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

Dietmar Maurer dietmar at proxmox.com
Thu Dec 8 06:42:55 CET 2011

> 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.

That is also a major drawback, because I can't do backup/restore

> * it provides very high performance out-of-the-box, compared to open-iscsi that
> requires several special flags to iscsi to match libiscsi

I guess there is a reason why open-iscsi does not set those flags by default?

> * 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.

We already use O_DIRECT (cache=none), so what is the difference?

- Dietmar

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