If there is no I/O, LU offline should be instantaneous. Looks like either there
is some pending I/O or you are running into a bug.
One thing to check is the kernel thread list. Run mdb -k (during those 20
seconds) and type $<threadlist <enter>
This will produce a long output. Maybe you can post it here or attach it and
post a link.
Sumit
________________________________________
From: storage-discuss-boun...@opensolaris.org
[storage-discuss-boun...@opensolaris.org] On Behalf Of Steffen Plotner
[swplot...@amherst.edu]
Sent: Wednesday, December 16, 2009 8:12 AM
To: storage-discuss@opensolaris.org
Subject: [storage-discuss] Offlining a LU timing
Hello,
If a LU is in use and one attempts to offline it using:
stmfadm offline-lu 600144F048BF490000004B2172E10006
I have noticed that the status of the LU remains in a "offlining" state for
sometimes at least 20 seconds.
LU Name: 600144F048BF490000004B2172E10006
Operational Status: Offlining
After 20 seconds have passed the state changes from offlining to offline.
What can be done to reduce the 20 seconds to say 1 or 2 seconds?
I have already blocked IO from the initiator by removing the iscsi network
interfaces on the comstar side which means to me that no further traffic is
reaching the target at the time of offlining the LU.
Steffen
_______________________________________________________________________________________________
Steffen Plotner Amherst College Tel (413)
542-2348
Systems/Network Administrator/Programmer PO BOX 5000 Fax (413)
542-2626
Systems & Networking Amherst, MA 01002-5000
swplot...@amherst.edu
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