-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 David Pratt wrote: > Andreas Jung wrote: > >> >> repozo does not help you syncing multiple ZEO server..it just performs >> an incremental backup of an existing Data.fs file. And I don't know of >> any solution have multiple "master" ZEO servers. There can be only one. >> >> -aj > > > For sure. I guess the best one could have would be replicated storage > clients that when offline could operate on their own data. When they go > online they would first attempt resolve their data with the (master) > server (synchronizing), and then append each new transaction to the > local replica as it was occuring (replicating) so that before you went > offline again, your storage is up to date. > > I think this is all possible with a sync server, each client having an > independent asynchronous loop for synchronizing, and a synchronization > protocol for two way syncing. Zope has most of this now but it was never > designed to provide data to the local storage to keep it up to date > (while the zeo client is being used). This would be quite handy and I > think there are some possibilities to do this. > > I guess in a general way, this is what the spread is doing for ZRS but > the mechanism and use case is different. I don't think you'd want any > client to be offline for long with this service with a replicated > storage client. I think the idea is more of a hot backup in case of > failure of the main storage but I know little of ZRS.
ZRS secondaries go into "recovery mode" whenever they lose connection with the promary: that recovery is sufficient to allow it to resync (even to bring up a new, "empty" secondary). Tres. - -- =================================================================== Tres Seaver +1 202-558-7113 [EMAIL PROTECTED] Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFEV7xH+gerLs4ltQ4RAnP3AJ9PGvYV1l4fqA9Sx1bnobr/ri4FYACdE1V9 ym8LhU8go+za7q15k7y5NSs= =tTh+ -----END PGP SIGNATURE----- _______________________________________________ Zope maillist - [email protected] http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
