For Linux on Z: Changing the kernel settings

Before starting IBM Storage Scale, perform the following steps on each Linux on Z node.

If you are using Red Hat® Enterprise Linux 7:

1. Edit the /etc/zipl.conf file and add vmalloc=4096G as shown below:

   cat /etc/zipl.conf
   Parameters = "... vmalloc=4096G"

2. Run the zipl command:

   zipl –V

3. Reboot the node.

If you are using Red Hat Enterprise Linux 8 or Red Hat Enterprise Linux 9:

1. Use the grubby utility to add vmalloc=4096G for all boot entries on your node as shown in the following example:

   grubby --update-kernel=ALL --args="vmalloc=4096G"

2. Run the zipl command:

   zipl –V

3. Reboot the node.

If you are using SLES:

1. Edit the /etc/default/grub file and add the following:

   cat/etc/default/grub
   GRUB_CMDLINE_LINUX_DEFAULT=" ... vmalloc=4096G "

2. Run the grub2-mkconfig command:

   grub2-mkconfig -o /boot/grub2/grub.cfg

3. Reboot the node.