On Tue, Jun 16, 2020 at 06:42:52PM +0530, Ashutosh Bapat wrote: > > Is there some mapping between GXID and XIDs allocated for each node or > > will each node use the GXID as XID to modify the data? Are we fine > > with parking the work for global snapshots and atomic visibility to a > > separate patch and just proceed with the design proposed by this > > patch? > > Distributed transaction involves, atomic commit, atomic visibility > and global consistency. 2PC is the only practical solution for atomic > commit. There are some improvements over 2PC but those are add ons to > the basic 2PC, which is what this patch provides. Atomic visibility > and global consistency however have alternative solutions but all of > those solutions require 2PC to be supported. Each of those are large > pieces of work and trying to get everything in may not work. Once we > have basic 2PC in place, there will be a ground to experiment with > solutions for global consistency and atomic visibility. If we manage > to do it right, we could make it pluggable as well. So, I think we > should concentrate on supporting basic 2PC work now.
Very good summary, thank you. -- Bruce Momjian <br...@momjian.us> https://momjian.us EnterpriseDB https://enterprisedb.com The usefulness of a cup is in its emptiness, Bruce Lee
