>> would like to know if the patch related to CSN based snapshot [2] is a >> precursor for this, if not, then is it any way related to this patch >> because I see the latest reply on that thread [2] which says it is an >> infrastructure of sharding feature but I don't understand completely >> whether these patches are related? >I need some time to study this patch. At first sight it is different.
This patch[2] is almost base on [3], because I think [1] is talking about 2PC and FDW, so this patch focus on CSN only and I detach the global snapshot part and FDW part from the [1] patch. I notice CSN will not survival after a restart in [1] patch, I think it may not the right way, may be it is what in last mail "Needs guarantees of monotonically increasing of the CSN in the case of an instance restart/crash etc" so I try to add wal support for CSN on this patch. That's why this thread exist. > [1] - > https://www.postgresql.org/message-id/CA%2Bfd4k4v%2BKdofMyN%2BjnOia8-7rto8tsh9Zs3dd7kncvHp12WYw%40mail.gmail.com > [2] - https://www.postgresql.org/message-id/2020061911294657960322%40highgo.ca [3]https://www.postgresql.org/message-id/21BC916B-80A1-43BF-8650-3363CCDAE09C%40postgrespro.ru Regards, Highgo Software (Canada/China/Pakistan) URL : www.highgo.ca EMAIL: mailto:movead(dot)li(at)highgo(dot)ca
