OwnCloud Sync Client

[kunal ghosh]

Hi all,
Regarding my ownCloud Sync Client GSoC proposal:

Apart from sync-ing the files in the Cloud with its offline copy, i had been

checking out possibilities of peer-to-peer sync . This is in my opinion
do-able over the summer.

Also this could be leveraged (in future) to perform simple collaborative
tasks
(like collaborative document editing) without the need for a central server.

Would such a feature be useful in the client ?

---------- Forwarded message ----------
From: kunal ghosh <kunal.t2 at gmail.com>
Date: Thu, Feb 24, 2011 at 7:16 PM
Subject: Re: [Owncloud] Re: KDE owncloud client
To: kunal ghosh <kunal.t2 at gmail.com>


https://gist.github.com/842166


On Thu, Feb 24, 2011 at 7:10 PM, kunal ghosh <kunal.t2 at gmail.com> wrote:

> Hi all , i have been working on UDP hole punching , and now have a fair
> idea about how it works :)
> I will be implementing a simple file sharing python script, to transfer a
> file from a computer behind a NAT
>  to another behind another NAT.
> will keep all posted.
>
> I have a few ideas / suggestions / questions :
> 1. OwnCloud Could be designed to be either
> *1.1 hosted at a webhost*, like goDaddy.com etc. which will make the data
> available
> via static IP / godaddy(et-al) sub-domain.
> Pros : the data is available though an  FTP client , or a nice web
> interface, very easy to code too ! :)
> Cons: 1. High initial cost 2. The user is not in control of the data ( what
> if the web-server goes down !!)
>
> *1.2 hosted on the users' computer behind a NAT*
> Pros: 1. All the data is with the user 2. Computers in local network do not
> need to access the internet to get the data :)
> Cons: 1. Difficult to make data available to outside world (NAT
> hole-punching) or (reverse-proxy)
> *
> *
>
> OwnCloud could be designed to be a two part system:
> *One part* resident on the OwnCloud users' home computer behind an always
> on internet connection
> protected behind a NAT.
> This part includes the web based front-end , which ownCloud currently has,
> which serves any computers in the Local Network.
> Plus the web-based front end can be used by any one who opts for scenario
> 1.1 above (hosted at a webhost*).*
> *
> *
> *Part Two *could be designed as a sync-client + simple file browser +
> NAT-hole-puncher + simple file server
> This part is always running on the client's home PC (scenario 1.2 hosted on
> the users' computer behind a NAT )
> and does the following:
> It runs on any device (netbook , laptop, desktop) where the user wants to
> edit data (Mobile phones are not included
> as user may just want to access data on the phone (*Comments ?*)
>
> a) this application running on any computer on the *local lan* other than
> the server : requests for files and if the user
> updates the file , sends in the new file back to the server.
>
> b) this application running on any computer outside the NAT : does NAT hole
> punching , to reach the application running
> on the server and then works normally (first retrieving only the files list
> , and then retrieving more files as and when a user asks for it)
>
> c) this application running on the server , facilitates NAT hole punching.
> Serves files to clients, receives updated files
> if any , triggers the *file versioning mechanism * and then saves the
> files.
>
> Concerns In general :
> 1. Authentication : We could use a share-key encryption mechanism , thus
> allowing sharing of you cloud resources with your  friends :)
> 2. Security : We could host OwnCloud inside a Virtual Machine, so in case ,
> someone cracks into the system the damages could
> be sandboxed.
> 3. File versioning mechanism : Candidates : 1) git 2) Mercurial 3)
> ZFileSystem (an OS based versioning mechanism)
> If we go with a virtual machine , we could use FreeBSD as a base OS and ZFS
> as a filesystem based versioning mechanism.
> ZFS is open Sourced, and is a server grade technology part of Solaris 10.
> (video showing ZFS being used in FreeNAS
> http://www.youtube.com/watch?v=16v4jNYH0GI )
>
> 4. WebDav : This afaik doesn't work if the computers are separated by a
> NAT.
>
> my 2cents :) Please let me know if my ideas above work towards what
> OwnCloud is trying to achieve.
> *
> *
> On Mon, Feb 14, 2011 at 4:21 PM, Riccardo Iaconelli <riccardo at kde.org>wrote:
>
>> On Thursday 03 February 2011 23:41:53 Robin Appelman wrote:
>> > I experimented a bit with phpSyncML and I managed to get it integrated
>> in
>> > ownCloud enough to do some basic pim synchronization done.
>> >
>> > I didn't do to much testing yet but it looks like I could drop google
>> > calendar  faster then I expected
>> >
>> > I will commit the plugin soon-ish
>>
>> This is AWESOME!!!
>>
>> Let me know what I can do, if you need any help. :)
>>
>> Bye,
>> -Riccardo
>> _______________________________________________
>> Owncloud mailing list
>> Owncloud at kde.org
>> https://mail.kde.org/mailman/listinfo/owncloud
>>
>>
>
>
> --
> regards
> -------
> Kunal Ghosh
> Dept of Computer Sc. & Engineering.
> Sir MVIT
> Bangalore,India
>
> permalink: member.acm.org/~kunal.t2 <http://member.acm.org/%7Ekunal.t2>
> Blog:kunalghosh.wordpress.com
> Website:www.kunalghosh.net46.net
>
>
>

--
regards
-------
Kunal Ghosh
Dept of Computer Sc. & Engineering.
Sir MVIT
Bangalore,India

permalink: member.acm.org/~kunal.t2 <http://member.acm.org/%7Ekunal.t2>
Blog:kunalghosh.wordpress.com
Website:www.kunalghosh.net46.net





--
regards
-------
Kunal Ghosh
Dept of Computer Sc. & Engineering.
Sir MVIT
Bangalore,India

permalink: member.acm.org/~kunal.t2 <http://member.acm.org/%7Ekunal.t2>
Blog:kunalghosh.wordpress.com
Website:www.kunalghosh.net46.net
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