I am not certain about storage efficiencies. Would 10gigs of data with
EXT4 use less diskspace than 10 gigs of data stored in btfrs format.
(What's a gig when terrabyte drives sell for around $60.00.
No idea. But if I recall correctly, when I changed from an ext2
filesystem to a reiser file system total available storage went down
slightly. It wasn't a big deal.
If you want to save a lot of gigs with ext2/3/4 family:
mke2fs -j -N 1000000 -m 1 /dev/sdaxxx
-N is the number of nodes which is calculated as a percentage of the
total disk space (you can also use the -i switch if you prefer). But
1 million inodes is usually more than enough!!! It usually takes
years to fill that even on a maintained production system. If you
have a disk backup with only a couples of files on it, put -N 100,
you'll save space there! Oh, by the way, to see your inodes usage
you have the command : df -i
-m is the percentage reserved for root-owned demon or when your disks
says 100% (with df) but still continue to live. This is where the
space is taken from. On terabytes disks of today, 1% is enough.
Default if 5%. You will save a lot of space here (GBs).
-
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