On 06/25/2015 11:31 PM, LSZhu wrote:
I have been working for iSCSI in SUSE for half a year, I have some basic
knowledge of iSCSI. I did some debug and performance analyze work
before.I am quite interested in iSCSI-mq, I am not a expert here, but
may I do some contributions for iSCSI-mq? If you need me in somewhere,
please let me know.
In my view, there seems such works need to be done:
(1) open-iscsi should simulate a multi-queue block device on the
initiator side, I mean, /dev/sdc, sdd which simulated by open-iscsi
should be multi-queue, just like we want a multi-queue hardware device
as a backstore.
(2) I/O scheduler is needed in the block layer for multi-queue, for the
simulated device mentioned above.
(3) open-iscsi should establish more than one connections to the target
in a session, and a I/O scheduler is needed here.
(4) some performance improve work like how to manage multi-queue threads
on multiple CPU cores, how to reduce latency, how to create a better
pipeline.
I have heard that on the target LIO side, multi-queue work is done.
If I am wrong somewhere, please tell me, I would appreciate for that.
I know you have did a lot of work for multi-queue, so if you need me
somewhere, or I can help in some work, please let me know.
Hello Zhu,
The most recent discussion about this topic I am aware of can be found
at http://thread.gmane.org/gmane.linux.scsi/98199. Please note that I'm
not an iSCSI expert.
Bart.
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