[OSM-talk] Why isn't any XAPI server available ?
Sami Dalouche
skoobi at free.fr
Fri Feb 18 20:22:00 GMT 2011
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 <80n80n at gmail.com
> <mailto:80n80n at gmail.com>> wrote:
>
> On Fri, Feb 18, 2011 at 5:47 PM, MP <singularita at gmail.com
> <mailto:singularita at gmail.com>> 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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