Installation and System Requirements - O&O Software

Recommended Application
The COMPLETE/Access method is particularly suitable for use on the following systems. Please
bear in mind that using the COMPLETE/Access method for regular defragmentation should
not be combined with other methods (COMPLETE, STEALTH, and SPACE).Doing so can result
in longer defragmentation times because the file system has to be reorganized again.
• Maximizes the read access performance on servers
• For regularly defragmenting your volumes
• On computers that have sufficient resources available when the defragmentation takes
place – CPU usage is likely to increase significantly (it is strongly recommended that you
use the O&O ActivityGuard). A larger amount of free disk space is necessary with this
method
• All kinds of servers and workstations
COMPLETE/Modified Method
The COMPLETE/Modified method defragments your files and also reorganizes your file
structure. Although this method is slower than the STEALTH or SPACE methods, it guarantees
maximum performance in the reading of your files.
The COMPLETE method is particularly suitable for databases and file servers. It is important
to bear in mind that this method requires quite a lot of main memory due to file reorganization.
If this is a serious problem for your system, we recommend you use the STEALTH or
SPACE methods.
Algorithm
Files are sorted according to the date on which they were last changed. The files which have
not been changed recently are placed at the beginning of the partition and those recently
changed are placed at the end. This option is a good one for file or database servers containing
files that have never been changed (e.g. system files), but where others, on account of
their size or content, are frequently modified. (e.g., database files)
This strategy means that future defragmentation will require the least amount of time, as
only a few files need to be checked and defragmented.
Recommended Application
The COMPLETE/Modified method is particularly suitable for use on the following systems.
If you want to use the COMPLETE/Modified method for your regular defragmentation runs,
you should bear in mind that you only use this method on your drive. Combining various
methods (COMPLETE, STEALTH, and SPACE) can result in defragmentation taking much
longer, as the file system would need to be reorganized each time.
• Maximizes the performance for write access on servers
• For regular defragmentation of a drive
• On computers with sufficient free resources at the time you wish to defragment because
CPU usage can increase and a lot of free space is required – (use of the O&O Activity
Guard is particularly recommended)
• Suitable for all types of servers and workstations
User's Guide for O&O Defrag 11
O&O Defrag Methods l 19