-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Alex Vinogradovs wrote: > Hi guys, > > > I've got a bunch of PosgreSQL servers connected to external storage, > where a single server needs to be serving as WO database dealing with > INSERTs only, and bunch of other guys need to obtain a copy of that > data for RO serving, without taking resources on WO server. You can't do that with PostgreSQL without replication. Unless you are willing to have outages with your RO servers to apply the logs. Further you are considering the wrong logs. It is not the WAL logs, but the archive logs that you need. Sincerely, Joshua D. Drake > The idea is to have say 2 raw devices which would be used as 2 WAL > segments (round-robin). RO servers will go after the one that's not used > at a given time with something like xlogdump utility and produce INSERT > statements to be then executed locally. After that import is done, a > command will be issued to the WO server to switch to the other segment > so that the cycle can repeat. > The objective of that replication model is to ensure that SELECT > queries won't ever affect the performance of the WO server, > which may experience uneven loads. > > Is that possible with the 8.2.4 or 8.3 capabilities, or maybe with > minor modifications ? > > Thanks! > > Best regards, > Alex Vinogradovs > > > ---------------------------(end of broadcast)--------------------------- > TIP 4: Have you searched our list archives? > > http://archives.postgresql.org/ > - -- === The PostgreSQL Company: Command Prompt, Inc. === Sales/Support: +1.503.667.4564 24x7/Emergency: +1.800.492.2240 PostgreSQL solutions since 1997 http://www.commandprompt.com/ UNIQUE NOT NULL Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate PostgreSQL Replication: http://www.commandprompt.com/products/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG2LY7ATb/zqfZUUQRAkM6AJ9AcueKf/f7Aali9cuia12Cp3ea3wCfdN+s C3VIqLGY/pHMdFtXt6Tgx74= =RASk -----END PGP SIGNATURE----- ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
