I got a question regarding thoses messages on a multipathed iscsi initiator (using an IET target) :
My "multipath -ll" output shows weird active paths and is changing, what should I tune ?
Fri Aug 19 10:27:36 CEST 2011
mpath1 (149455400000000006c6670772e62616c7300000000000000) dm-5 IET,VIRTUAL-DISK
[size=3.1T][features=0][hwhandler=0]
\_ round-robin 0 [prio=1][active]
\_ 7:0:0:0 sdd 8:48 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 8:0:0:0 sde 8:64 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 10:0:0:0 sdg 8:96 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 12:0:0:0 sdi 8:128 [active][ready]
mpath2 (149455400000000006c6670772e636f6e6600000000000000) dm-4 IET,VIRTUAL-DISK
[size=100G][features=0][hwhandler=0]
\_ round-robin 0 [prio=1][active]
\_ 5:0:0:0 sdb 8:16 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 6:0:0:0 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 9:0:0:0 sdf 8:80 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 11:0:0:0 sdh 8:112 [active][ready]
Fri Aug 19 10:28:04 CEST 2011
mpath1 (149455400000000006c6670772e62616c7300000000000000) dm-5 IET,VIRTUAL-DISK
[size=3.1T][features=0][hwhandler=0]
\_ round-robin 0 [prio=1][active]
\_ 7:0:0:0 sdd 8:48 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 8:0:0:0 sde 8:64 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 10:0:0:0 sdg 8:96 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 12:0:0:0 sdi 8:128 [active][ready]
mpath2 (149455400000000006c6670772e636f6e6600000000000000) dm-4 IET,VIRTUAL-DISK
[size=100G][features=0][hwhandler=0]
\_ round-robin 0 [prio=1][enabled]
\_ 5:0:0:0 sdb 8:16 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 6:0:0:0 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 9:0:0:0 sdf 8:80 [active][ready]
\_ round-robin 0 [prio=1][enabled]
\_ 11:0:0:0 sdh 8:112 [active][ready]
node.startup = manual
node.session.timeo.replacement_timeout = 5
node.conn[0].timeo.login_timeout = 5
node.conn[0].timeo.logout_timeout = 15
node.conn[0].timeo.noop_out_interval = 5
node.conn[0].timeo.noop_out_timeout = 15
node.session.err_timeo.abort_timeout = 15
node.session.err_timeo.lu_reset_timeout = 20
node.session.initial_login_retry_max = 8
node.session.cmds_max = 128
node.session.queue_depth = 32
node.session.iscsi.InitialR2T = No
node.session.iscsi.ImmediateData = Yes
node.session.iscsi.FirstBurstLength = 262144
node.session.iscsi.MaxBurstLength = 16776192
node.conn[0].iscsi.MaxRecvDataSegmentLength = 131072
discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768
node.session.iscsi.FastAbort = Yes