[Building Sakai] Creating Mirrors of files

[Shoaib Chaudhary]

Hedrick,

Thank you for your comprehensive reply please consider the following
statements of my problem.

I have configure Sakai on three different machines. All machines are running
Windows Server 2003.

   1. Database Server running Oracle 10g
   2. Sakai Web Server running Tomcat 5.5
   3. File Server for storing files

I have defined mechanism for Database and Web Server. Now I want to protect
my Sakai file system containing binary files of the system (most probably
site contents, student assessment, lectures lab material etc.) I want to
define some automatic method that can help me in recovering file server in
case of desaster management. Let suppose hard Drive crash or fail at time. I
want my data protected in that case. For that I thought of mirroring, for
keeping the copy of file on some backup file server so that  can use that
server in case of my real server got fail to make the system running 24/7.

Hopefully you will got the problem, Looking forward for your kind reply.


On Sat, Nov 6, 2010 at 06:19, Hedrick Charles <hedrick at rutgers.edu> wrote:

> What are you trying to protect against?
>
> I assume most of us do a couple of levels of protection. Start with RAID.
> Most operating systems have support built into the operating system in the
> file manager. We need to know which operating system you're using to give
> advice. RAID will protect against failure of a single disk drive, and in
> some configurations, more than one. If you are very careful it can also
> protect against failure of a disk controller. However all of your disks will
> be online on a single system, so in theory a software failure could still
> lose the whole thing. So could a typo by an operator, and to be honest
> that's more common these days than hardware failure. (I have lost a couple
> of different RAIDed systems due to operator error, one arguably my own.)
>
> If you want to protect against that you need to separate copies of the file
> system on two systems, possibly in two locations. There are technologies
> that can do that, but again they depend upon your operating system. And this
> may not be easy to set up and manage. Be aware that if you keep two exact
> copies and they synchronize in real time, some software failures and
> operator errors will simply propagate to the backup, so this isn't a
> replacement for disaster recovery backups.
>
>
>
> On Nov 1, 2010, at 7:27:10 AM, Shoaib Chaudhary wrote:
>
> Hello,
>
> Can you please guide me about RAID I haven't use it before
>
> Many Thanks
>
> On Mon, Nov 1, 2010 at 16:18, Steve Swinsburg <steve.swinsburg at gmail.com>wrote:
>
>> Hi,
>>
>> In that case you want to use RAID on your filesystem.
>>
>> cheers,
>> Steve
>>
>>
>>
>> On 01/11/2010, at 10:10 PM, Shoaib Chaudhary wrote:
>>
>> Hi Steve,
>>
>> No, actually i want a mirror based file storing at two different locations
>> of my hard drive or two different hard drives so that in case of if HDD
>> crash I can recover data from other location.
>>
>> On Mon, Nov 1, 2010 at 13:47, Steve Swinsburg <steve.swinsburg at gmail.com>wrote:
>>
>>> Hi,
>>>
>>> You could store that file in a central spot and make it public and then
>>> just link it in the other sites. Or automate that via the web services or
>>> similar.
>>>
>>> cheers,
>>> Steve
>>>
>>> On 01/11/2010, at 6:43 PM, Shoaib Chaudhary wrote:
>>>
>>> Hello,
>>>
>>> Is there any configurations in sakai.properties file that create a mirror
>>> of file?
>>> I mean that file A get stored to path A and B simultaneosly.
>>>
>>> --
>>> Regards
>>> *MUHAMMAD SHOAIB* | Software Engineer
>>>
>>> _______________________________________________
>>> sakai-dev mailing list
>>> sakai-dev at collab.sakaiproject.org
>>> http://collab.sakaiproject.org/mailman/listinfo/sakai-dev
>>>
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>>>
>>
>>
>> --
>> Regards
>> *MUHAMMAD SHOAIB* | Software Engineer
>> National University of Computer and Emerging Sciences
>> A. K. Brohi Road (Near Police Line) H11/4 Islamabad
>> Tel +92-(51)-111-128-128 Ext 344  Cell +92-(331)-544213
>> muhammad.shoaib at nu.edu.pk
>>
>> *As a muslim I have no duty to allow myself to be cheated, but I have the
>> duty to be a fighter **for *
>> ***truth and justice as **It is always more difficult to fight against
>> faith than against knowledge*
>> *
>> *
>> No part of this email and its attached contents should be reproduced,
>> published in any form by any means, electronic or mechanical including
>> photocopy or any information storage or retrieval system nor should the
>> material be disclosed to third parties
>>
>>
>>
>
>
> --
> Regards
> *MUHAMMAD SHOAIB* | Software Engineer
> National University of Computer and Emerging Sciences
> A. K. Brohi Road (Near Police Line) H11/4 Islamabad
> Tel +92-(51)-111-128-128 Ext 344  Cell +92-(331)-544213
> muhammad.shoaib at nu.edu.pk
>
> *As a muslim I have no duty to allow myself to be cheated, but I have the
> duty to be a fighter **for *
> ***truth and justice as **It is always more difficult to fight against
> faith than against knowledge*
> *
> *
> No part of this email and its attached contents should be reproduced,
> published in any form by any means, electronic or mechanical including
> photocopy or any information storage or retrieval system nor should the
> material be disclosed to third parties
>
> _______________________________________________
> sakai-dev mailing list
> sakai-dev at collab.sakaiproject.org
> http://collab.sakaiproject.org/mailman/listinfo/sakai-dev
>
> TO UNSUBSCRIBE: send email to
> sakai-dev-unsubscribe at collab.sakaiproject.org with a subject of
> "unsubscribe"
>
>
>


-- 
Regards
*MUHAMMAD SHOAIB* | Software Engineer
National University of Computer and Emerging Sciences
A. K. Brohi Road (Near Police Line) H11/4 Islamabad
Tel +92-(51)-111-128-128 Ext 344  Cell +92-(331)-544213
muhammad.shoaib at nu.edu.pk

_________________________________________________________________________________________

*As a Muslim I have no duty to allow myself to be cheated, but I have the
duty to be a fighter **for truth and justice as **It is always more
difficult to fight against faith than against knowledge*

No part of this email and its attached contents should be reproduced,
published in any form by any means, electronic or mechanical including
photocopy or any information storage or retrieval system nor should the
material be disclosed to third parties
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