Advanced Backup to Disk Performance White Paper

Fragmentation of File Library File Systems
Fragmentation of Windows NTFS file systems can decrease the file library performance. For best
performance, each file system should belong to one file library writer only. No other writer, process
or application should write to it.
The following examples show one optimal and one problematic configuration.
The optimal configuration with one writer results in very little fragmentation and good read
performance as shown in the next three figures.
Figure 37. Optimal File Library Configuration – One Writer per File System
Figure 38. Optimal File Library Configuration – Little Fragmentation
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