The bulk documents API is not transactional in any useful sense.
On 10 June 2011 13:42, Sean Copenhaver <[email protected]> wrote: > It sounds like you are trying to combine things into a single document. What > were your concerns that you would want to put all manufacturers in a single > document or all log entries for example? That is instead of in a view query > result? > > I don't think there would be an issue with having everything as a separate > document. There are ways to pull back related documents in one query that > would resolve concerns of having to do many hits. As an example, you could > create a view to be able to pull back the device, user, and profile in one > query. > > The wiki has some information on managing relationships: > http://wiki.apache.org/couchdb/EntityRelationship > > On the flip side there are ways to perform CRUD operations on multiple > documents at once, including transactional (although with multiple dbs you > can run into inconsistencies as the transaction won't hold up across > replication): > http://wiki.apache.org/couchdb/HTTP_Bulk_Document_API > > > 2011/6/10 Javier Rodríguez Escolar <[email protected]> > >> Hello, I'm a CouchDB newbie trying to migrate an existing application from >> SQL to NoSQL. I have designed different approaches to model the CouchDB >> documents and I have been leafing through a couple of books [1],[2] in >> order >> to figure out the possible problems each approach might cause, but I still >> have some doubts. Basically the data model of my application domain has the >> following scheme: >> >> *Data model overview* >> >> - Mobile manufacturers (in the order of 60). Each manufacturer has >> different models: >> - Mobile models (in the order of 2000 per manufactorer) >> - Errors. Each manufacturer has a set of types of errors (in the order of >> 1000 per manufacturer) >> - User >> - Mobile device >> - Profile. Identified by a User and a MobileDevice >> - DebugLog. Each debug log takes just 10 words and one DebugLog per >> second is sent to the server. >> - ErrorLog. Each error log takes just 10 words and they are generated >> once in a while. >> - So, my main doubts are listed below: >> >> >> *Doubt 1 (manufacturers and models)* >> >> - Option 1 >> - One document for all the manufacturers: "Manufacturers". It just >> includes a list of manufacturers, each of them has an identifier. >> - One document per model: "ModelX". Each model includes a reference to >> its manufacturer. >> - Option 2 >> - One document for all the manufacturers: "Manufacturers". It includes >> a list of manufacturers. Each manufacturer points to a list of models. >> - One document per manufacturer: "ListOfModels". It includes all the >> models for a given manufacturer. >> >> *Doubt 2 (logs)* >> >> - Option 1 >> - One document per DebugLog: "DebugLogX". >> - Option 2 >> - One document per application life cycle: >> "DebugLogsDuringApplicationLifeCycleX". It includes all the debug logs >> created by the application during its life cycle. An application >> life cycle >> might takes from just a few seconds to some hours. >> >> *Doubt 3 (user, mobile and profile)* >> >> - Option 1 >> - One document per profile: "ProfileX". It includes information about >> the mobile device and the user. >> - Option 2 >> - One document per user: "UserX" >> - One document per device: "DeviceX" >> - One document for all the profiles: "Profiles". It contains a list of >> profiles, each one pointing to its associated user and device. >> >> >> *Doubt 4 (manufacturer errors)* >> >> - Option 1 >> - One document for all the errors. Each error is associated to its >> manufacturer. >> - Option 2 >> - One document per manufacturer: "ManufacturerXErrors". >> >> >> I would appreciate any piece of advice. >> >> Thanks in advance and congrats for your project, >> >> >> [1] >> >> http://www.amazon.com/Beginning-CouchDB-ebook/dp/B003U890N2/ref=sr_1_10?ie=UTF8&qid=1307691243&sr=8-10 >> [2] >> >> http://www.amazon.com/CouchDB-Definitive-Guide-Animal-ebook/dp/B0043D2E9U/ref=sr_1_3?ie=UTF8&qid=1307691243&sr=8-3 >> > > > > -- > “The limits of language are the limits of one's world. “ -Ludwig von > Wittgenstein >
