[pve-devel] some infos of benefits of new built-in iscsi initiator

Alexandre DERUMIER aderumier at odiso.com
Wed Dec 7 12:39:51 CET 2011


http://lists.gnu.org/archive/html/qemu-devel/2011-04/msg01977.html


A built in iSCSI initiator has many benefits
* the LUNs used are local to the guest and are not exposed to the host, nor any 
of the processes running on the host.
* it provides very high performance out-of-the-box, compared to open-iscsi
that requires several special flags to iscsi to match libiscsi
* it avoids cache trashing and having two copies of the same data, once in the 
hosts cache and a second copy in the guest. I.e. O_DIRECT like behaviour.
* management of LUNs are much easier for high-end or enterprise users with
very many iscsi devices. You no longer need to expose many hundreds of devices
to the local host and have them pollute the caches.

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