[gsoc] HTree Directory Index and Journal in ext2fs

[gnehzuil gnehzuil]

2011/4/5 Ivan Voras <ivoras at freebsd.org>

> On 05/04/2011 15:48, gnehzuil wrote:
>
>> Hello,
>>
>> I would like to apply a new project "HTree Directory Index and Journal
>> in ext2fs" in GSoC 2011. This project is not in ideas page. But this
>> project can improve ext2fs in FreeBSD.
>>
>> Last year, I have participated GSoC 2010 and have implemented a
>> preallocation algorithm in ext2fs and make it can read ext4 file system
>> in read-only mode. I have try to read htree dir index in ext4 read-only
>> mode. Yet I don't finish it. I am plan to implement a htree dir index in
>> ext2fs before midterm evaluation.
>>
>> Next I will try to implement journal in ext2fs. I think I can borrow
>> some ideas from WAPBL in NetBSD.
>>
>
> When you say 'journal in ext2fs' do you mean ext3-compatible or something
> different entirely? I don't think that a journalling addition to our ext2fs
> which would not make it compatible with ext3 would be useful.
>

IMHO, I want to add a ext3-compatible journal.

In previously discussion, Pedro and I have mentioned WAPBL and its
performance is awesome. So I want to look at it and maybe I can borrow some
good ideas.


>
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-- 
Liu Zheng
gnehzuil at gmail.com
CNU NetLab
Tsinghua CSCW