IBM 5695-DF1, 5655-DB2 manual Table Space and Index Space Names, Bsds Names, Active Log Names

3.8.1 Table Space and Index Space Names

The names for DB2 table spaces and index spaces have the following structure:

Table 3. Table Space and Index Space Names

hlq.DSNDBx.dbname.spname.ynnnn.Ammm

The elements of this name are:

hlq VSAM catalog high level qualifier

DSNDB Standard part of the name

xIdentifies a VSAM cluster or data component

CCluster

DData

dbname Database name

spname Space name. Either a table space name or an index name. Because index names can be more than 8 characters long, DB2 sometimes needs to generate an 8 character name. To avoid randomly generated names, and to be able to correlate the index name to the index space, it is recommended to limit index names to 8 characters. This is also true for table names for implicitly defined table spaces (that is, the creation of the table is done without having created the table space), since DB2 will assign a unique table space name.

yData set type:

IStandard data set

S Shadow data set

T Temporary data set

nnnnnumber = 0001

AStandard character, A

mmmUsed for table spaces or index spaces with multiple data sets; mmm is either 001, the data set number, or the partition number.

3.8.2BSDS Names

The default names for BSDSs have the following structure:

Table 4. BSDS Names

hlq.BSDS0n

hlq VSAM catalog high level qualifier

BSDS0 Standard part of the name

nBSDS copy, 1 or 2

3.8.3Active Log Names

The default names for active log data sets have the following structure:

Table 5. Active Log Data Set Names

hlq.LOGCOPYn.DSmm

hlq VSAM catalog high level qualifier

DB2 Storage Objects 23