Answer Posted / abhishek

AB_WORK_DIR specifies the storage directory for temporary
files written by co-operating system when running a job. It
is a configuration variable whose value is a working space
for graph execution. It maintains the information related
to graph recovery.
In most cases, temporary files are maintained in the .WORK
subdirectory of a component’s layout. But when you use host
layouts or database layouts, which lack directory paths, or
when you use unwritable layout directories, the data is
written to a subdirectory of AB_WORK_DIR.

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