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Something I wonder about :<br>
<br>
does osmosis/xapi import the planet dump as-is, or does it do some
pre-processing to get rid of the history ?<br>
If osmosis is lossless, would it make sense to make a lossy version
that gets rid of older versions ?<br>
<br>
regards,<br>
Sami Dalouche<br>
<br>
<br>
On 11-02-18 02:29 PM, Graham Jones wrote:
<blockquote
cite="mid:AANLkTindor5rof0kWc1Bx7GQbQfyXDG9Av70ipQUMTAA@mail.gmail.com"
type="cite">Are the hardware requirements really so modest?
<div>
<div>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.
<div>
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....</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Graham.<br>
<br>
<div class="gmail_quote">On 18 February 2011 18:27, 80n <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:80n80n@gmail.com">80n80n@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div class="gmail_quote">
<div class="im">On Fri, Feb 18, 2011 at 5:47 PM, MP <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:singularita@gmail.com"
target="_blank">singularita@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt
0pt 0pt 0.8ex; border-left: 1px solid rgb(204,
204, 204); padding-left: 1ex;">
<div>
<blockquote class="gmail_quote" style="margin:
0pt 0pt 0pt 0.8ex; border-left: 1px solid
rgb(204, 204, 204); padding-left: 1ex;">
More XAPI servers running on good hardware is
the only realistic solution.<br>
</blockquote>
<br>
</div>
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 <a
moz-do-not-send="true"
href="http://planet.openstreetmap.org"
target="_blank">planet.openstreetmap.org</a>
would be less than 2 Kb/second in average.<br>
<br>
But the question is - how large would be the
planet database on disk (how large would it get
once you import the planet dump)<br>
<br>
I guess the database would be in order of tens of
gigabytes, probably over 100 GB ...<br>
</blockquote>
</div>
<div><br>
About 350GB<br>
<br>
</div>
<div class="im">
<blockquote class="gmail_quote" style="margin: 0pt
0pt 0pt 0.8ex; border-left: 1px solid rgb(204,
204, 204); padding-left: 1ex;">
<br>
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?)<br>
</blockquote>
</div>
<div><br>
Yes<br>
</div>
<div class="im">
<blockquote class="gmail_quote" style="margin: 0pt
0pt 0pt 0.8ex; border-left: 1px solid rgb(204,
204, 204); padding-left: 1ex;">
<br>
Martin
<div>
<div><br>
<br>
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</blockquote>
</div>
</div>
<br>
<br>
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</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
Graham Jones
<div>Hartlepool, UK.</div>
<br>
</div>
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