Home > Storage > PowerScale (Isilon) > Product Documentation > Data Efficiency > Next-Generation Storage Efficiency with Dell PowerScale Inline Data Reduction > Enabling compression
Since Compression configuration is binary, either on or off across a cluster, it can be easily controlled using the OneFS command-line interface (CLI). For example, the following syntax will enable compression and verify the configuration:
# isi compression settings view
Enabled: No
# isi compression settings modify --enabled=True
# isi compression settings view
Enabled: Yes
Note: Inline compression is enabled by default on the following:
-- New F810 clusters running OneFS 8.2.1 and later
-- New H5600 clusters running OneFS 8.2.2 and later
-- New F600 and F200 clusters running OneFS 9.0 and later
-- F900 clusters running OneFS 9.2 and later
-- H700/7000 and A300/3000 clusters running OneFS 9.2.1 and later
-- F710 and F210 clusters running OneFS 9.7 and later
-- F910 clusters running OneFS 9.8 and later
In a mixed cluster containing other node styles in addition to compression nodes, files will only be stored in a compressed form on F910, F900, F810, F710, F600, F210, F200, H5600, H700/7000, and A300/3000 node pool or pools. Data that is written or tiered to storage pools of other hardware styles will be uncompressed at that time when it moves between pools. A node on the cluster that does not support inline compression can be an initiator for compressed writes in software to a compression node pool. However, this configuration may generate significant CPU overhead for lower powered nodes, such as the A-series hardware and provide only software fallback based compression with lower compressibility.