Thanks again guys, What you say makes sense Frederik, so the question I have to ask myself is how many threads I should have. As I have 8 virtual processors I guess that means 8 threads.
Jason On Wed, Mar 30, 2011 at 12:42 PM, Frederik Ramm <frede...@remote.org> wrote: > Hi, > > > On 03/30/2011 01:21 PM, Jason Lee wrote: > >> Regarding multiple instances, I am just thinking in terms of performance >> and stability. If I had 2 instances of renderd and one error's for >> whatever reason, then at least it is not affecting the other service. >> > > Having two renderd processes serving the same maps is asking for trouble > (depending on how you balance the load, the same tile might end up being > rendered twice and suchlike). > > Having two renderd processes serving different maps should be possible. You > will have to set up different Apache vhosts, each configuring mod_tile to > use a different Unix domain socket for talking to renderd, and you will have > to start multiple instances of renderd, one for each socket. If you don't > modify the source code, each renderd will use the same pidfile which means > you will have to use non-standard means to shut them down. Also, this method > would mean that each renderd has a queue of its own which may lead to a less > even distribution of performance, and issues with queue length and so on if > several of your maps are used heavily. > > In short, I wouldn't recommend it. > > Bye > Frederik > > > _______________________________________________ > dev mailing list > dev@openstreetmap.org > http://lists.openstreetmap.org/listinfo/dev >
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