[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Maposmatic-dev] Growth of on-disk size of OSM database
From: |
Thomas Petazzoni |
Subject: |
[Maposmatic-dev] Growth of on-disk size of OSM database |
Date: |
Wed, 14 Jul 2010 12:20:19 +0200 |
Hi Matt, Hi Frederik,
Following your respective talks at SOTM, we (MapOSMatic) have a question
regarding the growth of the on-disk size of the OSM world database.
We've done an initial import of this database in ~october 2009, and
since then, we've used daily diffs to keep this database up to date. As
of today, our PostgreSQL database takes 174 GB. However, during a
discussion at SOTM, Frederik told us that the size of the world
database resulting from a brand-new import would only be 120-130 GB.
This seems to mean that using the daily diffs does not produce the same
result as making a full import of the database. Is this true ?
Matt, during our talk, you answered a question from the audience asking
whether using minutely diffs over a long period of time would not be a
problem compared to doing regular full imports of the database. Is
there a major difference in how minutely diffs and daily diffs are
handled that would explain why using daily diffs over a long period of
time does not work and why it would work with minutely diffs ?
Thanks for your insights,
Thomas, for the MapOSMatic team
--
Thomas Petazzoni http://thomas.enix.org
MapOSMatic http://www.maposmatic.org
signature.asc
Description: PGP signature
- [Maposmatic-dev] Growth of on-disk size of OSM database,
Thomas Petazzoni <=