Thanks for the clarification. A follow up question, then, given *once joined all nodes are equal*, is that: should the node A dies or taken out of the group, the remaining three node group (with B, C and D) would continue to function properly, correct? [somewhere I saw the term "downstream" nodes was used, and I am not clear what that meant in the context of a mesh-connected group] Thanks again -----Original Message----- From: Craig Ringer [mailto:craig@xxxxxxxxxxxxxxx] Sent: Wednesday, June 07, 2017 5:59 PM To: Zhu, Joshua <jzhu@xxxxxxxxxxxxxx> Cc: pgsql-general@xxxxxxxxxxxxxx Subject: Re: How does BDR replicate changes among nodes in a BDR group On 8 June 2017 at 04:50, Zhu, Joshua <jzhu@xxxxxxxxxxxxx> wrote: > How does BDR replicate a change delta on A to B, C, and D? It's a mesh. Once joined, it doesn't matter what the join node was, all nodes are equal. > e.g., A > replicates delta to B and D, and B to C, or some other way, or not > statically determined? Each node replicates to all other nodes in an undefined order determined by network timing etc. -- Craig Ringer http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
