Re: BUG #7534: walreceiver takes long time to detect n/w breakdown

On 15.10.2012 13:13, Heikki Linnakangas wrote:
> On 13.10.2012 19:35, Fujii Masao wrote:
>> ISTM you need to update the protocol.sgml because you added
>> the field 'replyRequested' to WalSndrMessage and StandbyReplyMessage.
>
> Oh, I didn't remember that we've documented the specific structs that we
> pass around. It's quite bogus anyway to explain the messages the way we
> do currently, as they are actually dependent on the underlying
> architecture's endianess and padding. I think we should refactor the
> protocol to not transmit raw structs, but use pq_sentint and friends to
> construct the messages. This was discussed earlier (see
> http://archives.postgresql.org/message-id/4FE2279C.2070506@enterprisedb.com)
> I think there's consensus that 9.3 would be a good time to do that as we
> changed the XLogRecPtr format anyway.

This is what I came up with. The replication protocol is now
architecture-independent. The WAL format itself is still
architecture-independent, of course, but this is useful if you want to
e.g use pg_receivexlog to back up a server that runs on a different
platform.

I chose the int64 format to transmit timestamps, even when compiled with
--disable-integer-datetimes.

Please review if you have the time..

- Heikki