IBM Elastic Storage System 3200 Service Manual page 38

14. Allocate the new space by using the mmvdisk command set.
An example of adding the new storage to an existing file system is as follows:
a. Define a vdisk set that is tied to the existing recovery group. This example assumes that an
existing vdisk code is 8+2p (default), block-size is 4 MiB (default), and set-size is 80% (default).
Because the decluster array size is doubled after new 12 drives, the set-size is set to 40%
to keep the new vdisk size same as the original vdisk size. For information about non-default
configurations, see IBM Spectrum Scale RAID: Administration in IBM Elastic Storage Server
documentation.
# mmvdisk vdiskset define --vdisk-set vs_fs3200_2 --recovery-group ess3200_78E400K --code 8+2p --
block-size 4m --set-size 40%
mmvdisk: Vdisk set 'vs_fs3200_2' has been defined.
mmvdisk: Recovery group 'ess3200_78E400K' has been defined in vdisk set 'vs_fs3200_2'.
vdisk set
--------------
vs_fs3200_2
recovery group
---------------
ess3200_78E400K
node class
------------------------------
ess3200_x86_64_mmvdisk_78E400K
b. Create the newly defined vdisk set.
# mmvdisk vdiskset create --vdisk-set vs_fs3200_2
mmvdisk: 4 vdisks and 4 NSDs will be created in vdisk set 'vs_fs3200_2'.
mmvdisk: (mmcrvdisk) [I] Processing vdisk RG003LG001VS009
mmvdisk: (mmcrvdisk) [I] Processing vdisk RG003LG002VS009
mmvdisk: (mmcrvdisk) [I] Processing vdisk RG003LG003VS009
mmvdisk: (mmcrvdisk) [I] Processing vdisk RG003LG004VS009
mmvdisk: Created all vdisks in vdisk set 'vs_fs3200_2'.
mmvdisk: (mmcrnsd) Processing disk RG003LG001VS009
mmvdisk: (mmcrnsd) Processing disk RG003LG002VS009
mmvdisk: (mmcrnsd) Processing disk RG003LG003VS009
mmvdisk: (mmcrnsd) Processing disk RG003LG004VS009
mmvdisk: Created all NSDs in vdisk set 'vs_fs3200_2'.
c. To get the filesystem name, issue the following command:
# mmvdisk filesystem list
Add the new vdisk set to the existing file system.
# mmvdisk filesystem add --file-system ess3200rw3fs1 --vdisk-set vs_fs3200_2
mmvdisk: The following disks of ess3200rw3fs1 will be formatted on node
ess3200rw3a.gpfs.ess:
mmvdisk:
mmvdisk:
mmvdisk:
mmvdisk:
mmvdisk: Extending Allocation Map
mmvdisk: Checking Allocation Map for storage pool system
mmvdisk: Completed adding disks to file system ess3200rw3fs1.
d. Verify that the vdisk set is added to the file system.
# mmvdisk vs list --vs vs_fs3200_2
vdisk set
--------------
vs_fs3200_2
dataAndMetadata, system
recovery group
---------------
ess3200_78E400K
26 IBM Elastic Storage System 3200: Service Guide
member vdisks
count size raw size
----- -------- --------
4 6152 GiB 7820 GiB
declustered
array type total raw
----------- ---- ---------
DA1 NVMe 76 TiB
vdisk set map memory per server
available
---------
120 GiB
RG003LG001VS009: size 6299740 MB
RG003LG002VS009: size 6299740 MB
RG003LG003VS009: size 6299740 MB
RG003LG004VS009: size 6299740 MB
member vdisks
count size raw size
----- -------- --------
4 6152 GiB 7820 GiB
declustered
array type total raw
----------- ---- ---------
DA1 NVMe 76 TiB
vdisk set map memory per server
created file system and attributes
------- --------------------------
no -, DA1, 8+2p, 4 MiB, dataAndMetadata, system
capacity all vdisk sets defined
free raw free% in the declustered array
-------- ----- ------------------------
15 TiB 20% vs_fs3200_1, vs_fs3200_2
required required per vdisk set
-------- ----------------------
7080 MiB vs_fs3200_1 (1074 MiB), vs_fs3200_2 (1077 MiB)
created file system and attributes
------- --------------------------
yes ess3200rw3fs1, DA1, 8+2p, 4 MiB,
capacity all vdisk sets defined
free raw free% in the declustered array
-------- ----- ------------------------
15 TiB 20% vs_fs3200_1, vs_fs3200_2