> > Niels de Carpentier wrote: >> >> Unfortunately, this doesn't always work. Sometimes the OS will report >> filesystem errors and mount the fs read-only. A short time later the >> iscsi >> targets will be reconnected, but the filesystem is already read-only by >> then. >> >> The logs show (default iscsi transport 724 was used for this test): > > Could you send the parts of the log before the fs errors? We want to see > how many conn errors there were and when they occured and when the > replacement/recovery timeout fired.
These were actually the first error messages for that test. The I/O errors happen almost instantly, and it takes almost 10 seconds after that to detect the actual connection error. (After which it almost immediately reconnects). Possibly this has something to do with the way I do the switchover? (Remove virtual IP address from one server and add it to the other.) > > Could you also run > iscsiadm -m node -T target -p ip:port > for the root target and send the output? #iscsiadm -m node -T iqn.2007-11.com.smys:storage.front003 -p 10.40.99.1:3260 iscsiadm: Config file line 47 too long. node.name = iqn.2007-11.com.smys:storage.front003 node.tpgt = 1 node.startup = manual iface.hwaddress = default iface.iscsi_ifacename = default iface.net_ifacename = default iface.transport_name = tcp node.discovery_address = 10.40.99.1 node.discovery_port = 3260 node.discovery_type = send_targets node.session.initial_cmdsn = 0 node.session.initial_login_retry_max = 4 node.session.cmds_max = 32 node.session.queue_depth = 32 node.session.auth.authmethod = CHAP node.session.auth.username = frontend node.session.auth.password = ******** node.session.auth.username_in = <empty> node.session.auth.password_in = <empty> node.session.timeo.replacement_timeout = 86400 node.session.err_timeo.abort_timeout = 15 node.session.err_timeo.lu_reset_timeout = 30 node.session.err_timeo.host_reset_timeout = 60 node.session.iscsi.FastAbort = Yes node.session.iscsi.InitialR2T = No node.session.iscsi.ImmediateData = Yes node.session.iscsi.FirstBurstLength = 262144 node.session.iscsi.MaxBurstLength = 16776192 node.session.iscsi.DefaultTime2Retain = 0 node.session.iscsi.DefaultTime2Wait = 2 node.session.iscsi.MaxConnections = 1 node.session.iscsi.MaxOutstandingR2T = 1 node.session.iscsi.ERL = 0 node.conn[0].address = 10.40.99.1 node.conn[0].port = 3260 node.conn[0].startup = manual node.conn[0].tcp.window_size = 524288 node.conn[0].tcp.type_of_service = 0 node.conn[0].timeo.logout_timeout = 15 node.conn[0].timeo.login_timeout = 30 node.conn[0].timeo.auth_timeout = 45 node.conn[0].timeo.noop_out_interval = 0 node.conn[0].timeo.noop_out_timeout = 0 node.conn[0].iscsi.MaxRecvDataSegmentLength = 131072 node.conn[0].iscsi.HeaderDigest = None,CRC32C node.conn[0].iscsi.DataDigest = None node.conn[0].iscsi.IFMarker = No node.conn[0].iscsi.OFMarker = No Some values have changed since the log I send you: node.session.cmds_max 128 -> 32 node.session.iscsi.InitialR2T Yes -> No DefaultTime2Retain 20 -> 86400 DefaultTime2Wait 2 -> 10 > > And could you run > > cat /sys/class/iscsi_session/session1/recovery_tmo > > (session1 is the session for the root disk right. If not replace the one > with whatever number it is). > > and send that outpout? #cat /sys/class/iscsi_session/session1/recovery_tmo 86400 > >> Apr 21 11:35:40 front003 iscsid: connection1:0 is operational after >> recovery (1 attempts) >> > > This is weird, because it only took one recovery attempt, so it looks > like it was a really short outage and should have been back within the > replacement you set. The outage is probably 15-20 seconds, while the target is switched over to another server. The actual reconnect is to another identically configured server/target. The weird thing is the timeline: 11:35:25 I/O errors 11:35:36 connection error detected 11:35:40 reconnected Niels --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
