4 ms·

I'm completely new to both Postgres-XC and Postgres-XL, and just started looking at the documentation. It seems that the main structures of the two are similar,

by barosl 12y ago

I'm completely new to both Postgres-XC and Postgres-XL, and just started looking at the documentation. It seems that the main structures of the two are similar, except some features implemented in Postgres-XL like allowing node-to-node data transfer. It is natural, because they've just forked the project. But I think if there are some gotchas in the original project, Postgres-XL would also expose similar problems. What have been your main concerns using Postgres-XC? Any design issues?

mason_s 12y ago
The planner and executor in Postgres-XL is quite different, and direct node-to-node data transfer for MPP parallelism results in big performance gains. Any bugs in XC in the planner and executor would not show up in XL (that is not to say that we in Postgres-XL do not have any of our own bugs :-)). Bugs related to GTM could show up in both, but in Postgres-XL additional precautions have been taken to reduce the likelihood of problems.