Re: any risks with changing replication factor on live production cluster without downtime and service interruption?

2020-05-24 Thread Oleksandr Shulgin
On Fri, May 22, 2020 at 9:51 PM Jeff Jirsa wrote: > With those consistency levels it’s already possible you don’t see your > writes, so you’re already probably seeing some of what would happen if you > went to RF=5 like that - just less common > > If you did what you describe you’d have a 40% cha

Re: Cassandra Delete vs Update

2020-05-24 Thread Jeff Jirsa
In 2.2 and earlier, cql row deletes appear as range tombstones All Range tombstones for a cql PARTITION get read into a list (I think it’s literally RangeTombstoneList.java But I’m not at a computer to check ) at the start of a read command and held in memory to reconcile the read Because they

Re: Cassandra Delete vs Update

2020-05-24 Thread Tobias Eriksson
Hi Jeff Could you elaborate on the statement that you made : “CQL Row level tombstones don’t matter in cassandra 3+ - they’re just point deletes after the storage engine rewrite.” Are you saying that a row level delete is not like other tomestones ? if so how are they different ? I tried to googl

nodetool status shows wrong cluster topology

2020-05-24 Thread Tadevos Papoyan
Hi all, I have cassandra cluster (v3.11.6 with GossipingPropertyFileSnitch) with 2 datacenters named Zone1 and Zone2 each having 2 nodes. When all nodes are up "nodetool status" shows correct cluster topology. When I bring down all nodes except one, remaining node still shows correct topology.