Re: when is it decided that extent pointer is to be created in reiser4

[Hans Reiser <reiser@namesys.com>]

Pallavi Dalya wrote:

>hello,
>
>     as far as i know tree based file systems use
>extents for managing free space. does reiser4 use a
>bitmap based method or extents to keep track of used
>and free blocks.
>  
>
bitmap.

>      another issue is that when i tried storing a
>small file an extent pointer was created for the file
>which was also the case for a large file. but to my
>knowledge extent pointers are created for large files
>and in some file systems there is a fixed limit to the
>file size after which it is assigned an extent
>pointer.
>  
>
we store in formatted nodes until the file reaches ~16k in size.

>wat is the policy used in reiser4 to decide which
>files should be stored using extent pointers and which
>should not.
>      also from what i have observed each file has a
>unique key representing it in reiser4. is there any
>specific key generation algorithm for file names and
>if yes where could i find it. is it possible that
>instead of passing single file names to the key
>generation algorithms we could pass the entire path to
>generate a unique key.
>  
>
If you have a limit on the path length, or you make keys variable in 
length, yes.

>________________________________________________________________________
>Yahoo! Messenger - Communicate instantly..."Ping" 
>your friends today! Download Messenger Now 
>http://uk.messenger.yahoo.com/download/index.html
>
>
>  
>