On Tue, Aug 21, 2018 at 1:49 PM Paul Wittle via Geoserver-devel <
[email protected]> wrote:
> Hi folks,
>
>
>
> I thought I’d ask this on the development group instead of the user one as
> this is a bit more technical in its nature; please accept my apologies if
> the question is rather a complete waste of time.
>
>
>
> I have been reviewing the way we cluster our GeoServers and bouncing
> around trying to get my head around the ins and outs of the GWC or MapProxy
> etc. The documentation seems to hint that I should use a standalone GWC if
> I’m clustering but Andrea has pointed out that most people use the embedded
> GWC (I’m not sure if that is or is not within a cluster).
>
Yes, often in a cluster. That works reasonably well on Linux, but not so on
Windows due to damn file locking.
Variants I've seen:
- Fully seeded layers prepared offline (on a out-of-cluster server) for
long lived cached, that are getting shared via network (no writing happens)
- Each server having its small, local, isolated, non network shared, for
caches that are short lived
- S3 storage of tiles (that solves the main issue of tile cache sharing
on Linux NFS, which is poor performance on a network share). With the
latest releases (yes, 2.14) there has been work to support Minio too (a
open source S3 lookalike) but not sure what would happen with writes, if
they are supported or not, still haven't tried it.
I would also say we are not really a high end deployment but we are stuck
> with Windows and so we have been having issues that have led us to setup a
> cluster. I can’t comment on whether or not that is sensible but just for
> background if you are wondering why I’m even looking at this.
>
That's not the best place to be, most of the Windows deployment I've seen
eventually switched to Linux to get better performance and increased
stability.
The Minio alternative looks interesting, I'd give it a look, if it works it
may just solve the core of the problem (if not, it might be that it can be
fixed with relatively little effort)
Cheers
Andrea
==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information. == Ing. Andrea Aime @geowolf Technical Lead
GeoSolutions S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) phone: +39
0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549
http://www.geo-solutions.it http://twitter.com/geosolutions_it
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