On 2016-05-12 21:02, Wei Liu wrote:
Hi Steven
On Mon, May 09, 2016 at 02:22:48PM +1000, Steven Haigh wrote:
On 2016-05-05 15:52, Steven Haigh wrote:
>On 2016-05-05 12:32, Steven Haigh wrote:
>>Overview
>>
>>If you're using iSCSI, you can mount a target by multiple Dom0
>>machines on the same target. For non-cluster aware filesystems, this
>>can lead to disk corruption and general bad times by all. The iSCSI
>>protocol allows the use of persistent reservations as per the SCSI
>>disk spec. Low level SCSI commands for locking are handled by the
>>sg_persist program (bundled with sg3_utils package in EL).
>>
>>The aim of this patch is to create a 'locktarget=y' option specified
>>within the disk 'target' command for iSCSI to lock the target in
>>exclusive mode on VM start with a key generated from the local systems
>>IP, and release this lock on the shutdown of the DomU.
>>
>>Example Config:
>>disk =
>>['script=block-iscsi,vdev=xvda,target=iqn=iqn.1986-03.com.sun:02:mytarget,portal=iscsi.example.com,locktarget=y']
You seem to suggest an extension (locktarget) to disk spec as well but
you patch doesn't contain modification to
docs/txt/misc/xl-disk-configuration.txt.
Correct. There is no documentation for the existing block-iscsi script
within xl-disk-configuration.txt.
In fact, there is no mention at all regarding block-iscsi in any of the
documentation that I can see.
--
Steven Haigh
Email: net...@crc.id.au
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
