Re: [Gnu-arch-users] Re: implicit discussion

[Martin Pool]

It looks(?) like in your previous mail you counted files and
multiplied by block sizes.  This is pretty good, but might not count
space used by expansion of directories or any other internally used
blocks.

I was curious to measure how much using explicit-ids reduces the space
available:


kate linux% df -T .           
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda3     ext3    20158332   5250564  13883768  28% /home

kate linux% tla get --no-pristine linus--release--2.6.5 2.6.5-check
* from revision library: address@hidden/linus--release--2.6.5--version-0
* tree version set address@hidden/linus--release--2.6.5

kate linux% df -T .                                                
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda3     ext3    20158332   5476816  13657516  29% /home

kate linux% cd 2.6.5-check 
kate 2.6.5-check% tla inventory --source|xargs tla add

kate 2.6.5-check% df -T .                                                       
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda3     ext3    20158332   5545728  13588604  29% /home


So the tree by itself uses about 226252kB, and adding explicit ids
consumes another 68912kB, which is a remarkably large amount.  On the
other hand, it is only 0.1% of my very ordinary 70GB disk, so I don't
think it matters very much.

(It might be interesting to try this on reiserfs, but I don't have one
handy.)

-- 
Martin