We have a SLES 11 server connected to an Equallogic 10 Gig disk array. Initially everything seemed to work just fine. When doing some IO testing against the mounted volumes, in which we cause very high IO loads, i.e. 95 to 100% as reported by iostat, we started seeing the following messages in /var/log/messages:
May 21 14:26:20 hostA kernel: connection27:0: ping timeout of 5 secs expired, last rx 4426024362, last ping 4426025612, now 4426026862 May 21 14:26:20 hostA kernel: connection27:0: detected conn error (1011) May 21 14:26:21 hostA iscsid: Kernel reported iSCSI connection 27:0 error (1011) state (3) May 21 14:27:03 hostA kernel: connection30:0: detected conn error (1011) May 21 14:27:26 hostA iscsid: Target requests logout within 3 seconds for connection May 21 14:27:26 hostA iscsid: Target dropping connection 0, reconnect min 2 max 0 May 21 14:27:26 hostA iscsid: Kernel reported iSCSI connection 30:0 error (1011) state (4) May 21 14:27:38 hostA kernel: connection25:0: detected conn error (1011) May 21 14:27:39 hostA iscsid: Kernel reported iSCSI connection 21:0 error (1011) state (3) May 21 14:27:39 hostA iscsid: Kernel reported iSCSI connection 25:0 error (1011) state (3) May 21 14:28:16 hostA iscsid: connection27:0 is operational after recovery (3 attempts) May 21 14:28:20 hostA iscsid: connection21:0 is operational after recovery (2 attempts) So far we've turned on flow control on the network switches, tried adjusting multipath.conf, turned off offload parameters on the iscsi NICs, and adjusting iscsid.conf timeouts. We are running a 2.6.27 kernel with open-iscsi 2.0.870-26.5. Does anyone have any suggestions on how we can avoide these timeouts and connection errors? -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-is...@googlegroups.com. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.
