On 17/09/10 12:22, Fujii Masao wrote:
On Fri, Sep 17, 2010 at 5:09 PM, Heikki Linnakangas
<heikki.linnakan...@enterprisedb.com> wrote:
That said, there's a few small things that can be progressed regardless of
the details of synchronous replication. There's the changes to trigger
failover with a signal, and it seems that we'll need some libpq changes to
allow acknowledgments to be sent back to the master regardless of the rest
of the design. We can discuss those in separate threads in parallel.
Agreed. The attached patch introduces new function which is used
to send ACK back from walreceiver. The function sends a message
to XLOG stream by calling PQputCopyData. Also I allowed PQputCopyData
to be called even during COPY OUT.
Oh, that's simple.
It doesn't feel right to always accept PQputCopyData in COPY OUT mode,
though. IMHO there should be a new COPY IN+OUT mode.
It should be pretty safe to add a CopyInOutResponse message to the
protocol without a protocol version bump. Thoughts on that?
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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