topic When one node of the OpenVMS cluster shutdown, other cluster node also fail to work. in Operating System - OpenVMS

When one node of the OpenVMS cluster shutdown, other cluster node also fail to work.

albert000 — Mon, 19 Sep 2016 02:03:26 GMT

Dear all: I have configured a 2-nodes OpenVMS cluster as follows: $ SH CLUSTER View of Cluster from system ID 1025 node: HWNOD1 19-SEP-2016 09:30:47 +-----------------------+---------+ | SYSTEMS | MEMBERS | +--------+--------------+---------+ | NODE | SOFTWARE | STATUS | +--------+--------------+---------+ | HWNOD1 | VMS V8.4 | MEMBER | | HWNOD2 | VMS V8.4 | MEMBER | +--------+--------------+---------+ For HWNOD1, it uses a san storage as system disk. For HWNOD2, it use local disk as system disk. When the cluster starts up, the disk information shows as follows: $ SH DEV D Device Device Error Volume Free Trans Mnt Name Status Count Label Blocks Count Cnt $1$DGA1: (HWNOD1) Mounted 0 HWNOD1 153011360 358 1 $1$DGA2: (HWNOD1) Online 0 $1$DGA3: (HWNOD1) Online 0 $1$DGA8: (HWNOD1) Online 0 $1$DGA9: (HWNOD1) Online 0 $1$DGA23: (HWNOD1) Online 0 $5$DKA100: (HWNOD1) Online 0 $5$DKA200: (HWNOD1) Mounted 0 (remote mount) 1 $5$DNA0: (HWNOD1) Offline 0 $5$DNA1: (HWNOD1) Online wrtlck 0 $1$DGA1 is the system disk. $1$DGA3 is the quorum disk. However each time when I shutdown one cluster node, the other node will fails to response any command. It will hangs any command I have entered until the shutdowned node starts up again. Could you tell me how to solve this problem? BR TONG

Re: When one node of the OpenVMS cluster shutdown, other cluster node also fail to work.

Dennis Handly — Mon, 19 Sep 2016 02:50:05 GMT

Please use Post Options (on right) > Edit Reply to clean up your post and format it better, so it can be read.

Re: When one node of the OpenVMS cluster shutdown, other cluster node also fail to work.

abrsvc — Mon, 19 Sep 2016 12:44:52 GMT

With both systems running, use the SHOW CLUSTER/CONTINUOUS command.

WIth the display working, type: ADD VOTES

What you will see is that the cluster wants 2 votes to work and each node contributes 1 vote. Shutting down one node will result in a total vote count of 1 hwhich is not enough for the cluster to work. You need to add a quorum disk. See the cluster configuration documentation for how to do this.

Dan

Re: When one node of the OpenVMS cluster shutdown, other cluster node also fail to work.

albert000 — Wed, 21 Sep 2016 01:28:42 GMT

Dear Dan:

Thanks very much for your reply.

I open a new case in this links:

/t5/System-Management/cluster-node-hangs-when-another-node-shutdown/m-p/6899759

I have added a quorum disk in the cluster. and the expected_vote is set to 2.

EXPECTED_VOTES 2 1 1 127 Votes
VOTES 1 1 0 127 Votes
DISK_QUORUM "$1$DGA3 " " " " " "ZZZZ" Ascii

for detail information, please refer to the above link.

Thanks very much.

TONG