Diskeeper 10 User's Manual

44 Diskeeper Operation
extra processing to further improve free space consolidation. It is important to note this method requires
additional processing and time, and free space consolidation improvement will be gradual as the option is
used over time. Since the Comprehensive Defragmentation method is best suited for scheduled
defragmentation jobs, it is not available for Manual Defragmentation Jobs.
In addition to these options, you can specify how Diskeeper handles large files. When the Efficiently
defragment large files option is enabled, Diskeeper defragments large files only to the point where access time
is improved and further defragmentation will not return a significant improvement. This can save considerable
system resources and can significantly reduce the time to run a job.
The Defragmentation Methods options are available within the Primary and Secondary Job Properties options
described on page 43.
To change the defragmentation method for Manual Defragmentation Jobs, click Manual Defragmentation Job
Properties in the toolbar, then select Defragmentation Methods. Note the defragmentation method you
set for Manual Defragmentation jobs will apply to all manual defragmentation jobs on all your volumes.
To change the defragmentation method for Primary or Secondary defragmentation jobs, click Primary
Defragmentation Job Properties or Secondary Defragmentation Job Properties in the
toolbar,, select one or more volumes, then select Defragmentation Method.
Note that the defragmentation method you set for Primary or Secondary defragmentation jobs will apply to all
jobs of that type. For example, you can use the “Quick Defragmentation” method for all Primary
Defragmentation Jobs, and use the “Comprehensive Defragmentation” method for your Secondary
Defragmentation Jobs.
Setting Disk and CPU Priority
You can control the amount of disk input/output (I/O) and CPU resources used by Diskeeper for Manual,
Primary and Secondary defragmentation jobs. For each of these job types, the Properties option allows you to
control the disk and CPU priority.
Running at the lowest CPU priority minimizes the system performance impact when Diskeeper is
defragmenting a volume. However, defragmentation jobs running at the lowest priority can take substantially
longer to complete than those running at higher priorities, since Diskeeper "backs off" for any process running
at a higher priority (even screen savers). For this reason, you may have occasions where you want to run
Diskeeper at a higher CPU priority. Keep in mind, though, that your system performance may be impaired
when Diskeeper is run at higher priorities.
In addition to the different levels of CPU priorities to choose from, Diskeeper also offers I/O Smart. This option
takes the concept of run priorities one step farther by “throttling” (suspending) the defragmentation process
whenever disk I/O activity is detected on a disk while it is being defragmented. This ensures the
defragmentation process will be transparent to users, no matter how active the disk.
To change the priority for Manual Defragmentation Jobs, click Manual Defragmentation Job Properties
in the toolbar, then select Disk and CPU Priority. Note the disk and CPU priority properties you set for
Manual Defragmentation jobs will apply to all manual defragmentation jobs on all your volumes.
To change the priority for Primary or Secondary defragmentation jobs, click Primary Defragmentation Job
Properties or Secondary Defragmentation Job Properties in the toolbar, select one or more
volumes, then select Disk and CPU Priority.
Note that the Disk and CPU Priority properties you set for Primary or Secondary defragmentation jobs will
apply to all jobs of that type. For example, you can set the priority for all Primary Defragmentation Jobs to run