I have replication factored out in two overlays up and running right now. It's not 100% implemented, and it might get tricky at some point. Most of all, the code is getting awful in terms of #ifdef's, so I'd like to gather some consensus about this direction.
Basically, there are two overlays: "slurprov", which takes care of logging modifications to replog, and "consumer", which takes care of deciding whether a modification is to be accepted or not. "slurprov" is a per-database overlay which allows to specify a replog, a replica-argsfile, a replica-pidfile, a replicationinterval and multiple replica instances. There's little more to say. A global replog is allowed right now. "consumer" is a global overlay. It had to be local to allow mucking with no-user-mod stuff and so. When it's instantiated, it keeps track of what databases are shadow, what updateref they have, and what type of shadow they are. Syncrepl shadows do not accept modifications (unless "multimaster", I kept that code in place although I haven't tested it yet). Slurpd shadows can only be modified by the updatedn. Moreover, multimaster can be switched on via slapd.conf, if enabled at compile time. If stacked right before a global instance of the "chain" overlay, it allows to write to a slave having the updateref chained to the master. Both overlays support back-config in input; "slurprov" also in output, while for "consumer" I have to work out an easy manner to allow a global overlay to append entries below a database. Right now, if the overlays are not compiled, the old code is used, so it should be safe to commit them as they are now. Only, the frontend code that handles replication got quite hairy. There might yet be issues with passwd exop, which I didn't test yet; also, I haven't been able to cast slapo-refint and slapo-ppolicy into this framework, essentially because I couldn't catch their logic at a glance; I don't think it will be too hard to modify them accordingly. I'll play with these overlays a bit more and then commit to HEAD; apologies if something won't work for a while. p. Ing. Pierangelo Masarati Responsabile Open Solution SysNet s.n.c. Via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it ------------------------------------------ Office: +39.02.23998309 Mobile: +39.333.4963172 Email: [EMAIL PROTECTED] ------------------------------------------
