Chapter 3. Operating NetView FTP V2.2.1 MVS - IBM

Queue Handler
Calculating the Maximum Request Record Size
Take the following into consideration when you decide the maximum request record
size:
� For each of the request records of the types that you use, shown in “Record
Size” on page 199, add the number of additional bytes to the minimum record
size. Some of the request record types can be used in combination, for
example VSAM cluster definition, job submission, and additional user-exit information.
� List all combinations you want to allow and calculate the resulting record size.
Then take the largest record as the maximum. Notice that for additional userexit
routine input you can specify up to 1220 bytes, for a post-transfer call up to
4122 bytes. This could mean that parameters from other groups cannot be
specified. To avoid this you can limit the length of variable length input records
in the user-exits.
If you choose a CI size of, for example, 4096 bytes, ensure that a maximum record
size of 4096 - 7 = 4089 is sufficient, otherwise choose a larger CI size and record
size.
Modules 250KB
Automatic Areas 200KB x number of FSBSLOTS
Dynamic Areas
Server Group Table
28 bytes x number of records in the server group table
Request Queue Directory
108 bytes x number of records in the request queue.
This area is allocated above 16MB.
Server Table
180 bytes x maximum number of servers
Status Display Area
((MAXSRV x 4 - 1) + 5) x 61
FSBX MIN (C, L)
where:
L Size of a request queue record, plus the sizes of the RXB and
FSBX headers
C Value of the CSAELIM parameter.
Appendix D. Storage Requirements 201