On Thu, Jul 16, 2009 at 21:30, Rob Logan<r...@logan.com> wrote:
>> c4 scsi-bus connected configured
>> unknown
>> c4::dsk/c4t15d0 disk connected configured
>> unknown
> :
>> c4::dsk/c4t33d0 disk connected configured
>> unknown
>> c4::es/ses0 ESI connected configured
>> unknown
>
> thanks! so SATA disks show up JBOD in IT mode.. Is there some magic that
> load balances the 4 SAS ports as this shows up as one "scsi-bus"?
Hypothetically, yes. In practical terms, though, I've seen more than
300 MB/s of I/O over it:
capacity operations bandwidth
pool used avail read write read write
----------- ----- ----- ----- ----- ----- -----
data1 1.06T 1.21T 1 1.61K 2.49K 200M
mirror 460G 236G 0 522 1.15K 63.8M
c4t18d0 - - 0 518 6.38K 63.6M
c4t21d0 - - 0 518 12.8K 63.8M
mirror 467G 229G 0 533 306 64.8M
c4t23d0 - - 0 523 6.38K 64.3M
c4t25d0 - - 0 529 0 65.0M
mirror 153G 775G 0 597 1.05K 71.8M
c4t20d0 - - 0 589 12.8K 72.5M
c4t22d0 - - 0 584 0 71.8M
----------- ----- ----- ----- ----- ----- -----
Note that the pool is only doing 200 MB/s, but the individual devices
are doing a total of 400 MB/s. It's not possible to put more than 300
MB/s into or out of a single device, so there's no "link aggregation"
to worry about.
Will
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