Load and Storage Summaries
Creation Date: April 30, 1997
Revision Date: March 30, 2015
Product: DS‑Client
Summary
The DS‑Client accumulates statistical information that can help to analyze load, utilization and storage trends it experiences.
For new target backup servers, the DS‑Client can perform statistical backups for a few days or weeks to generate statistical information. Statistical backup sets are similar to online backup sets (the data source is scanned, new files are compressed and encrypted) except no data is sent to DS‑System. Statistical backups can help you analyze data amounts, trends and incremental amounts before performing actual backups.
In production environments, all the statistical information gathered is displayed (for Online backup sets, Statistical backup sets, Self-Contained backup sets, and Local-Only backup sets). The Load Summary and Storage Summary screens are accessible from the Reports menu. The Storage Summary allows you to filter for statistical information from specific backup set types.
Load Summary statistics
The Load Summary can help administrators analyze the load on the DS‑Client computer for a selected period of time. If you observe high values at a particular time period, you should consider rescheduling the activities to distribute the load more evenly. If you observe high values at all times, you should consider using a more powerful computer or delegate some backup sets to another DS‑Client.
The DS‑Client service automatically collects data for these statistics at one‑minute intervals. Every five minutes, the DS‑Client service updates an internal table with the peak amounts for the following statistics:
Send amount | Peak of transmitted amount to DS‑System (KB/sec) |
Receive amount | Peak of received amount from DS‑System (KB/sec) |
CPU load | CPU utilization (0‑100%) |
Memory load | Memory utilization (0‑100%) |
Memory committed | Amount of allocated memory (in MB) |
Activities | Number of DS‑Client activities |
Storage Summary statistics
The Storage Summary can help administrators analyze the trends for Online amount, number of files and backup time.
There are two types of figures (statistics): primary (such as Online, Files, Backup Files, etc.) and derived (all of the ‘incremental’ amounts). A primary figure reflects a real number obtained from the statistics. A derived figure is linked to a primary figure (e.g. Incremental Files is linked to Files), and is obtained by subtracting the current primary figure point from the previous primary figure point.
During administrative processes, the DS‑Client service automatically calculates the following statistics:
Time statistics (in minutes)
Average Time | Average duration of all scheduled and on-demand backup sessions for the selected period. |
Actual Time | Total duration of all scheduled and on-demand backup sessions for the selected period. |
Files statistics
Total Files | The total number of files stored Online (including all generations) |
Incremental Files | This is a derived figure, showing the increment to the Total files. |
New Files | The total number of new backed up files (i.e.: files backed up for the first time). |
Backup Files | The total number of files backed up for the selected period. |
Incremental Backup Files | This is a derived figure, showing the increment to the Backup Files. |
Amount statistics (MB)
Total Online | The total amount stored Online. |
Incremental Online | This is a derived figure, showing the increment to the Total Online. |
New Online | The total amount for the new backed up files. |
Transmitted | The total amount of data transmitted to DS‑System (includes the effects of compression, DS‑Delta and DS‑Library technologies.) |
Incremental Transmitted | This is a derived figure, showing the increment to the Transmitted amount. |
Online Backup | The total amount of data backed up for the selected period. |
Incremental Online Backup | This is a derived figure showing the increment to Online Backup. |