HP Disk FIle Optimizer for OpenVMS (DFO)

August 4, 2008 in Defragmentation, File System, ODS-2, ODS-5 | No comments

The OpenVMS file system was built when storage was very expensive. As a result, to optimize space, it incorporates the concept of volume and file fragmentation. As a free utility the HP Disk File Optimizer for OpenVMS (DFO) utility allows you to better understand the impact of that fragementation. If you purchase a license it allows you to defragment the volumes “on the fly”.
clipped from h71000.www7.hp.com


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HP OpenVMS Systems


HP
Disk File Optimizer for OpenVMS (DFO)
New—HP DFO supports Integrity servers, AlphaServer systems, and VAX systems


As the data on your drives grows, so do performance problems
caused by fragmentation. HP Disk File Optimizer (DFO) automatically reduces
file fragmentation, combating performance lags while ensuring data
integrity. To use disk space efficiently, your OpenVMS file system
fragments files as they are written. As the file and free space
becomes fragmented, disk performance degrades and system performance
deteriorates. HP DFO restores prior performance
levels by defragmenting the files, free space, and index file of
the disk.


How fragmented are your disks? Following are executables that provide fragmentation reports on your disks. These utilities require
the following privileges: BYPASS, NETMBX, TMPMBX or SYSPRV, and
READALL.

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