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

system. It is used when a server cannot initiate a conversation
with a server at a remote system because:
� All the servers at the remote system are busy with
other transfers
� None of the servers at the remote system has been
started
� ACF/VTAM is temporarily unable to find a path
between the two servers.
The server at the local system automatically changes
the status of the request from active back to waiting,
and goes on to process the next request in the request
queue (MVS, VSE, or VM) or request database
(OS/400). Later, NetView FTP tries again to process
the request. It keeps trying until it succeeds in initiating
a conversation.
automatic transfer restart. NetView FTP’s method for
automatically restarting a file transfer that was interrupted.
In the following situations, NetView FTP is not
able to recover a conversation:
� The queue handler or server at either system is terminated
� The server at either system cannot allocate the file
being transferred
� A pre-transfer user-exit routine at either system
rejected the file transfer
� There is a severe or prolonged conversation
outage.
However, when you create a request you can specify
that if one of these situations arises, NetView FTP is to
change the status of the request back to waiting. The
servers at your system then periodically reprocess the
request until one of them succeeds in restarting the
transfer.
basic partitioned access method. An access method
that can be used to create program libraries in directaccess
storage for convenient storage and retrieval of
programs.
basic sequential access method. An access method
for storing or retrieving data blocks in a continuous
sequence, using either a sequential access or a direct
access storage device.
BIND. Bind Session.
Bind Session. In SNA, a request to activate a session
between two logical units.
blocked request. A waiting request that is trapped in
the queue. The request was passed to the queue
handler at a time when there was enough CSA storage
available to NetView FTP to do so. However, in the
meantime, the limit of the amount of CSA storage avail-
266 NetView FTP V2 MVS Installation, Operation, and Administration
able to NetView FTP was reduced and is not enough to
allow the queue handler to pass the request to a server
for processing. The request cannot be processed until
the limit of the amount of CSA storage available to
NetView FTP is raised.
BPAM. Basic partitioned access method.
BSAM. Basic sequential access method.
callback. In the AIX operating system, a procedure
that is called if and when certain specified conditions
are met. This is accomplished by specifying the procedure
in a callback list.
callback list. (1) A list of procedures that are called if
and when certain specified conditions are met. (2) In
the program IBM AIXwindows Environment/6000, individual
widgets can define callback lists.
CCB. Command control block.
CCI. Common control block insertion.
CCSID. Coded character set identifier.
CCW. Channel command word.
CDC. Character data conversion.
CDRA. Character Data Representation Architecture.
CDRM. Cross-domain resource manager.
CDRS. Cross-domain resource.
character data. Data in the form of letters, numbers,
and special characters, such as punctuation marks, that
can be read by the human eye.
Character Data Representation Architecture. An
IBM architecture that defines a set of identifiers, services,
supporting resources, and conventions to achieve
a consistent representation, processing, and interchange
of graphic character data in SAA environments.
character literal. A symbol, quantity, or constant in a
source program that is itself data, rather than a reference
to data.
checkpoint. A point at which information about the
status of a file transfer is recorded. If the file transfer is
interrupted, NetView FTP can use this information to
resume the file transfer from a point near where the
interruption occurred instead of from the beginning of
the file.
checkpoint data set. A data set that contains information
about the current status of an active file transfer. If
the file transfer is interrupted, NetView FTP can use this
information to resume the file transfer from a point near