The write cache changes in build 115 apply only to COMSTAR, not to
iscsitgtd, so the iscsitadm command you ran will not have any effect.
To get the changes you can either image-update from the opensolaris dev
repository (latest is still build 111 there but I presume the newer
builds will be available soon now that 2009.06 is released) or wait for
the next stable release (2010.??).
-Peter
Macer User wrote:
Thank for answering, but...
Doing this makes no difference at all. The iSCSI target (osol0906) performance
is still as bad (and useless) after doing this:
2). All current ZVOL backed iSCSI LUs
# iscsitadm modify admin --fast-write-ack enable
# zfs set shareiscsi=off <pool-name/zfs-pathname>
# zfs set shareiscsi=on <pool-name/zfs-pathname>
Any other suggestions?
We can't be the only ones experiencing this since it's the same on every
osol0906 installation we have regardless of what hardware we install it on and
it works with osol0811.
Or does no one else try to use iSCSI with osol0906?
In short, this is exactly what we do:
1. fresh install of osol0906
2. install SUNWiscsitgt and SUNWiscsi
3. zfs create rpool/iscsi
4. zfs create -V 100g rpool/iscsi/vol_01
5. zfs shareiscsi=on rpool/iscsi/vol_01
And the connect to the iSCSI target and start copying a 10g large file to it.
This gives us a performance of about 4mb/sec
Doing the exact same thing but with osol0811 gives us a performance of about
45mb/sec.
Either we are missing something very basic here or else everyone must
experience the same thing. A useless iSCSI target...
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