What can you delete to free up disk space in IBM InfoSphere Information Server

What can you delete to free up disk space in IBM InfoSphere Information Server when disks are becoming full?

What to do ????

Here are some things you can do to clean up space:

• Clear the &PH& file in the Project directory. There is a &PH& directory in each DataStage project directory, which contains information about active stages that is used for diagnostic purposes. The &PH& directory is added to every time a job is run, and needs periodic cleaning out.
  

FileSet in DataStage

DataStage can generate and name exported files, write them to their destination, and list the files it has generated in a file whose extension is, by convention, .fs. The data files and the file that lists them are called a file set.  while their storage places are diverse Unix files and they're human-readable.

DataSet, FileSet and Seq File in DataStage

Seq File:

Extract/load from/to seq file max 2GB { Its depends on OS property, Now most of the OS supports greater than 2 GB }

when used as a source at the time of compilation it will be converted into native format from ASCII

does not support null values

A seg file can only be accessed on one node.