Le mardi 12 mars 2013 23:30:47 UTC+1, Mike Christie a écrit : > > On 03/12/2013 08:11 AM, Guillaume wrote: > > Hello Mike > > > > On 12 mar, 02:54, Mike Christie <[email protected]> wrote: > >> On 03/09/2013 05:58 AM, Guillaume wrote: > >> > >>> Hello, > >> > >>> I have a virtual tape library and a iscsi SAN. All have multiple > >>> ethernet interfaces, This will ressult in multiples sessions to the > >>> targets.So I wonder if I must use dm-multipath or not ? Does the > current > >> > >> Does the device show up as a tape device or a block device? > >> > > > > The VTL device emulates robotics, LTO cartridges and LTO5 tape drives. > > The SAN is a block device. > > Are you using SCST or TGT or LIO for this? >
I don't know about the backend of the VTL. It's a HP D2D appliance. I only have acces to the frontend and my servers. > > > > >>> iscsi layer handle the multiple paths to an iqn or not ? > >> > >>> Another question about the output of "iscsiadm -m session" : the lines > >>> of output begins by @IP:3260,n where n is an integer. Is this number > a > >>> priority level in some way, or does it only distinguish multiple > >>> sessions to the same iqn ? > >> > >> It is the iSCSI target portal group number. It is assigned by the > >> target. You can use it to group portals together. If the initiator and > >> target supports MC/s you could then do a iSCSI level multipathing > called > >> MC/s over portals with the same target portal group number. open-iscsi > >> does not support MC/s > >> > >> > > > > So what I understand is that I must use md-multipath to handle the > > Use dm-multipath. md-multipath is older and does not have as many > features. > > ok. > > multiple path to the targets and give applications a unique path to > > the tape or block devices. My storages systems support MC/S but my > > linux boxes won't. > > > >> > >> > >> > >> > >> > >> > >> > >>> Regards, > >>> Guillaume > >> > >>> -- > >>> You received this message because you are subscribed to the Google > >>> Groups "open-iscsi" group. > >>> To unsubscribe from this group and stop receiving emails from it, send > >>> an email to [email protected] <javascript:>. > >>> To post to this group, send email to > >>> [email protected]<javascript:>. > > >>> Visit this group athttp://groups.google.com/group/open-iscsi?hl=en. > >>> For more options, visithttps://groups.google.com/groups/opt_out. > > > > -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/open-iscsi?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
