ETERNUS SFAdvancedCopy Manager 14.0 Operator's Guide forCluster Environment

3.2.2 Shared disk capacity for AdvancedCopy Manager shared data

The capacity required for the shared disk used to store shared data is as follows:

Table 3.11 Shared disk capacity for AdvancedCopy Manager shared data

Transaction Type	Disk Space Required
Storage Management Server transaction	The total value of 1 to 4 below
Storage Server transaction	The total value of 2 to 4 below
Tape Server transaction	If the Tape Server transaction coexists with the Storage Management Server transaction, the total value of 1 to 5 below is required. If the Tape Server transaction coexists with the Storage Server transaction, the total value of 2 to 5 below is required.

1. Security operations

   • For the Windows edition of MSCS/WSFC and the Windows edition of SynfinityCluster:

     Number of transactions * 7 + number of devices/3 + number of cabinets + 13,319 + (number of users)/20 [KB]

   • For all other cases:

     Number of transactions * 2 + number of devices/3 + number of cabinets + 13,319 + (number of users)/20 [KB]

2. Replication operations

   • If the number of paired replication source/replication destination volumes used for a replication operation is p, use the following formula:

     1.1 * p [KB]

3. Backup operations

   • If the number of backup disks is "a" and the number of transaction disks is "b":

     (a + b*35)/1024 [MB]

4. Capacity required for cluster operation management data

   1,024[KB]

5. Capacity required for Tape Server transaction management data

   A + 300[MB]

   "A" is the value that is given by the formula below, rounded up to the nearest multiple of 20 megabytes.

   • If Symfoware is backed up:

     ((13 + 3 x (n + 1)) x m) + (50 x o x 3) [KB]

   • If Symfoware is not backed up:

     ((10+ 3 x (n + 1)) x m) + (50 x o x 2) [KB]

     Refer to the table below for the values of m, n, and o.

     Table 3.12 Values of m, n, and o

     m	The number of backups held per transaction volume, including both generation management backups and day number management backups. Add up the number of generation management backups and day number management backups held.
     n	The number of transaction volumes for which tape backups are performed. For Symfoware backups, add up the number of database spaces.
     o	The total number of backups, restorations, and copies to tape that will be executed simultaneously. For Symfoware backups, add up the number of database spaces.

Note

If a single shared disk is to be used for both the repository and the shared data, add the size of the shared disk for the repository (partition, etc.) that will coexist on the shared disk for shared data to the abovementioned value.