[ovirt-users] Re: need network design advice for iSCSI
Shani,
Can you help here with iSCSI bonding?
Thanks
On Mon, Jan 21, 2019 at 7:51 AM Uwe Laverenz <uwe(a)laverenz.de> wrote:
>
> Hi John,
>
> Am 20.01.19 um 18:32 schrieb John Florian:
>
> > As for how to get there, whatever exactly that might look like, I'm also
> > having troubles figuring that out. I figured I would transform the
> > setup described below into one where each host has:
> >
> > * 2 NICs bonded with LACP for my ovirtmgmt and "main" net
> > * 1 NIC for my 1st storage net
> > * 1 NIC for my 2nd storage net
>
> This is exactly the setup I use. I have run this successfully with
> CentOS/LIO and FreeNAS iSCSI targets with good performance.
>
> In short:
>
> - 2 separate, isolated networks for iSCSI with dedicated adapters
> on hosts and iSCSI target
> - jumbo frames enabled
> - no VLANs config needed on hosts, untagged VLANs on switch
> - do _not_ use LACP, let multipathd handle failovers
>
> Same experience as Vinicius: what did _not_ work for me is the
> iSCSI-Bonding in OVirt. It seems to require that all storage IPs are
> reachable from all other IPs, which is not the case in every setup.
>
> To get multipathing to work I use multipath directly:
>
> > https://www.mail-archive.com/users@ovirt.org/msg42735.html
>
> I will post a bonnie++ result later. If you need more details please let
> me know.
>
> cu,
> Uwe
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