Hi Carl, I now this is not exactly answering your question, but it may help with the split.
I have split a multi tenancy cluster several times using a similar process to TLP’s Data Centre Switch: http://thelastpickle.com/blog/2019/02/26/data-center-switch.html However instead of phase 3, we have split the cluster, by changing the seeds definition to only point at nodes within their own DC, and change the cluster name of the new DC. This last step does require a short downtime of the cluster. We have had success with this method, and if you are only want to track the updates to feed into the new cluster, this this will work, however it you want it for anything else then it doesn’t help at all. I can supply more details later if this method is of interest. Thanks Paul Chandler > On 10 Apr 2019, at 22:52, Carl Mueller <carl.muel...@smartthings.com.INVALID> > wrote: > > We have a multitenant cluster that we can't upgrade to 3.x easily, and we'd > like to migrate some apps off of the shared cluster to dedicated clusters. > > This is a 2.2 cluster. > > So I'm trying a trigger to track updates while we transition and will send > via kafka. Right now I'm just trying to extract all the data from the > incoming updates > > so for > > public Collection<Mutation> augment(ByteBuffer key, ColumnFamily update) { > > the names returned by the update.getColumnNames() for an update of a table > with two clustering columns and had a regular column update produced two > CellName/Cells: > > one has no name, and no apparent raw value (bytebuffer is empty) > > the other is the data column. > > I can extract the primary key from the key field > > But how do I get the values of the two clustering columns? They aren't listed > in the iterator, and they don't appear to be in the key field. Since > clustering columns are encoded into the name of a cell, I'd imagine there > might be some "unpacking" trick to that. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-mail: user-h...@cassandra.apache.org
