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Chapter 15-5, "z/OS: FTP command without disk bottleneck" on page 486 shows
an example of connecting to a z/OS system and switching to the *dev.null
directory to avoid write I/O on the target system. The local file is being read from
in this example.
Example 15-5 z/OS: FTP command without disk bottleneck
C:\>ftp <system>
Connected to <system>.
220-FTPD1 IBM FTP CS V1R2 at <SYSTEM>, 15:44:09 on 2006-02-27.
220 Connection will close if idle for more than 5 minutes.
User (<system>:(none)): triple8
331 Send password please.
Password:
230 TRIPLE8 is logged on. Working directory is "TRIPLE8.".
ftp> cd *dev.null
250-Working Directory for PUT is NULL Device;
250 for GET is "TRIPLE8." name prefix.
ftp> bin
200 Representation type is Image
ftp> put TESTFILE.exe zz.exe
200 Port request OK.
125 Storing data in the Null directory (*dev.null).
250 Transfer completed successfully.
ftp: 225904 bytes sent in 0.03Seconds 7530.13Kbytes/sec.
ftp> quit
221 Quit command received. Goodbye.
You can also use the FTP transfer statistics and compare those against the
backup/restore numbers from a selective file backup and restore. When dealing
with just a single large file, we will not see any database processing overhead but
will collect comparable numbers for network throughput. To avoid any file
caching side effects, create a file that is larger than the client memory, then FTP
transfer the file from the server to the client and back. The preferred target
directory is the directory where your server's disk storage pools are located.
Doing the put/get will provide output similar to Example 15-6.
Example 15-6 FTP statistics for the put transfer of a 500 MB file
C:\>ftp banda.itsosj.sanjose.ibm.com
Connected to banda.itsosj.sanjose.ibm.com.
User (banda.itsosj.sanjose.ibm.com:(none)): maximilian
331-Password:
230-Last login: Fri Mar 3 11:02:27 PST 2006 on ftp from ::ffff:9.43.86.888
230-User maximilian logged in.
ftp> put 500MBFile
200 PORT command successful.
486
IBM Tivoli Storage Manager Implementation Guide
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