Re: [HACKERS] ObjectWeb/Clustered JDBC
Peter Eisentraut wrote: Hans-Jürgen Schönig writes: Especially the disaster recovery mechanism and things such as adding new masters need some more work. Yes, someone is working on automatic recovery (which would extend to adding new masters by starting recovery from zero). In fact, they're just across town from you (together.at). Guess who has taught them PostgreSQL ;). Hans -- Cybertec Geschwinde u Schoenig Ludo-Hartmannplatz 1/14, A-1160 Vienna, Austria Tel: +43/2952/30706 or +43/660/816 40 77 www.cybertec.at, www.postgresql.at, kernel.cybertec.at ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [HACKERS] ObjectWeb/Clustered JDBC
Dave, I know that the backend does - it is an essential feature. Clustered JDBC parses the statement sent to it in order to find out what to do with it. I have played around a little (mostly interactive shell). You will find out that Clustered JDBC will complain in this case because it doesn't know what to do with it. If you are a tool support load balancing and this kind of stuff DECLARE CURSOR can be painful to implement - especially across multiple transactions. Is is a very weak point of the current beta version. Regards, Hans Dave Cramer wrote: Hans, I don't understand the statement about missing DECLARE CURSOR ? The backend supports it? Dave On Sun, 2003-11-23 at 12:12, Hans-Jürgen Schönig wrote: Peter Eisentraut wrote: I was at the ObjectWeb Conference today; ObjectWeb (http://www.objectweb.org) being a consortium that has amassed quite an impressive array of open-source, Java-based middleware under their umbrella, including for instance our old friend Enhydra. And they regularly kept mentioning PostgreSQL in their presentations. To those that are interested in distributed transactions/two-phase commit, I recommend taking a look at Clustered JDBC (http://c-jdbc.objectweb.org/). While this is not exactly the same thing, it looks to be a pretty neat solution for a similar class of applications. In particular, it provides redundancy, load balancing, caching, and even database independence. It is indeed a nice solution but it is far from ready yet. Especially the disaster recovery mechanism and things such as adding new masters need some more work. What I really miss is DECLARE CURSOR. Maybe it will be in there some day :). However, we have done some real testing with sync replication (4 x pg, 1 x oracle). It performed surprisingly well (the JDBC part, not the Oracle one ;) ). Maybe this will be something really useful within the next few months. Cheers, Hans -- Cybertec Geschwinde u Schoenig Ludo-Hartmannplatz 1/14, A-1160 Vienna, Austria Tel: +43/2952/30706 or +43/660/816 40 77 www.cybertec.at, www.postgresql.at, kernel.cybertec.at ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] ObjectWeb/Clustered JDBC
Hans, I don't understand the statement about missing DECLARE CURSOR ? The backend supports it? Dave On Sun, 2003-11-23 at 12:12, Hans-Jürgen Schönig wrote: Peter Eisentraut wrote: I was at the ObjectWeb Conference today; ObjectWeb (http://www.objectweb.org) being a consortium that has amassed quite an impressive array of open-source, Java-based middleware under their umbrella, including for instance our old friend Enhydra. And they regularly kept mentioning PostgreSQL in their presentations. To those that are interested in distributed transactions/two-phase commit, I recommend taking a look at Clustered JDBC (http://c-jdbc.objectweb.org/). While this is not exactly the same thing, it looks to be a pretty neat solution for a similar class of applications. In particular, it provides redundancy, load balancing, caching, and even database independence. It is indeed a nice solution but it is far from ready yet. Especially the disaster recovery mechanism and things such as adding new masters need some more work. What I really miss is DECLARE CURSOR. Maybe it will be in there some day :). However, we have done some real testing with sync replication (4 x pg, 1 x oracle). It performed surprisingly well (the JDBC part, not the Oracle one ;) ). Maybe this will be something really useful within the next few months. Cheers, Hans ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [HACKERS] ObjectWeb/Clustered JDBC
Hans-Jürgen Schönig writes: Especially the disaster recovery mechanism and things such as adding new masters need some more work. Yes, someone is working on automatic recovery (which would extend to adding new masters by starting recovery from zero). In fact, they're just across town from you (together.at). -- Peter Eisentraut [EMAIL PROTECTED] ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
[HACKERS] ObjectWeb/Clustered JDBC
I was at the ObjectWeb Conference today; ObjectWeb (http://www.objectweb.org) being a consortium that has amassed quite an impressive array of open-source, Java-based middleware under their umbrella, including for instance our old friend Enhydra. And they regularly kept mentioning PostgreSQL in their presentations. To those that are interested in distributed transactions/two-phase commit, I recommend taking a look at Clustered JDBC (http://c-jdbc.objectweb.org/). While this is not exactly the same thing, it looks to be a pretty neat solution for a similar class of applications. In particular, it provides redundancy, load balancing, caching, and even database independence. -- Peter Eisentraut [EMAIL PROTECTED] ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
