Hello, We 3 Lenovo DSSG "Building Blocks" as they call them - 2x GNR server pairs.
We've just upgraded the 1st of them from 3.2a (GPFS 5.1.1.0) to 4.3a (5.1.5.1 efix 20). Now the older systems can't communicated with the newer in certain circumstances, specifically querying recovery groups hosted on other servers. It works old->old, new->old and new->new but not old->new. If fairly sure it is not a TCP comms problem. I can ssh between the node as root and as the GPFS sudoUser. Port 1191 and the tscCmdPortRange are open and accessible in both direction between the nodes. There are connections present between the nodes in netstat and in mmfsd.latest.log. No pending message (to that node) in mmdiag --network. In these examples rds-er-dssg01/2 are upgraded, rds-pg-dssg01/2 are downlevel: [root@rds-er-dssg01 ~]# mmvdisk pdisk list --rg rds_er_dssg02 --not-ok # New to new mmvdisk: All pdisks of recovery group 'rds_er_dssg02' are ok. [root@rds-er-dssg01 ~]# mmvdisk pdisk list --rg rds_pg_dssg02 --not-ok # New to old mmvdisk: All pdisks of recovery group 'rds_pg_dssg02' are ok. [root@rds-er-dssg01 ~]# [root@rds-pg-dssg01 ~]# mmvdisk pdisk list --rg rds_pg_dssg02 --not-ok # Old to old mmvdisk: All pdisks of recovery group 'rds_pg_dssg02' are ok. [root@rds-pg-dssg01 ~]# mmvdisk pdisk list --rg rds_er_dssg02 --not-ok # Old to new [HANGS] ^Cmmvdisk: Command failed. Examine previous error messages to determine cause. [root@rds-pg-dssg01 ~]# Has anyone come across this? mmvdisk should work across slightly different versions of 5.1, right? No recovery group, cluster or filesystem versions have been changed yet. We will also log a ticket with snaps and more info but wondered if anyone had seen this. And while this particular command is not a major issue, we don't know what else it may affect, before we proceed with the reset of the cluster. Many thanks, Luke -- Luke Sudbery Principal Engineer (HPC and Storage). Architecture, Infrastructure and Systems Advanced Research Computing, IT Services Room 132, Computer Centre G5, Elms Road Please note I don't work on Monday.
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