From: Markus Schaber <schabi@logix-tt.com>
To: Casey T. Deccio <ctdecci@sandia.gov>
Cc: pgsql-sql@postgresql.org
Subject: Re: Building a database from a flat file
Date: Thu, 03 Mar 2005 16:28:39 +0100
Message-ID: <42272D27.4030900@logix-tt.com> (raw)
In-Reply-To: <1109808921.12430.75.camel@boomerang.ran.sandia.gov>
References: <1109808921.12430.75.camel@boomerang.ran.sandia.gov>
Hi, Casey,
Casey T. Deccio schrieb:
> There is more than one problem with this, but the largest is that I
> would like to perform this whole database rebuild within one
> transaction, so other processes that need to access the database can do
> so without noticing the disturbance. However, performing this set of
> events (besides populating the temporary table) within a single
> transaction takes a long time--over an hour in some cases.
>
> What are some suggestions to help improve performance with replacing one
> set of data in a schema with another?
- Create the new date in another schema, and then simply rename those
two schemas for "switch over"
- Create the new data in differently named tables, and then simply
rename all the old and new tables for "switch over".
- Have two different set of tables (maybe two identical schemas), and
let your application work on a set of views. Then you can change the
views via "create or replace view" for switch over.
Markus
--
Markus Schaber | Dipl. Informatiker | Software Development GIS
Fight against software patents in EU! http://ffii.org/http://nosoftwarepatents.org/
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To: pgsql-sql@postgresql.org
Cc: schabi@logix-tt.com, ctdecci@sandia.gov
Subject: Re: Building a database from a flat file
In-Reply-To: <42272D27.4030900@logix-tt.com>
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