When you use the Changelist feature for Dell EMC Isilon/PowerScale, a considerable reduction of more than 50 percent of the time taken for file scan operations is seen.
There is also a considerable reduction of CPU usage when you run Changelist backups compared to the CPU usage of a regular file system backup.
Job Results Directory Disk Space Requirements
You require a minimum of 4 GB of disk space for approximately 25 million files. For more information on calculating the disk space, see Job Results Directory Disk Space Calculation.
Data set for CIFS Shares (Windows)
The following table compares performance metrics of file scan time for a regular file system backup versus file scan operations that use the Changelist feature for Dell EMC Isilon/PowerScale.
Folder count: 15621
File count: 12 million files
Total number of modifications: 49745
File Scan Operation
Full Backup (Time taken in minutes)
Incremental backup (Time taken in minutes)
File system scan using the Changelist feature for Dell EMC Isilon/PowerScale
Regular file system scan