[GSoC 2017] New Idea about rsync

[Wang Shanker]

Sorry for that. BTW, I'm curious about the relation between samba and
rsync. 

Miao Wang
> 在 2017年3月16日，08:08，Jeremy Allison <jra at samba.org> 写道：
> 
> On Wed, Mar 15, 2017 at 02:08:20AM +0800, Shanker Wang via samba-technical wrote:
>> Hi, there
>> 
>> Hope this e-mail finds you well. I'm interested in GSoC program. And
>> I have an idea about the tool rsync.
>> 
>> I've been one of the admins of TUNA mirror site (mirrors.tuna.tsinghua.
>> edu.cn), which provides mirrors for a large amount of open source 
>> softwares. Late last year, as one of the top two mirror sites in China,
>> rsync request from other sites made the load on our storage system 
>> grow largely. I realized that to initialize a rsync connection, the 
>> requested directory would be scanned recursively, which was making 
>> massive IO operations and causing cache miss. To reduce the stress, 
>> I did some modification to `rsync` and was able to cache the attributes 
>> of the files. The result was fine, and is published on 
>> https://github.com/tuna/rsync and further documentation is on  
>> https://github.com/tuna/rsync/blob/master/README-huai.md
>> 
>> The modification itself was successful. During the process of the modifi-
>> cation, however, I found rsync is lack of documentation, especially the
>> communication protocol. [https://rsync.samba.org/how-rsync-works.html]
>> was one of a few documents for my reference. I noticed that samba is
>> participating the 2017 GSoC project and rsync is maintained by you. As
>> a result, I wonder if I can do something for the documentation for the
>> rsync protocol.
>> 
>> The achievement of this idea, as I expect, will include a detailed document
>> about the whole rsync protocol, which can be relied on if someone is 
>> working on another implementation of the rsync. I will document the 
>> latest protocol, as well as historical versions if there is time left.
>> 
>> I wonder if this idea is appropriate for a summer project. I also need 
>> your suggestion on my idea.
> 
> Hi Miao,
> 
> I'm sorry, you're asking on the wrong mailing list. This list if
> for the Samba project, not rsync. Although it's hosted on samba.org,
> it's not maintained here.
> 
> Regards,
> 
> 	Jeremy.

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