Extracting FFS from FreeBSD

[Daniel Gustafsson]

It´s true that it may be overkill to extract FFS for my needs.

The functionallity that I am after is:
1. Read/Write etc.
2. 1 GB Partitions.
3. Few reads and writes to disk.
4. RAM footprint between 200-800K
5. Blockbased (blocksize 4-8K).
6. Configurable.
7. Free.
8. Multi-user (I will integrate the FS with a RTOS)
9. Provides a RAM disk than can be modified to fit "any" secondary storage
used.

NOTE: The above configuration is for the optimal FS.

Does someone have any tips on file systems that fit this puropse. I have
made some research but hasn't yet found anything adeuquate.

//Daniel


>-----Original Message-----
>From: Daniel Ellard [mailto:ellard at eecs.harvard.edu] 
>Sent: Monday, October 18, 2004 12:48 PM
>To: Daniel Gustafsson
>Cc: freebsd-fs at freebsd.org
>Subject: Re: Extracting FFS from FreeBSD
>
>On Mon, 18 Oct 2004, Daniel Gustafsson wrote:
>
>> I am working in a project which is in need of a stand-alone 
>file system and
>> I am interested in extracting FFS from BSD and modyfi it to 
>a stand-alone
>> module. I have some questions before I begin:
>
>I also have some questions before you begin :-) They all follow from
>your last question.
>
>Do you really need FFS or will something simpler do the job?  What
>functionality do you need to support?  (Has anyone done this before?)
>
>My suspicion is that if all you need is a simple user-level file
>system, then you can find something already written that will do most
>or all of what you want -- unless you need something special.  If you
>can't find anything, it's probably faster to write a simplistic file
>system on your own than to dis-tangle FFS from the rest of the kernel.
>
>-Dan
>
>