Thread: Regarding WAL
Hi , I want to do replication using WAL , please tell the methods by which log shipping is done ie moving the wal files to slaves and executing it. ********** DISCLAIMER ********** Information contained and transmitted by this E-MAIL is proprietary to Sify Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail & notify us immediately at admin@sifycorp.com Complete Coverage of the ICC World Cup '07! Log on to www.sify.com/khel for latest updates, expert columns, schedule, desktop scorecard, photo galleries and more! Watch the hottest videos from Bollywood, Fashion, News and more only on www.sifymax.com For the Expert view of the ICC World Cup log on to www.sify.com/khel. Read exclusive interviews with Sachin, Ganguly, Yuvraj, Sreesanth, Expert Columns by Gavaskar, Web chat with Dhoni and more! .
On 4/24/07, Mageshwaran <j_mageshwaran@sifycorp.com> wrote: > I want to do replication using WAL , please tell the methods by which > log shipping is done ie moving the wal files to slaves and executing it. Not possible at the moment: the log shipping facility that was introduced in 8.2 only lets you set up a so-called warm standby, which cannot be queried; it's not live replication. The warm standby system is a fairly crude hack that relies on WAL files being copied from the main server to the standby and then starting the standby in recovery mode when you want to bring it up. At this point the standby is your main database, and it can no longer WAL files. Documented here: http://www.postgresql.org/docs/8.2/static/warm-standby.html Alexander.
On Tue, 2007-04-24 at 09:02 +0530, Mageshwaran wrote: > Hi , > > I want to do replication using WAL , please tell the methods by which > log shipping is done ie moving the wal files to slaves and executing it. http://www.postgresql.org/docs/8.2/interactive/continuous-archiving.html -- Brad Nicholson 416-673-4106 Database Administrator, Afilias Canada Corp.
On Tue, 2007-04-24 at 11:31 +0200, Alexander Staubo wrote: > On 4/24/07, Mageshwaran <j_mageshwaran@sifycorp.com> wrote: > > I want to do replication using WAL , please tell the methods by which > > log shipping is done ie moving the wal files to slaves and executing it. > > Not possible at the moment: the log shipping facility that was > introduced in 8.2 only lets you set up a so-called warm standby, which > cannot be queried; it's not live replication. > > The warm standby system is a fairly crude hack that relies on WAL > files being copied from the main server to the standby and then > starting the standby in recovery mode when you want to bring it up. At > this point the standby is your main database, and it can no longer WAL > files. Documented here: > > http://www.postgresql.org/docs/8.2/static/warm-standby.html The use-case for Warm Standby is for people that want a simple, efficient mechanism for providing High Availability replication. If there are any feature requests, please let me know. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com