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From Michel Segel <michael_se...@hotmail.com>
Subject Re: Replication - ports/hosts
Date Wed, 19 Jun 2013 09:49:37 GMT
What no ack from slave back to master???

Sent from a remote device. Please excuse any typos...

Mike Segel

On Jun 19, 2013, at 12:41 AM, Stack <stack@duboce.net> wrote:

> On Mon, Jun 17, 2013 at 12:06 PM, Patrick Schless <patrick.schless@gmail.com
>> wrote:
>> Working on setting up HBase replication across a VPN tunnel, and following
>> the docs here: [1] (and here: [2]).
>> Two questions, regarding firewall allowances required:
>> 1) The docs say that the zookeeper clusters must be able to reach each
>> other. I don't see any docs on why this is (the high-level diagram doesn't
>> even show a ZK ensemble on the client side). Is it correct that the ZK
>> ensembles need to communicate with each other?
> Yes.  ZK ensemble is the gateway to the cluster whether connecting locally
> or remotely as replication does.
>> 2) What ports are required to be open for inter-cluster Region Server
>> communication? Is it only the slave that needs to accept requests from the
>> master, or does the master also accept incoming requests from the slaves?
> Do you mean master 'cluster' in the above?  If so, yes, the master cluster
> sends data to the slave cluster (master RS to slave RSs).  The
> communication is one way; master to slave cluster.
> If you are asking if hbase masters need to communicate, the answer is no.
> St.Ack
> P.S. Doug, we need to add above to doc

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