Re: Migrate from DSE (Datastax) to Apache Cassandra

Ok found a solution for this problem. I deleted the system's keyspace directory and restarted COSS and it was rebuilt. rm -rf /var/lib/cassandra/data/system A bit drastic but I'll test it also on a multi-node cluster. On Thu, Aug 17, 2017 at 3:57 PM, Ioannis Zafiropoulos

Re: Migrate from DSE (Datastax) to Apache Cassandra

Thanks Felipe and Erick, Yes, your comment helped a lot, I was able to resolve that by: ALTER KEYSPACE dse_system WITH replication = {'class': 'SimpleStrategy', 'replication_factor':'1'}; Another problem I had was with CentOS release 6.7 (Final) I was getting glibc 2.14 not found. Based on this

Re: Migrate from DSE (Datastax) to Apache Cassandra

Ioannis, As some people already said, there's one or two keyspaces that uses EverywhereStrategy, dse_system is one of them, if I'm not wrong. You must remember to change them to a community strategy or it will fail. --

Re: Migrate from DSE (Datastax) to Apache Cassandra

We use NetworkTopologyStrategy as the replication strategy. The only DSE specific features we use (left untouched by default) are: authenticator: com.datastax.bdp.cassandra.auth.DseAuthenticator authorizer: com.datastax.bdp.cassandra.auth.DseAuthorizer role_manager:

Re: Migrate from DSE (Datastax) to Apache Cassandra

I agree with Jeff, it’s not necessary to launch a new cluster for this operation. > On Aug 15, 2017, at 7:39 PM, Jeff Jirsa wrote: > > Or just alter the key space replication strategy and remove the DSE specific > strategies in favor of network topology strategy > > > --

Re: Migrate from DSE (Datastax) to Apache Cassandra

Or just alter the key space replication strategy and remove the DSE specific strategies in favor of network topology strategy -- Jeff Jirsa > On Aug 15, 2017, at 7:26 PM, Erick Ramirez wrote: > > Ioannis, it's not a straightforward process to migrate from DSE to COSS.

Re: Migrate from DSE (Datastax) to Apache Cassandra

Ioannis, it's not a straightforward process to migrate from DSE to COSS. There are some parts of DSE which are not recognised by COSS, e.g. EverywhereStrategy for replication only known to DSE. You are better off standing up a new COSS 3.11 cluster and restore app keyspaces to the new cluster.

Re: Migrate from DSE (Datastax) to Apache Cassandra

Haven't done it for 5.1 but went smoothly for earlier versions. If you're not using any of the additional features of DSE, it should be OK. Just change any custom replication strategies before migrating and also make sure your yaml options are compatible.

Migrate from DSE (Datastax) to Apache Cassandra

Hi all, We have setup a new cluster DSE 5.1.2 (with Cassandra 3.11.0.1758) and we want to migrate it to Apache Cassandra 3.11.0 without loosing schema or data. Anybody, has done it before? Obviously we are going to test this, but it would be nice to hear if somebody else has gone through with