Data Domain File Compression Summary
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View Data Domain file pre- and post-compression values summarized for a client, with aggregated rates. This information can be instrumental in determining efficient storage strategies and identifying storage that can be reclaimed, thereby reducing archive storage expenses. This data can be used to identify clients with inefficient de-duplication ratios, highlighting where de-deduplication is not an effective approach for certain backed-up files. For example, some hosts may be running database applications that are constantly producing unique bits of data. These hosts can consume much of the expensive Data Domain storage. Data Domain collection now can identify the largest offenders, which can then be moved to less expensive storage to avoid paying premium rates for de-duplication.
See Data Domain File Compression Detail.
Configure EMC Data Domain collection to capture image-level compression rates. Aggregated global and local compression rates for all backup images can be collected for all active Data Domain Server MTrees connected (via DDBOOST) to Primary Servers. These Primary Servers must have an active Data Collector that has successfully completed an initial data collection.
These values are aggregated from relevant collections of job details as of the last successful data collection cycle.
Table: Data Domain File Compression Summary
Column name | Description |
|---|---|
|
System |
Name of the Data Domain appliance. Click to view the Data Domain System Details. |
|
Source |
Name of the backup source or object backed up by the job during the specified interval. If backup source is a known host, host name is a link to Host Details. Other backup sources are displayed with link to Object Details. |
|
Source Type |
Defines the source type such as host, resource pool, datastore or a folder. |
|
Server |
The name is derived from the host's DNS name. |
|
# of Images |
Click the number of images to view compression details. Click to Data Domain File Compression Detail. |
|
Original Size |
Amount of logical capacity associated with backups from this host to the appliance. |
|
Global Compressed |
The deduplication ratio: (raw_bytes / pre_compression_size). |
|
Global Deduplication % |
Percentage of Global compression (100 - (Global Compressed/Original Size)*100). |
|
Local Compressed |
The local compression algorithm: (pre_compression_size / pre_compression_size). |
|
Local Compression % |
Percentage of Local compression (100 - (Local Compressed/Original Size)*100) |
|
Metadata |
System overhead. |
|
Bytes to Storage Ratio |
Bytes to Storage Ratio: bytes/storage_used (local_compression + metadata). |