John Shilling wrote:
I am looking at having to support tens or even hundres of instances of our
web application in an ASP Model.
We basically do this now using a single Tomcat instance with multiple
webapps (https://host.com/App1/, https//host.com/App2/ etc....) and
don't use virtual servers because we use SSL, and to make that work,
you'd need multiple IP addresses, multiple keystores and multiple SSL
certs. In our model, that's not a requirement.
We're only doing about 50 webapps per Tomcat now, so whether it could do
hundreds, is hard to say. Also, obviously, it depends on the
networking, memory, processor and disk capabilities to support all of
those. I mean, if one webapp is doing millions of transactions per day,
you may find few servers that could handle lots of those together, and
if one is transferring lots of data in and out, it could hog up
bandwidth, etc. And of course one webapps usage will impact the
performance of others, so you'll probably need to balance webapps as you
scale up.
Each of our webapps can run different versions of our base software, but
as mentioned before, they all must run on the same version of Tomcat and
Java -- and in and our case, the same version of the backend PostgreSQL
database which hosts a database per webapp.
It's worked well for us so far.
David
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