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Job Results Directory Disk Space Calculation

The disk space required for the job results directory depends on the number of files to be backed up or restored and also the average size of a file.

Disk Space Calculation Formulas

Backup Jobs

Subclient_Dir_Size = 6 × System_Files_Count × System_Average_Filename_Size

Restore Jobs

Restore_Job_Size = 1.5 × Restore_Files_Count × Average_Filename_Size

Snap Jobs

SnapCopy_Job_Size = 7 × SubClient_Files_Count × SubClient_Average_Filename_Size

Deduplication

Local_cache_deduplicated_data = The value in the Limit the Max Cache size to box on the client Deduplication tab. The default size is 4096 MB. For information on the cache size setting, see Deduplication - Advanced Client Properties.

Disk Space Required for the JobResults Directory

JobResults_directory_disk_space = Subclient_Dir_Size + (Restore_Job_Size × number_of_restore_results_kept_for_a_longer_time) + (SnapCopy_Job_Size × number_of_Snap_Copy_jobs_run_in_parallel) + Local_cache_deduplicated_data

In addition, the disk space requirements of any other components that are used, such as optimized scan cache, must be added to the final number.

Examples

Environment 1 Environment 2
Number of files = 25 million

Average filename size = 15 characters

Space Required for Backup Job

6 × 25,000,000 × 14 = 2.5 GB

Space Required for Restore Job

1.5 × 25,000,000 × 15 = 560 MB

Disk Space Required for the JobResults Directory

Number of restore results kept for a longer time = 1

JobResults_directory_disk_space = 2.5 + (560 × 1) = 3.5 GB (approximately)

Number of files = 25 million

Average filename size = 15 characters

Space Required for Backup Job

6 × 25,000,000 × 14 = 2.5 GB

Space Required for Restore Job

1.5 × 25,000,000 × 15 = 560 MB

Space Required for Snap Job

7 × 25,000,000 × 15 = 2.7 GB (approximately)

Disk Space Required for the JobResults Directory

Number of restore results kept for a longer time = 1

Number of snap copy jobs run in parallel = 1

JobResults_directory_disk_space = 2.5 + (560 × 1) + (2.7 × 1) = 6.2 GB (approximately)

What to Do Next

Some agents and components require additional disk space. To review these disk space requirements, see Agents and Components Requiring Additional Disk Space.