Home > Storage > PowerScale (Isilon) > Product Documentation > Data Efficiency > Dell PowerScale OneFS: Data Reduction and Storage Efficiency > Inline reads and writes
When a file write coming from the writeback cache, or coalescer, is determined to be a candidate for data inlining, it goes through a fast write path in BSW. Compression will be applied, if appropriate, before the inline data is written to storage.
The read path for inlined files is similar to that for regular files. However, if the file data is not already available in the caching layers, it is read directly from the inode, rather than from separate disk blocks as with regular files.