This chapter shows you how to use VDM to generate file size reports during data collection. The file size report summarizes the number of files by size and lists the names of the 50 largest files in descending order of size. It is an optional report that can only be generated at collection time for each disk that is in the DISKNAMES.DAT file. It cannot be generated on-line, though some of the information it contains is reported in the /REPORT=SIZE on-line report. It contains three sections:
Interval files report
This section of the report summarizes files by size. Files with sizes for 0 - 49 blocks are summarized in increments of 10. Files with sizes from 50 - 999 blocks are summarized in increments of 50. Files with sizes of 1000 blocks and over are summarized in increments of 1000. For each category, the report shows:
• number of files in the category
• total allocated blocks in the category
• percent of total allocated blocks
• total used blocks in the category
• percent of total used blocks
Large files report
This section of the report lists the 50 largest files on that disk in descending order of size. It is located on the right hand side of the page. The report shows the filename (up to 50 characters) as well as blocks allocated and blocks used.
File versions report
On the second page of the file size report VDM displays files with multiple versions in descending order by the number of copies of each file on disk. It displays the filename, number of versions, total blocks used and total blocks allocated. In conjunction with the purge command this report helps keep multiple versions of files from using a large amount of disk space.