Thanks, I wasn't aware of the no IP connections required replication. I wonder whether this works on a BigCouch cluster?
Martin On 1 November 2010 17:46, Benjamin Young <[email protected]> wrote: > Martin, > > I'm not sure what your setup is, but if you had an "app" database (the > authoritative db for the _design doc you want to share with customers) on > the same instance of CouchDB with the customer's db's, then your > replication > requests would all be local--no IP connections what so ever. > > To do that in a multi-instance scenario, you could simply have the app db's > continuously replicate between the instances, and locally replication to > the > customer db's on each particular instance. Or, if you don't want to use > replication between your instances, you could push your changes into the > "app" db's on each of the instances. In either case, you'd only be > generating HTTP traffic on the pushing of the app and/or replication of the > "app" db's between the machines--so, very low network overhead in either > case. > > Later, > Benjamin > > On Mon, Nov 1, 2010 at 11:10 AM, Martin Higham <[email protected] > >wrote: > > > 'Continuous' replication to thousands of databases means thousands of > > permanent IP connections. The alternative is that you write a script that > > fires off replication requests in sequence for all your databases to > > perform > > the update. As you say, this shouldn't occur often. > > > > Martin > > > > On 1 November 2010 14:48, Benjamin Young <[email protected]> wrote: > > > > > Martin, > > > > > > Why not? It's only going to be sending changes. Unless you're > constantly > > > updating your app installation or those changes are massive, you > > shouldn't > > > run into any trouble. > > > > > > Your other option is the "middle-ware" setup, but then you'd loose the > > > power > > > of application replication. > > > > > > Thoughts? > > > > > > Later, > > > Benjamin > > > > > > On Mon, Nov 1, 2010 at 10:30 AM, Martin Higham <[email protected] > > > >wrote: > > > > > > > Until you have one DB per user and then you're looking at replicating > > the > > > > design doc to many thousands of databases and continuous replication > > > > doesn't > > > > make sense > > > > > > > > Martin > > > > > > > > On 1 November 2010 14:11, Benjamin Young <[email protected]> > > wrote: > > > > > > > > > Hey Gregor, > > > > > > > > > > If you setup continuous replication between your various customer > > db's > > > > and > > > > > your primary application database (which would likely only contain > > the > > > > main > > > > > app's design doc), then publication of the app would automatically > be > > > > > "rolled out" to the various customer db's. Because these DB's would > > be > > > > > "standalone" versions of the app, they could even be on multiple > > hosts > > > > > running CouchDB, so you'd remove the single point of failure > problem > > > that > > > > > most web-apps have--as they run (often) through a single server for > > all > > > > > customers. > > > > > > > > > > Personally, that mode of "multi-tenant" app (via replication) is > > pretty > > > > > exciting, and opens up new ways of dealing with load and > application > > > > > distribution. Get's the mind reeling, or maybe that's the coffee I > > just > > > > > finished... :) > > > > > > > > > > Later, Gregor, > > > > > Benjamin > > > > > > > > > > On Mon, Nov 1, 2010 at 6:49 AM, Jan Lehnardt <[email protected]> > wrote: > > > > > > > > > > > Hi Gregor, > > > > > > > > > > > > On 1 Nov 2010, at 08:12, Gregor Frey wrote: > > > > > > > > > > > > > Hi, > > > > > > > when I followed the discussion about the setup of CouchDB in a > > > hosted > > > > > > environment, I wondered whether it would be possible to share the > > > > > > application level software between multiple databases. This would > > > > enable > > > > > a > > > > > > real multi-tenant set-up. Otherwise you must duplicate the > > > application > > > > > with > > > > > > each new tenant. > > > > > > > Does anybody know whether and how CouchDB supports application > > > > sharing? > > > > > > > > > > > > CouchDB does not support application or document sharing over > > > > databases. > > > > > > But nothing stops you from gradually replicating a new design doc > > > (the > > > > > > application) to every database. > > > > > > > > > > > > Cheers > > > > > > Jan > > > > > > -- > > > > > > > > > > > > > > > > > > > > > > > > > > >
