On Thu, 31 Mar 2011 21:19:27 +0200, "[email protected] " wrote: > There should be a way to make automatic checkpoints less frequent. On > the busy ssd I have about 7 cp every second. If it were for example > once every 5 minutes then one could set garbage removal every few > days.
If your application does't issue fsync, this can be done by increasing "commit-interval" and "watermark" parameters: The commit-interval is creation cycle of checkpoints while there is some change. The watermark is a threshold count of dirty data blocks. When the number of dirty blocks exceeds this threshold, a checkpoint creation will be triggered. These parameters are adjustable by "nilfs-tune" tool which is included in the recent nilfs-utils. For instance, you can change the commit-interval to 60 seconds by # nilfs-tune -i 60 /dev/sdb1 where /dev/sdb1 is the target nilfs partition. And, watermark is ajustable by # nilfs-tune -m <watermark> /dev/sdb1 See manpage of nilfs-tune for details. > Also garbage removal should have option to clean only if like 90% of > drive is used. there is no need to remove cp-s when there is still > many GB of space left. The cleaner included in the recent nilfs-utils already supports this feature. Thanks, Ryusuke Konishi -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
