IBM 3000 6.0.2, Service Manual

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a. Identify the node class name that is associated with the system by going through MES.
Example
[root@ess3k5a ~]# mmvdisk nc list
node class recovery group
-------------------- ---------------
ess_x86_64_mmvdisk ess3k
ess_x86_64_mmvdisk_5 ess3k5
gssio1_ibgssio2_ib -
b. Gather the current pagepool configuration by issuing the following command:
# mmvdisk server list –-nc <node class name> --config
Example
[root@ess3k5a ~]# mmvdisk server list --nc ess_x86_64_mmvdisk_5 --config
node
number server active memory pagepool nsdRAIDTracks
------ -------------------------------- ------- -------- -------- -------------
21 ess3k5a-ib.example.net no 754 GiB 75 GiB 131072
22 ess3k5b-ib.example.net no 754 GiB 75 GiB 131072
Here you can see that the pagepool is less than 25% of physical memory.
c. To change the pagepool percentage, check that GPFS is running:
d. Restart the GPFS by issuing the following command:
# mmstartup -N <node class name>
Example
[root@ess3k5b ~]# mmstartup -N ess_x86_64_mmvdisk_5
Wed Feb 19 16:37:02 EST 2020: mmstartup: Starting GPFS ...
e. Change the pagepool to 60%, which is 460G by issuing the following command:
# mmchconfig pagepool=460G -N <node class name>
f. Ensure that the 460G pagepool setting is listed for the target node class by issuing the following
command:
# mmlsconfig -Y | grep -i pagepool
8. Restore GPFS normal operational mode and confirm pagepool configuration setting (customer task).
Do the following steps on both canisters:
a. Restart the server by issuing the following command:
# systemctl reboot
b. When the server is up again, do a basic ping test between the canister over the high-speed
interface.
c. If the ping is successful, start GPFS again by issuing the following command:
# mmstartup -N <node class name>
d. Ensure that node servers are active before you do the next step by issuing the following command:
# mmgetstate -a
You can use the following command also to check the pagepool:
# mmvdisk server list --nc <node class name> --config
46 IBM Elastic Storage System 3000: Service Guide