Ryusuke, Thank you very much for you answer! Does anyone run MySQL on NILFS or is the random nature of database access poorly suited to good performance on NILFS? -J On Wed, Nov 10, 2010 at 6:03 PM, Ryusuke Konishi <ryusuke@xxxxxxxx> wrote: > Hi, > On Wed, 10 Nov 2010 12:10:25 -0700, "Jason J. W. Williams" wrote: >> Hello, >> I'm looking at NILFS as a possible alternative to BTRFS for our move >> off of ZFS. Looking at the description of how NILFS works, it seems >> like it's one big log. New records go on the front. My question is how >> does space eventually get recaptured when you delete files? Does the >> log get rewritten/compacted regularly? >> >> -J > > Yes, a garbage collector daemon does that. It copies "live" blocks to > the tail from the head of the log, and then frees some obsolete > segments from the log head. > > Try "lssu" command to see how it works. > > By default, the garbage collector (nilfs_clearned) will start when the > amount of free space falls below 10% of the disk space. > > You can change it by modifying /etc/nilfs_cleanered.conf. > > Regards, > Ryusuke Konishi > -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
