Something I wonder about :
does osmosis/xapi import the planet dump as-is, or does it do some
pre-processing to get rid of the history ?
If osmosis is lossless, would it make sense to make a lossy version that
gets rid of older versions ?
regards,
Sami Dalouche
On 11-02-18 02:29 PM, Graham Jones wrote:
Are the hardware requirements really so modest?
A few weeks ago I tried experimenting by importing just Europe and it
took a week (on my machine which has 2GB memory), so I gave up on the
idea of having my own whole planet database.
Then I had major trouble with the database size growing, and never
really got the 'trimming extra nodes outside of the bounding box'
trick working - that seemed to take so long that I gave up on it.
Maybe you need to do that after each import, rather than prune it
once a week....
If people are managing to maintain their own database on modest
hardware, I would be interested to know what hardware and software
configuration they use, because I am thinking of investing in a
virtual server to do it, but want to go for minumum specification to
save on the cost.
Graham.
On 18 February 2011 18:27, 80n <[email protected]
<mailto:[email protected]>> wrote:
On Fri, Feb 18, 2011 at 5:47 PM, MP <[email protected]
<mailto:[email protected]>> wrote:
More XAPI servers running on good hardware is the only
realistic solution.
Well, there could perhaps be another solution, like running
your own XAPI server - the minutely diffs are usually less
than 100Kb, so the required bandwidth to download from
planet.openstreetmap.org <http://planet.openstreetmap.org>
would be less than 2 Kb/second in average.
But the question is - how large would be the planet database
on disk (how large would it get once you import the planet dump)
I guess the database would be in order of tens of gigabytes,
probably over 100 GB ...
About 350GB
And how much memory you need on the machine to run some
reasonable queries (if 4 GiB works for main XAPI server, would
it be usable on machine with only 1 GiB of memory?)
Yes
Martin
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--
Graham Jones
Hartlepool, UK.
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