On Mon, Oct 19, 2015 at 8:47 PM, Masahiko Sawada <sawada.m...@gmail.com> wrote:
> > Hi, > > Attached patch is a rough patch which supports multi sync replication > by another approach I sent before. > > The new GUC parameters are: > * synchronous_standby_num, which specifies the number of standby > servers using sync rep. (default is 0) > * synchronous_replication_method, which specifies replication method; > priority or quorum. (default is priority) > > The behaviour of 'priority' and 'quorum' are same as what we've been > discussing. > But I write overview of these here again here. > > [Priority Method] > The standby server has each different priority, and the active standby > servers having the top N priroity are become sync standby server. > If synchronous_standby_names = '*', the all active standby server > would be sync standby server. > If you want to set up standby like 9.5 or before, you can set > synchronous_standby_num = 1. > > I used the following setting with 2 servers A and D connected: synchronous_standby_names = 'A,B,C,D' synchronous_standby_num = 2 synchronous_replication_method = 'priority' Though s_r_m = 'quorum' worked fine, changing it to 'priority' caused segmentation fault. Regards, Beena Emerson Have a Great Day!
