Figure 1 shows the start of automatic space management. The data set names above the names of each of the groups of DASD devices and below the groups of tape devices are the names of data sets that are stored on the devices. Only the names of data sets that DFSMShsm processes during the course of this example are shown.
Figure 1. Example System of SMS-Managed Volumes before
start of Automatic Space Management
Note: The names of the management classes have been used
as high-level qualifiers for the data set names. This was done to
make it easier for you to associate the data sets with the management
classes. This is merely a teaching aid. You are not required to use
the management class name as any part of the name of the data set.
Table 1 shows the characteristics of each of the data sets used in Figure 1. The names of the data sets are not precisely as the system might generate them. They have been shortened and modified for convenience in using them for examples.
| Data Set Name | Days Since Created | Last Usage (Days) | Size (KB) | GDG Status |
|---|---|---|---|---|
| GDSMC.G3.V6 | 1 | 1 | 217 | Not rolled off |
| GDSMC.G3.V5 | 2 | 2 | 215 | Not rolled off |
| GDSMC.G3.V4 | 8 | 5 | 210 | Not rolled off |
| GDSMC.G3.V3 | 10 | 5 | 207 | Not rolled off |
| GDSMC.G3.V2 | 11 | 5 | 205 | Not rolled off |
| GDSMC.G3.V1 | 15 | 5 | 200 | Rolled off |
| LARGEMC.G4.E1 | 50 | 16 | 1200 | None |
| NOMIGMC.G4.D1 | 25 | 21 | 20 | None |
| LARGEMC.ML.G1 | 183 | 120 | 1100 | None |
| STANDMC.G1.A1 | 361 | 180 | 200 | None |
| STANDMC.G1.A2 | 60 | 7 | 200 | None |
| STANDMC.G1.A3 | 60 | 7 | 200 | None |
| STANDMC.G2.B1 | 54 | 12 | 600 | None |
| STANDMC.G2.B2 | 30 | 14 | 100 | None |
| STANDMC.G3.C1 | 110 | 61 | 400 | None |
| STANDMC.ML.F1 | 181 | 120 | 190 | None |
| STANDMC.ML.F2 | 380 | 121 | 3 | None |
| STANDMC.ML.F3 | 120 | 62 | 240 | None |
Note: 1 KB = 1024 bytes.
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