Coupling facility structure names

Names for coupling facility structures must conform to a strict naming convention that is based on the Db2 group name.

Sample names are shown in the following table:

Table 1. Sample names of coupling facility structures
Structure type Example name
Cache structure (group buffer pools) DSNDB0A_GBP0
Lock structure DSNDB0A_LOCK1
List structure (shared communications area) DSNDB0A_SCA
Group buffer pool names
Use a name of the following format on the CFRM policy to define the group buffer pool to the coupling facility. The name can be up to 16 characters long. 
groupname_GBPxxxx
Where GBPxxxx is the name of the group buffer pool; the following restrictions apply:
  • 4 KB group buffer pools are named GBP0, GBP1, …, GBP49
  • 8 KB group buffer pools are named GBP8K0, GBP8K1, …, GBP8K9
  • 16 KB group buffer pools are named GBP16K0, GBP16K1, …, GBP16K9
  • 32 KB group buffer pools are named GBP32K, GBP32K1, …, GBP32K9
Requirement: You must define GBP0, GBP8K0, GBP16K0, and GBP32K. You must also define any other group buffer pools that you need for your particular data sharing setup.

When Db2 duplexes a group buffer pool structure, the same structure name is used for both the primary and secondary structures. A duplexed structure requires a single CFRM policy structure definition, with one structure name.

Lock structure name
Use a name of the following format on the CFRM policy to define the lock structure to the coupling facility. The name can be up to 16 characters long.
groupname_LOCK1
Shared communications area
Use a name of the following format on the CFRM policy to define the SCA to the coupling facility. The name can be up to 16 characters long.
groupname_SCA