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The BS2000 job control language – SDF
The software product SDF (System Dialog Facility) is a Job Control Language (JCL) and dialog interpreter for BS2000. It can be compared with the shell in Linux operating systems.
See result …
Which of the commands shown is required to display a list of all visible files? Can you click on the right command without any difficulty?
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All available commands are shown when ? is entered.
The command SET-LOGON-PARAMETERS is used for logging on to BS2000.
Once the connection with BS2000 has been set up, the input request will be displayed at the top. Click on the input options above to see what is behind them.
SDF – command structure
Commands in SDF format are easy to understand. They are entered according to English sentence structure (verb-object), for example: SHOW-FILE. The command can also be extended for more details – SHOW-FILE-ATTRIBUTES FILENAMES,INFORMATION=*ALL is a command that will display the attributes of one or more files, or a list of existing files.
SDF – abbreviation of commands
Commands can be abbreviated, but they must always be unambiguous.
Every word in a command can be abbreviated: SH-FI-A is an abbreviation for SHOW-FILE-ATTRIBUTES.
So-called guaranteed abbreviations have been defined for commands used over many generations of operating systems, for example, SHOW-FILES-ATTRIBUTES is abbreviated as SHFA.
SDF – operand check
SDF checks the commands entered, along with their operand values, to make sure that they comply with the BS2000 conventions for file names.
Command-specific error messages are issued if entries are not correct. IDs and entries of relevance to security are protected through blanking.
SDF – input options
SDF commands can be entered directly or "put together" via the integrated help function in various input screens. A question mark ? can be entered in several different places. This will result in the display of available commands or the operands of a command.
SDF – try it out!
Curious? Then try out SDF right here. Have fun!
Processing huge volumes of data
High level of transaction traffic
Which of the following requirements would be satisfied best with a mainframe? Can you pick out the three right answers?
High five-digit number of users
Users with mobile devices
Provisioning of multimedia content
Serveral applications running smoothly
in one system instance
High level of redundancy
Availability level of nearly 100 percent
Which features distinguish mainframes? Can you pick out the three right answers?
High energy consumption per user
Management only possible without GUI
Can you pick out the three similarities among mainframes, Windows servers and Linux servers?
Independance from hardware vendor
Various infrastructures in one system
IPv6 Internet protocol
What makes mainframes unique?
Can you pick out the three right answers?
Deployment of /390 and x86 systems
in one infrastructure and with
one administration interface
Nearly 100 percent utilization without problems
Best cost-effectiveness per user
Wow! That was a lot of information all at once.
How much of it do you remember?
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Has the quiz raised you curiosity?
Want to do some quick exercises? If so, just try out SDF, the job control language in BS2000.
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Which of the commands shown is required to read in the INFO file? Can you click on the right command without any difficulty? Try it!