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How JR backups data?

 
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Hi Ranchers,
I dont know whether this is a right place or not to ask this question.
I am intetested in knowing how JR backups data [all forums posts]. It is impossible that they are saving on one machine. If that machine crashes then they must have backup of data. How backing up data works? I am asking this at big level, like of JR, Yahoo, hotmail and all other companies who are curious about there records security.

Bye,
Viki.
 
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JavaRanch is hosted by Ejip.net - take a look at their Disaster Recovery FAQ: http://www.ejip.net/faq/dr_faq.jsp
 
Vikrama Sanjeeva
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Hi,
This means that backing up data headache is of EJIP and not of JR. Rather JR pays them for hsoting. In my case, we have whole system deployed on our own servers. So, I was asking this question w.r.t. my case.

Bye,
Viki.
 
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Even though you need to take care of backups yourself, the techniques available are pretty much those that EJIP is using (see the link posted above).
 
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incremental daily backups, plus full backup once a week (or month if your data is more static or not mission critical).
Once a quarter bring a full system backup to a remote site where it is stored in a climate controlled vault.

In addition what we do is have someone take the backup tapes off property every night. He stores them at home and brings only the tapes for the next backup (tapes are rotated on a monthly basis for the incremental backups I think) into the office.

That way either the office of his home can burn down and we don't loose more than a day of work, or both can be destroyed and we loose no more than a few months.

The storage locations are geographically distant, about 100km apart, to ensure no single event can wipe them all out.

If you want better redundancy than that, you want to mirror your life servers as well at distant locations.
Say have one server at your main location which is is kept synchronised in real time with 2 more servers 100km north and south (or east and west) of your location. That way you should never loose more than a few seconds of data.
 
Lasse Koskela
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IBM developerWorks just happened to publish an article about doing automated backups on Linux:
http://www-106.ibm.com/developerworks/library/l-backup/?ca=dnt-527
 
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