Hello, I'm working with a 9.4-bdr cluster and want to move away from BDR tech all together. So my idea was to follow instructions on http://bdr-project.org/docs/stable/ to first strip the node from BDR making it into "regular" node and then moving the data from this node to official 9.4 instance.
Environment: BDR_Node_1 BDR_Node_2 Regular_Node_1 Steps done on BDR_Node_2 1. Part node from BDR cluster http://bdr-project.org/docs/stable/node-management-removing.html 2. Remove BDR from node http://bdr-project.org/docs/stable/node-management-disabling.html 3. Create SR slot select pg_create_physical_replication_slot('new_cluster_node'); After this. Steps done on Regular_Node_1, which is 9.4.22 1. Init the new node with pg_basebackup with source being BDR_Node_1 2. Update recovery.conf and postgres.conf 3. Start it with pg_ctl All seems to be working well, but for this: select * from information_schema.sequences; produces "[XX000] ERROR: cache lookup failed for index 899807" for all of the DBs that were configured with BDR with various OID. I can not reproduce this error, when running query on any of the DBs on 9.4-bdr node. Does anyone have any idea what may be causing this ? Due to this I'm also unable to run pg_dump on new_cluster_node - it also results in the same error. That said. For more context - If it worked, next steps would have been to 1. Deactivate virtual IP on BDR_Node_2 2. Check for no replication lag on BDR_Node_2 slot "new_cluster_node" 3. Promote Regular_Node_1 4. Activate virtual IP on BDR_Node_2 Build the new 9.4 cluster from there on. Any ideas / comments will be much appreciated! Thank you in advance. Best regards, Janis Puris
