Increase File System Size

Instructions for increasing the size of a Btrfs or XFS file system on the boot RAID.

When a Btrfs or XFS file system on the boot RAID needs to be increased, it is necessary to change the file system size in the cray_bootraid configuration service, use the lvextend command to extend the logical volume, and then use the appropriate Btrfs or XFS command to grow the file system.

Reference the following information when modifying cray_bootraid to increase file system size:

The CLE default storage set (cledefault) has the following three volume groups, each of which has multiple volumes with file system type as shown:
  • boot_node_vg
    • home (XFS)
    • imps (Btrfs)
    • nvolatile (XFS)
  • sdb_node_vg
    • db (XFS)
    • alps (XFS)
    • ncmd (XFS)
  • compute_node_local
    • temporary (ext3)
    • swap (swap)
    • unmanaged (ext3)
The SMW default storage set (smwdefault) has just one volume group, which has five volumes with file system type as shown:
  • smw_node_vg
    • home (XFS)
    • db (Btrfs)
    • log (XFS)
    • imps (XFS)
    • repos (Btrfs)
  1. Change a setting in the cray_bootraid configuration service to increase the size for the file system that needs to grow.
    XFS Example: The following example shows how to change the file system size of the home volume on the smw_node_vg volume group in the smwdefault storage set.
    Retrieve the current value.
    smw# cfgset get \
cray_bootraid.settings.storage_sets.data.smwdefault.volume_groups.smw_node_vg.volumes.home.fs_size \
global
40
    Increase it to 90.
    smw# cfgset modify --set 90 \
cray_bootraid.settings.storage_sets.data.smwdefault.volume_groups.smw_node_vg.volumes.home.fs_size \
global
    Verify that the value was changed.
    smw# cfgset get \
cray_bootraid.settings.storage_sets.data.smwdefault.volume_groups.smw_node_vg.volumes.home.fs_size \
global
90
    Btrfs Example: The following example shows how to change the file system size of the repos volume on the smw_node_vg volume group in the smwdefault storage set.
    Retrieve the current value.
    smw# cfgset get \
cray_bootraid.settings.storage_sets.data.smwdefault.volume_groups.smw_node_vg.volumes.repos.fs_size \
global
100
    Increase it to 120.
    smw# cfgset modify --set 120 \
cray_bootraid.settings.storage_sets.data.smwdefault.volume_groups.smw_node_vg.volumes.repos.fs_size \
global
    Verify that the value was changed.
    smw# cfgset get \
cray_bootraid.settings.storage_sets.data.smwdefault.volume_groups.smw_node_vg.volumes.repos.fs_size \
global
120
  2. Update and validate the global config set.
    The cfgset CLI subcommands get and modify do not run pre- and post-configuration scripts. Because the config set was changed with cfgset modify, it must be updated with cfgset update so that the scripts will be run. The --mode prepare flag is used to make user interaction unnecessary.
    smw cfgset update -m prepare global
smw cfgset validate global
  3. Extend the LVM volume for the file system.
    XFS Example: The following example shows how to extend the LVM of the home volume on the smw_node_vg volume group.
    smw# lvextend -L90G /dev/mapper/smw_node_vg-home
    Btrfs Example: The following example shows how to extend the LVM of the repos volume on the smw_node_vg volume group.
    smw# lvextend -L120G /dev/mapper/smw_node_vg-repos
  4. Grow the file system.
    XFS Example: The following example shows how to grow the /home file system.
    smw# xfs_growfs /home
    Btrfs Example: The following example shows how to grow the /var/opt/cray/repos file system.
    smw# btrfs filesystem resize max /var/opt/cray/repos