Storage requirements
This table lists storage requirements for the basic ECSA, CSA, and Extended Private for TDMF.
Location Subpool | Above or Below 16 Mb Line | Size | Master Agent Or Both | Page Fixed When | Page Freed When | TDMF Usage |
---|---|---|---|---|---|---|
HVCOMMON6 | Above | 16K to 20K | Both | System initialize | System terminate | Main control block |
ECSA 241 | Above | 24K | Both | System initialize | TSO Monitor | |
ECSA 228 | Above | 16K to 392K | Both | System initialize | System terminate | Main control record |
HVCOMMON6 | Above | 4K | Both | System initialize | Volume terminate | WORK control block - per volume pair |
HVCOMMON6 | Above | 4K | Both | System initialize | Volume terminate | VMSG control block - per volume pair |
HVCOMMON6 | Above | 1K to 12K | Both | System initialize | System terminate | DDTV control block |
CSA 228 | Below | 256 bytes | Both | System initialize | System terminate | DDTR control block |
HIGHVIRTUAL4 | Above | nK | Master | System initialize | System terminate | MSVE record - nK1*# of Agents |
HVCOMMON6 | Above | 24K- 28K | Both | System initialize | Volume terminate | VRBM control block - per volume pair |
HVCOMMON6 | Above | 16K | Both | Volume activate | Volume terminate | PAV2 alias DDTE block - per alias device |
ECSA 228 | Above | 4K | Both | System initialize | System terminate | Communications with EMC API |
ESQA | Above | (#vols*524) + 554 | Both | Volume initialize | Volume terminate | SRB/IOSB storage |
Private4 | Above | 4K(min) 64K(max) | Master | System initialize | System terminate | Communications Number of systems / 2*4K (rounded up) |
Private4 | Above | 4K to 20K | Agent | System initialize | System terminate | Communications CCW |
Private4 | Above | 12K | Both | System initialize | System terminate | Common I/O areas |
HIGHVIRTUAL4 | Above | 4K(min) 8MB(max) | Master | System initialize | System terminate | VRNQ I/O area - Number of systems * Number of volume pairs * 4K |
HIGHVIRTUAL4 | Above | nK | Master | Volume terminate | Volume terminate | VRBM control block- per volume pair |
HIGHVVIRTUAL5 | Above | 900K | Master | Volume initialize | Volume terminate | Cylinder I/O - per volume pair |
HIGHVIRTUAL4 | Above | 60K | Master | Volume initialize | Volume terminate | Track I/O area - per volume pair |
Private4 | Above | 32K | Master | Volume initialize | Volume terminate | Copy task CCW area - per volume pair |
Private4 | Above | 64K | Both | System initialize | System terminate | Trace Table |
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If the Compare option or Full Speed Copy is requested, an extra 900 K buffer for each volume’s migration is allocated. Therefore, if 16 3390-3 volumes are being migrated with two systems that are involved, and the Offline Volume Access option is not selected, the storage requirements for the Master and Agent system are listed below.
Master system
- Fixed common area storage - 612 K HVCOMMON, 9 K ESQA, 256-bytes CSA
- Pageable common area storage - 28 K HVCOMMON
- Fixed extended private area storage: 16,600 K
Agent system
- Fixed common area storage - 617 K HVCOMMON, 5 K ESQA, 256-bytes CSA
- Pageable common area storage - 28 k HVCOMMON
- Fixed extended private area storage - 656 K