incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From David Boxenhorn <da...@taotown.com>
Subject Re: On 0.6.6 to 0.7.3 migration, DC-aware traffic and minimising data transfer
Date Mon, 14 Mar 2011 17:16:25 GMT
How do you write to two versions of Cassandra from the same client? Two
versions of Hector?

On Mon, Mar 14, 2011 at 6:46 PM, Robert Coli <rcoli@digg.com> wrote:

> On Mon, Mar 14, 2011 at 8:39 AM, Jedd Rashbrooke <jedd@visualdna.com>
> wrote:
> >  But more importantly for us it would mean we'd have just the
> >  one major outage, rather than two (relocation and 0.6 -> 0.7)
>
> Take zero major outages instead? :D
>
> a) Set up new cluster on new version.
> b) Fork application writes, so all writes go to both clusters.
> c) Backfill old data to new cluster via API writes.
> d) Flip the switch to read from the new cluster.
> e) Turn off old cluster.
>
> =Rob
>

Mime
View raw message