Hello Mike On 12 mar, 02:54, Mike Christie <micha...@cs.wisc.edu> 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. > > 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 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 open-iscsi+unsubscr...@googlegroups.com. > > To post to this group, send email to open-iscsi@googlegroups.com. > > 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 open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at http://groups.google.com/group/open-iscsi?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
