What is current state of this patch? Does community want CSN based snapshots?
CSN snapshots could give us
1. More scalable GetSnapshotData() calls
2. Faster GetSnapshotData() calls
3. Smaller snapshots which could be passed around more usefully between distributed servers
It depends on the exact design we use to get that. Certainly we do not want them if they cause a significant performance regression.
Now, our company have resources to work on CSN based snapshots for 9.6. If Huawei will not publish their patch, we can pick up this work from last community version of this patch.
Sounds good.
--
Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services