Asif Iqbal wrote:
> I have the following layout
>
> A 490 with 8 1.8Ghz and 16G mem. 6 6140s with 2 FC controllers using
> A1 anfd B1 controller port 4Gbps speed.
> Each controller has 2G NVRAM
>
> On 6140s I setup raid0 lun per SAS disks with 16K segment size.
>
> On 490 I created a zpool with 8 4+1 raidz1s
>
> I am getting zpool IO of only 125MB/s with zfs:zfs_nocacheflush = 1 in
> /etc/system
>
> Is there a way I can improve the performance. I like to get 1GB/sec IO.
>
I don't believe a V490 is capable of driving 1 GByte/s of I/O.
The V490 has two schizos and the schizo is not a full speed
bridge. For more information see Section 1.2 of:
http://www.sun.com/processors/manuals/External_Schizo_PRM.pdf
-- richard
> Currently each lun is setup as primary A1 and secondary B1 or vice versa
>
> I also have write cache eanble according to CAM
>
>
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