As far as I understood, "NOCOW" means that modified parts of files be rewritten into place, whereas compression causes compressed blocks of variable sizes to be created (depending upon their compression ratio). Changing a block in a file will most probably change its compressed size, and then you see why it cannot be rewritten into place...
Somebody correct me if I'm wrong ;-) Le lundi 27 octobre 2014, 14:06:36 Marc Dietrich a écrit : > > > > « Compression does not work for NOCOW files » is clearly stated in > > > > https://btrfs.wiki.kernel.org/index.php/Compression#How_does_compression_i > > nt eract_with_direct_IO_or_COW.3F > > ah, sorry, I somehow overlooked this. > > Thanks > > Marc -- Swâmi Petaramesh <sw...@petaramesh.org> http://petaramesh.org PGP 9076E32E Tout être manifesté est là pour embaumer, pour exprimer la Présence. -- Jean-Marc Mantel -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
