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Re: [ANNOUNCEMENT] [1.7] Updated: coreutils-7.0-1
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According to Christian Franke on 12/16/2008 1:18 PM:
>
> On my XP SP2, st_size is always 0, even for large and fragmented
> directories.
Likewise for all the machines I have access to. Maybe it is just Vista
that added directory size tracking?
>>
>> Interesting question. NTFS and FAT filesystems are name-sorted by
>> default. AFAIK directory changes on FAT are done in-memory, resorted,
>> and then written back as a whole block to disk.
>
> XP does not sort a FAT directory.
Most readdir() implementations return files either in creation order or
name order. But what matters for the optimization done by coreutils is
inode order - on file systems where increasing inodes represent increasing
disk positions, then stat'ing files in inode order results in less seek
time than visiting files in name order. I guess what needs to happen now
is actually testing whether NTFS is like ext3 in benefiting from the inode
sort.
- --
Don't work too hard, make some time for fun as well!
Eric Blake ebb9@byu.net
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