Same thing as Yahoo or same thing as Deepak suggests?
Alan.
On Apr 5, 2011, at 2:05 PM, Dmitriy Ryaboy wrote:
Google apparently does the same with GFS / MR, at least by my
reading of the Megastore paper.
On Tue, Apr 5, 2011 at 9:59 AM, Alan Gates <[email protected]>
wrote:
The concern I have with that approach is I don't think you can
guarantee that Hadoop will never assign tasks to read from the
geographically distributed nodes. At Yahoo we have separate Hadoop
clusters in separate geographic locations and use tools such as
distcp to move data between them.
Alan.
On Apr 5, 2011, at 6:14 AM, [email protected] wrote:
I wish to have a Hadoop cluster with DR (Disaster Recovery), for
which I need to have the data backup at a geographically different
location. (if there's an eqrthquake or tsunami that hits one
location).
I was thinking along these lines - Make Hadoop rack-aware, set a
replication factor of 4, and have geographically separated nodes
under a single Hadoop namespace, and make sure that atleast one
replica gets copied to the other data centre. Basically, I want to
have an Active-Active kind of a setup. Is this a feasible idea? If
not, why?
Assume that bandwidth is not a limitation - I can have unlimited
bandwidth - DR is the primary concern - data just cannot be lost.
If this idea is not good, what is the best way to have an Active-
Active DR Hadoop setup?
This question may not be PIG related, but I thought folks here can
suggest some good ideas. I am posting the same question on the
Hadoop General mailing list also.
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