DataLoader/MX Reference Manual (G06.24+)

DataLoader/MX Components
DataLoader/MX Reference Manual—525872-002
2-4
DataLoader/MX File System
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The file must be opened in exclusive mode. (Input files can be opened in
nonexclusive mode.)
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Guardian files. DataLoader/MX can read and write Guardian files. DataLoader/MX
determines that a file is a Guardian file if the file name begins with one of these:
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$
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\
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=
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/G
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/E
If an OSS file name is being opened for output and the file does not exist,
DataLoader/MX creates the file and writes to it as an unstructured file. It will not
write to it as an OSS text file. If the OSS file should be created as a text file, add
the TEXT interpretation after the file name. Adding the CSV and DUMP
interpretations also implicitly makes the output file an OSS text file. If the output file
name is a Guardian name, it creates an EDIT file if the file being opened for output
does not exist.
The DataLoader/MX process itself must still be run in the OSS environment, with a
working directory that is not under the /G or /E directories.
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I/O blocking. DataLoader/MX can do I/O blocking only if the RECFORM modifier is
specified. Otherwise, DataLoader/MX uses the maximum block size for I/O
blocking, as listed in Table 2-1, and each block is treated as if it contains one
record.