Re: Sync Rep: First Thoughts on Code

Simon Riggs wrote:
> I am truly lost to understand why the *name* "synchronous replication"
> causes so much discussion, yet nobody has discussed what they would
> actually like the software to *do*

It's the color of the bikeshed ...

> We can make the reply to a commit message when any of the following
> events have occurred
> 
> 1. We sent the message to standby
> 2. We received the message on standby
> 3. We wrote the WAL to the WAL file
> 4. We fsync'd the WAL file
> 5. We CRC checked the WAL commit record
> 6. We applied the WAL commit record

In DRBD tradition, I suggest you implement all of them, or at least 
factor the code so that each of them can be a one line change.  (We can 
probably later drop one or two options.)