1. Easytrieve 11.6 Compile-and-Go Processing
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Easytrieve 11.6 Compile-and-Go Processing
The What, Why, When
April 2013

2. Overview What is Compile & Go? Why/Why-not use Compile & Go?
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Overview
What is Compile & Go?
Why/Why-not use Compile & Go?
What does a 6.4 Compile & Go look like?
What does an r11 Compile & Go look like?
Performance Considerations with Compile & Go
A couple Miscellaneous Rules with Compile & Go
Questions ??
February Easytrieve Compile and Go Copyright © 2013 CA

3. Page based on Title and Text from Slide Layout palette
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What is Compile & Go?
Easytrieve source is converted to object code by the Compiler, then the object is executed, invoking Runtime.
R11 Compiler always writes an object deck to the SYSLIN file, if no PARM LINK is coded the SYSLIN file is read back in and executed.
If SYSLIB DD is omitted it is always dynamically allocated
6.4 Compiler keeps the object deck in memory and only writes it to the SYSLIN file if PARM LINK is coded.
If SYSLIB DD is omitted “DD STATEMENT MISSING” error only if PARM LINK coded
February Easytrieve Compile and Go Copyright © 2013 CA

4. Why/Why-not use Compile & Go?
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Why/Why-not use Compile & Go?
Easytrieve source treated as a parameter file, (can be changed on every run).
Don’t need the Linkedit or Execution JCL steps.
Don’t need to keep a load library ready to use.
Always gets current Options Table values.
Less control of Easytrieve source changes, (problem for “mission critical” jobs).
Compilation-phase return code is not retained, the final RC is from the “Go” part of the Compile-and-Go.
Options Table values frozen in linked Easytrieve program.
February Easytrieve Compile and Go Copyright © 2013 CA

5. Page based on Title and 2-column Text from Slide Layout palette
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What does a 6.4 Compile & Go look like? (. . .from the internal perspective)
EZTPA00 calls EZTPA01
EZTPA01 drives the C & G process
EZTPBxx programs parse Easytrieve statements and generate pre-outs
EZTPCxx programs read pre-outs and generate object code. Also optionally write the SYSLIN file
EZTPDxx programs invoke generated code
Compiler/Runtime are closely integrated, one process
February Easytrieve Compile and Go Copyright © 2013 CA

6. What does an r11 Compile & Go look like. (
What does an r11 Compile & Go look like? (. . .from the internal perspective)
EZTPA00 checks for NEWFUNC and LINKs to EZT or continues down 6.4 path
EZT does a LINK to EZTCOM. EZTCOM always writes the SYSLIN file
Depending on the return code from EZTCOM, EZT ends or does a LINK to EZTGO
EZTGO reads the object deck from the SYSLIN file, makes it executable, then invokes it.
Generated code then runs as if it was linked
Compiler and Runtime are separate processes
February Easytrieve Compile and Go Copyright © 2013 CA

7. Performance Considerations with Compile & Go
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Performance Considerations with Compile & Go
Add time for Compilation phase
Add memory for Compilation phase
Object is always loaded into 24-bit storage
Object cannot be infinitely large
Execution part is no different from Linked execution
Longer-running jobs show less difference
February Easytrieve Compile and Go Copyright © 2013 CA

8. A couple Miscellaneous Rules with Compile & Go
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A couple Miscellaneous Rules with Compile & Go
Static program CALLs are not allowed
FOR EXAMPLE:
DECLARE MCPROGA PROGRAM STATIC
. . .
CALL MCPROGA
Number of different CALLed programs limited to 100
February Easytrieve Compile and Go Copyright © 2013 CA

9. Page based on Title and Text from Slide Layout palette
Page based on Title and Text from Slide Layout palette. Design is cacorp 2006.
Questions ?? ?
February Easytrieve Compile and Go Copyright © 2013 CA