Data Domain DD400 Series, User Manual

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Statistics and Basic Operations
82 DD400 Series Restorer User Guide
Display
To display the space available to and used by file system components, use the
filesys show
space
operation or click File System in the left panel of the DDR Manager. Values are in
gigabytes to one decimal place.
filesys show space
The display is similar to the following:
# filesys show space
Resource Size GB Used GB Avail GB Use%
------------------- ------- ------- -------- ----
/ddvar 29.5 0.2 29.3 1%
Pre-compression - 56.9 - -
Data 3982.0 44.5 3937.5 1%
If 100% cleaned* 3982.0 41.8 3940.2 1%
Meta-data 19.7 0.0 19.7 0%
Index 60.0 0.6 59.4 1%
------------------- ------- ------- -------- ----
Estimated compression factor*: 1.3x = 56.9/(41.8+0.0+0.6)
* Estimate based on 2004/11/22 cleaning
Display Compression
To display the amount of compression for a single file, multiple files, or a file system, use the
filesys show compression
command. Optionally, display compression for a given
number of hours or days. In general, the more often a backup is done for a particular file or file
system, the higher the compression. Note that the display on a busy system may not return for one
to two hours. Other factors may also influence the display. Call Data Domain Technical Support to
analyze displays that seem incorrect.
filesys show compression [ path ] [last { n hours | n days}]
In the display, the figure for bytes/storage_used is the compression ratio after all compression of
data (global and then local) plus the overhead space needed for meta data. In the Original bytes
line, (which includes system overhead) do not expect the amount shown to be the same as the
amount displayed with the
filesys show space
command, Pre-compression line, which does
not include system overhead. The display is similar to the following:
# filesys show compression /backup/usr
Total files: 6,018; bytes/storage_used: 10.7
Original Bytes: 6,599,567,913,746
Globally Compressed: 992,690,774,605
Locally Compressed: 608,225,239,283
Meta-data: 7,329,091,080