>> ISCSI-SCST/open-iscsi on a decent hardware can fully saturate 10GbE 
>>> link. On writes even with a single stream, i.e. something like a single 
>>> dd writing data to a single device.
>>>
>>
>> Off topic question:
>> That's a fast disk. A sata HD? the best I got for single sata was like
>> 90 MB/s. Did you mean a RAM device of sorts.
> 
> The single stream data were both from a SAS RAID and RAMFS. The 
> multi-stream data were from RAMFS, because I don't have any reports 
> about any tests of iSCSI-SCST on fast enough SSDs.
> 

Right thanks. So the SAS RAID had what? like 12-15 spindles?

> Vlad
> 

Boaz

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