On Sun, Aug 16, 2009 at 08:20:31PM +0200, Alexander Burger wrote:
> from the letters A .. O. With that, an object might look like {1},
> {123}, {A45}, {CDE7654321} and so on.
Oops, I forgot the point I actually wanted to explain ;-)
With the above naming scheme, the splitting in directories for blobs
will be handled differently:
If we would split a symbol like {CDE7654321} in the same way as on the
32-bit version, we would get rather long path names
blob/app/C/D/E/7/6/5/4/3/2/1.ext
and directories with a low branching factor (16 or 8).
Instead, I will keep the complete file number specification (here "CDE")
as a single top-level directory, and then always group two octal numbers
together to get a branching factor of 64 again:
blob/app/CDE/76/54/32/1.ext
This seems more reasonable to me. Praxis has shown that only a few
database files per application actually contain blobs, so that the top
level directories (here "CDE") would not be so very many. In total, the
pathes will be more compact.
Cheers,
- Alex
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