On Wed, Mar 27, 2013 at 11:53 AM, Marc MERLIN <marc@xxxxxxxxxxx> wrote: > > Is my feeling of slower boot wrong, or is zlib also noticeably slower than > lzo to read and decompress? > Lzo compression should be faster in every aspect than zlib, especially for reading. But having said that, btrfs won't recompress any existing files just because you switch your mount option from lzo to zlib. Only newly written files will be zlib, and btrfs will leave the lzo-compressed files alone unless they are re-written, or you expressly recompress them using the defrag tool. If you were to take a snapshot of your root partition, and reboot to the snapshot as the new root with zlib compression, you could make some side-by-side comparisons of boot time to clarify your impressions. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
