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distributed parity group have to be allocated the same CLPR. Parity groups
including LDEVs where cache area of Cache Residency is defined cannot be
moved to another CLPR. For the restrictions on the CLPR's transfer, see the
Performance Guide
. The following shows examples of parity groups transfer
in CLPR.
Move the parity group 32-17 to the CLPR number 1.
# raidcom modify clpr -clpr 1 -parity_grp_id 32-17
When you move parity groups by specifying their LDEV numbers, use LDEV
numbers for virtual volumes of Dynamic Provisioning, Copy-on-Write
Snapshot, or Thin Image. When you move other volumes, specify a parity
group number or external volume group number. The following shows an
example of moving a virtual volume of Dynamic Provisioning, Copy-on-Write
Snapshot, or Thin Image.
Move the virtual volume of LDEV number: 02:00 to CLPR ID: 2.
# raidcom modify clpr -clpr 2 -ldev_id 0x0200
Checking result of CLPR transfer
By displaying the information about parity groups, check the result of CLPR
transfer. The following shows an example of parity group list.
# raidcom get parity_grp
T GROUP Num_LDEV U(%) AV_CAP(GB) R_LVL R_TYPE SL CL DRIVE_TYPE
R 32-16 4 45 140000 RAID1 2D+2D 0 0 DKS2C-K072FC
R 32-17 4 45 140000 RAID1 2D+2D 0 1 DKS2C-K072FC
R 33-16 4 45 140000 RAID1 2D+2D 0 3 DKS2C-K072FC
R 33-17 4 45 140000 RAID1 2D+2D 0 3 DKS2C-K072FC
Server Priority Manager operations
Server Priority Manager enables you to prioritize host I/O operations to
provide high-speed processing for specified hosts. The host is identified by
the WWN or iSCSI name of the host bus adapter. Server Priority Manager has
two settings: prioritized and non-prioritized. Set the prioritized option for
hosts that require high-speed processing, and the non-prioritized option for
the other hosts.
The following methods are used to set the priority level, but only one of them
can be used in a single storage system:
•
Specifying ports and WWNs of host bus adapters
¢
Using SPM without registering host groups to the SPM group
¢
Using SPM by registering host groups in the SPM group (VSP only)
For details, see
Configuring Server Priority Manager by specifying ports
•
Specifying an LDEV and a WWN of the host bus adapter
For details, see
Configuring Server Priority Manager by specifying LDEVs
and WWNs or iSCSI names of HBAs on page 5-66
.
•
Specifying an LDEV and an iSCSI name of a host bus adapter
Provisioning operations with CCI
5-55
Command Control Interface User and Reference Guide
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