On 14.05.09 11:59, Chris Bainbridge wrote: > 2009/5/14 Dganit David <dgani...@puresight.com>: > >> We are planning a web application that saves the data of up to 1,000,000 >> users. >> >> I would like to know the limitation of zodb. >> >> Currently we are using ClientStorage with zeo, >> > In my experience building a large scale application, ZEO did not scale > with my application in the way that I had hoped. It worked great with > a few hosts accessing the ZEO server in parallel, but when scaled up > the ZEO server itself quickly became a bottleneck which had to be > designed around. The thing that surprised me was that the server > itself became the bottleneck with only 4 hosts active - it obviously > depends on the access patterns of your application. A single ZEO > server may not serve the needs of 1 million users if you have a large > number accessing the application concurrently, so I suggest that you > think about multiple servers, replication, and dividing the data > itself up to enabling parallel distributed access before starting to > code the application. And ensure that you have a test suite that will > simulate the large scale requirements from the beginning. > A large scale-application like this always requires careful planning - independent of using the ZODB or a RDBMS. Assuming that this is a big project, there should be a budget for architecture :-)
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