Re: Things that Longhorn seems to be doing right

["Ihar 'Philips' Filipau" <filia@softhome.net>]

Hans Reiser wrote:
> 
> All that said, the indexes themselves should just be feature enhanced 
> directories accessed via the kernel.  Feature enhancements might include 
> such things as better space efficiency, ordering plugins, etc.
> 

   I still see no point in putting this into kernel space.

   As a proof of concept - if someone wants to try - one can implement 
this system on top of any other fs. in user space.

   open("/aaa.txt") ->
     inode ->
      underlaying_fs.open(itoa(inode)+".meta")
      underlaying_fs.open(itoa(inode)+".data")

   write(fd) -> fd<->inode -> updateindex(inode) + write(inode). [1]

   and so on and so forth. LD_PRELOAD=libcoolfs.so my_cool_app

   in other words file system can be used as smart storage.
   hard links can be 'mis'used to implement search indeces.

[1]  mmap() is the notable problem.

-- 
Ihar 'Philips' Filipau  / with best regards from Saarbruecken.
--
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