Comments on: Quickly get up to 5% more disk space from your ext3 volumes http://blog.mindlesstechie.net/2008/12/23/quickly-get-up-to-5-more-disk-space-from-your-ext3-volumes/ An Eclectic IT Repository Fri, 01 Apr 2011 01:19:34 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: John Alberts http://blog.mindlesstechie.net/2008/12/23/quickly-get-up-to-5-more-disk-space-from-your-ext3-volumes/comment-page-1/#comment-92 John Alberts Sat, 27 Dec 2008 01:27:43 +0000 http://blog.mindlesstechie.net/?p=97#comment-92 I tried to find what you were referring to about it degrading performance, and the only thing I could find is this: <blockquote>> > Just as a side note but do you really want to reserve 5% > > of your 2TB partition for root? The filesystem performance will degrade if you eat into the last 5%, but as long as you're willing to live with this tradeoff, and assuming you don't need to reserve space for things like log files, then sure, you can always drop the percentage. </blockquote> So, this seems to indicated that performance will only be degraded if you start using that final 5%. It's good to know, but for me, in some situations, the performance trade off is worth it. I tried to find what you were referring to about it degrading performance, and the only thing I could find is this:

> > Just as a side note but do you really want to reserve 5%
> > of your 2TB partition for root?

The filesystem performance will degrade if you eat into the last 5%,
but as long as you’re willing to live with this tradeoff, and assuming
you don’t need to reserve space for things like log files, then sure,
you can always drop the percentage.

So, this seems to indicated that performance will only be degraded if you start using that final 5%. It’s good to know, but for me, in some situations, the performance trade off is worth it.

]]> By: Carlos http://blog.mindlesstechie.net/2008/12/23/quickly-get-up-to-5-more-disk-space-from-your-ext3-volumes/comment-page-1/#comment-91 Carlos Fri, 26 Dec 2008 23:03:20 +0000 http://blog.mindlesstechie.net/?p=97#comment-91 Unfortunately this is a not so great tip. It could degrade perfomarce of your hard disk a lot. I know it because I tried for a while and the hdd was very slow. Theodore Ts'o, the mantainer of ext{3,4} advices to let this percentage as it is. If you don't believe me, you can google for it. Unfortunately this is a not so great tip. It could degrade perfomarce of your hard disk a lot. I know it because I tried for a while and the hdd was very slow. Theodore Ts’o, the mantainer of ext{3,4} advices to let this percentage as it is. If you don’t believe me, you can google for it.

]]> By: John Alberts http://blog.mindlesstechie.net/2008/12/23/quickly-get-up-to-5-more-disk-space-from-your-ext3-volumes/comment-page-1/#comment-90 John Alberts Wed, 24 Dec 2008 21:37:15 +0000 http://blog.mindlesstechie.net/?p=97#comment-90 Actually, it does this for any ext3 file system, regardless of the mount point. So, if you create seperate ext3 partitions for /, /usr, /home, /var, /boot, you've lost 5% of the blocks for each of those partitions. I'm not sure if it's possible to disable this completely or not, but I see no reason not to reduce it to 1% instead of 5%. I haven't had a chance to try something like 'tune2fs -m 0 /dev/sda1' on an unimportant partition. Let me know if completely disabling it works for you. Actually, it does this for any ext3 file system, regardless of the mount point. So, if you create seperate ext3 partitions for /, /usr, /home, /var, /boot, you’ve lost 5% of the blocks for each of those partitions. I’m not sure if it’s possible to disable this completely or not, but I see no reason not to reduce it to 1% instead of 5%. I haven’t had a chance to try something like ‘tune2fs -m 0 /dev/sda1′ on an unimportant partition.
Let me know if completely disabling it works for you.

]]> By: Aniruddha http://blog.mindlesstechie.net/2008/12/23/quickly-get-up-to-5-more-disk-space-from-your-ext3-volumes/comment-page-1/#comment-89 Aniruddha Wed, 24 Dec 2008 13:09:34 +0000 http://blog.mindlesstechie.net/?p=97#comment-89 Great tip! What about non root (/) partitions? Is it possible and desirable to disable the reserved-blocks-percentage on non root partitions? Great tip! What about non root (/) partitions? Is it possible and desirable to disable the reserved-blocks-percentage on non root partitions?

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