cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Lou DeGenaro <lou.degen...@gmail.com>
Subject Re: single instance failover
Date Tue, 22 Nov 2016 19:28:33 GMT
Yes, change rpc_address to node B.

Immutability aside, if Node A Cassandra and Node B Cassandra are using the
same directory on the same shared filesystem, let's call it
/cassandra/state/database,
would that not be a problem?  Or said differently, does not Node A need its
own writable place /cassandra/state/database/nodeA and likewise /cassandra
/state/database/nodeB for Node B's writable place?

Multinode Cassandra may not always be available due to resource
constraints.  Presumably multinode Cassandra for Node B is not free: it
takes up network, cpu, and replicated disk space, no?

Lou.

On 2016-11-22 11:10 (-0500), Vladimir Yudovin <v...@winguzone.com> wrote:
> Hi Lou,>
>
>
>
> do you mean you set  rpc_address (or broadcast_rpc_address) to Node_B_IP
on second machine?>
>
>
>
> &gt;there would be potential database corruption, no?>
>
> Well, so SSTables are immutable, it can lead to unpredictable behavior, I
guess. I don't believe anybody tested such setup before.>
>
>
>
> &gt;Is there any guidance on single instance failover?>
>
> I never saw one, the main Casandra idea that you build multinode
cluster.>
>%

Mime
View raw message