Home > Storage > PowerScale (Isilon) > Product Documentation > Data Protection > Dell PowerScale OneFS: Writable Snapshots > Verifying space efficiency on a writable snapshot
For more detail, the ‘isi quota quotas view’ CLI command provides a thorough appraisal of a writable snapshot’s directory quota domain. This information includes physical, logical, and storage efficiency metrics plus a file count. For example:
# isi quota quotas view /ifs/test/wsnap1 directory
Path: /ifs/test/wsnap1
Type: directory
Snapshots: No
Enforced: Yes
Container: No
Linked: No
Usage
Files: 10
Physical(With Overhead): 32.00k
FSPhysical(Deduplicated): 32.00k
FSLogical(W/O Overhead): 76.00
AppLogical(ApparentSize): 0.00
ShadowLogical: -
PhysicalData: 0.00
Protection: 0.00
Reduction(Logical/Data): None : 1
Efficiency(Logical/Physical): 0.00 : 1
Over: -
Thresholds On: fslogicalsize
ReadyToEnforce: Yes
Thresholds
Hard Threshold: -
Hard Exceeded: No
Hard Last Exceeded: -
Advisory: -
Advisory Threshold Percentage: -
Advisory Exceeded: No
Advisory Last Exceeded: -
Soft Threshold: -
Soft Threshold Percentage: -
Soft Exceeded: No
Soft Last Exceeded: -
Soft Grace: -
This information is also available from the OneFS WebUI by going to File system > SmartQuotas > Generated reports archive > View report details. For example:
Also, the ‘isi get’ CLI command can be used to inspect the efficiency of individual writable snapshot files. First, run the following command syntax on the chosen file in the source snapshot path (in this case /ifs/test/source).
Note: In the example below, the source file, /ifs//test/prod/testfile1, is reported as 147 MB in size and occupying 18019 physical blocks:
# isi get -D /ifs/test/prod/testfile1.zip
POLICY W LEVEL PERFORMANCE COAL ENCODING FILE IADDRS
default 16+2/2 concurrency on UTF-8 testfile1.txt <1,9,92028928:8192>
*************************************************
* IFS inode: [ 1,9,1054720:512 ]
*************************************************
*
* Inode Version: 8
* Dir Version: 2
* Inode Revision: 145
* Inode Mirror Count: 1
* Recovered Flag: 0
* Restripe State: 0
* Link Count: 1
* Size: 147451414
* Mode: 0100700
* Flags: 0x110000e0
* SmartLinked: False
* Physical Blocks: 18019
However, when running the ‘isi get’ CLI command on the same file within the writable snapshot tree (/ifs/test/wsnap1/testfile1), the writable, space-efficient copy now only consumes five physical blocks, as compared with 18019 blocks in the original file:
# isi get -D /ifs/test/wsnap1/testfile1.zip
POLICY W LEVEL PERFORMANCE COAL ENCODING FILE IADDRS
default 16+2/2 concurrency on UTF-8 testfile1.txt <1,9,92028928:8192>
*************************************************
* IFS inode: [ 1,9,1054720:512 ]
*************************************************
*
* Inode Version: 8
* Dir Version: 2
* Inode Revision: 145
* Inode Mirror Count: 1
* Recovered Flag: 0
* Restripe State: 0
* Link Count: 1
* Size: 147451414
* Mode: 0100700
* Flags: 0x110000e0
* SmartLinked: False
* Physical Blocks: 5
More information about OneFS commands and feature configuration is available in the OneFS Administration Guide.