Utilities and Procedures › CATVMFI - Initialize the Volume Master File › Volume Master File Allocation Worksheet

Volume Master File Allocation Worksheet

Use this worksheet to estimate the amount of direct-access storage you will need for the VMF.

Note: Do not allocate the VMF and ALOG on the same volume. This is for recovery support purposes. The ALOG is needed for recovery if the volume containing the VMF fails. Do not allocate the VMF, ALOG, or VMFINDEX files on a volume that contains a USER CATALOG. This may cause performance issues. The VMF, VMFINDEX, and RMF may be on the same volume.

Number of tape volumes are in your current tape library:

VOLTOT = _____________________

Expected tape library growth in the next 12 months as a percentage: (If negative, enter 0.)

PCTGROW = _____________________

Percentage of data sets that span more than six volumes:

PCTMV = _____________________

Percentage of tape volumes that contain more than one data set:

PCTMD =_____________________

Average number of data sets on a multi-data set volume:

AVGMD = _____________________

Do you plan to use auxiliary messages? (If yes, enter 1. If no, enter 0.)

AUXMSG = ____________________

Number of records per cylinder for the device CA TLMS VMF is stored on:

RPCYL = _____________________

Using the values you have supplied, perform the following calculations:

Calculate additional records:

ADDRECS = VOLTOT * PCTGROW/100

ADDRECS = _____________________

Calculate multivolume record count:

MVRECS = VOLTOT * PCTMV/100

MVRECS = _____________________

Calculate multi-data set record count:

MDRECS = (VOLTOT * PCTMD/100)/2

MDRECS = _____________________

Calculate number of records:

TOTRECS = VOLTOT + ADDRECS + MVRECS + (MDRECS * AVGMD) + (AUXMSG * 50)

TOTRECS = _____________________

Calculate number of cylinders:

TOTCYLS = TOTRECS * 1.5 / RPCYL + 0.5

TOTCYLS = INTEGER _____________________

Code your JCL SPACE parameter as:

SPACE = CYL,(TOTCYLS)

SPACE = _____________________