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

� If the FSBX, containing an RXB, is allocated for use with an ADD, OBTAIN, or
NOTIFY command, its data area size depends on the parameter or parameters
in the request that need additional space. The number of additional bytes
shown in “Record Size” on page 199, are also the number of bytes necessary
for the corresponding FSBX. The maximum request queue record size is set
during the installation of NetView FTP V2.2.1 MVS.
You can specify either of the following types of record length:
Fixed The minimum size that can be set is 1124 bytes; this allows only
requests that do not need an RXB to be processed.
Variable If you specify variable request queue record size, you must specify
an average and a maximum size.
The following examples show the type of parameters that can be processed with
various maximum request queue record sizes; use them as a guide to select the
optimum value for your installation.
Example 1: Maximum record size set to 1845 bytes.
This allows one of the following to be processed in one file-transfer request:
� User-written file handler parameters
� VSAM cluster definition parameters
� Up to 39 selected PDS members
� Up to 84 excluded PDS members
� SMS parameters
� Data encryption parameters
� APPC security parameters.
Example 2: Maximum record size set to 1653 bytes.
This allows one of the following to be processed in one file-transfer request:
� VSAM cluster definition parameters
� Up to 25 selected PDS members
� Up to 52 excluded PDS members
� SFS parameters
� Data encryption parameters
� OS/400 parameters.
The value specified in the CSAELIM queue handler initialization parameter limits
the maximum total amount of additional CSA storage that can be allocated for
FSBXs at any one time.
Each RXB is embedded in the FSBX and passed to or from the queue handler via
the CSA. NetView FTP V2.2.1 MVS tracks the total amount of additional CSA
storage allocated for FSBXs and rejects any request for further storage when the
amount of available storage is less than the difference between the request queue
record size (RECSIZE) and the sum of the RCB and RXB header sizes (1148
bytes).
Appendix D. Storage Requirements 205