I've followed the CouchDB project with interest over the last couple of years, and see it is now an Apache Incubator project. Prior to that, the CouchDB web site was full of do not use for production code type disclaimers, so I'd done no more than keep an eye on it. I'd be interested to know your experiences if you've been using CouchDB ...
We're looking at CouchdDB for a CMS-ish application. I know the database is implemented as a set of files in the file system, what I'm looking for are common patterns, best practices and workflow advice surrounding backing up our production database, and, especially, the process of cloning the database for use in development and testing...
As far as I understand, CouchDB indexes are updated when a view is queried. Assuming there are more reads than writes, isn't this bad for scaling? How would I configure CouchDB to update indexes on writes, or better yet, on a schedule? ...
Rails uses the concept of migrations to deal with model changes using the ActiveRecord API. CouchDB uses JSON (nested maps and arrays) to represent its model objects. In working with CouchDB so far, I don't see good ways of recognizing when the document's structure has changed (other than being disciplined as a developer), or for migra...
I am already excited about document databases and especially about CouchDB's simplicity. But I have a hard time understanding if such databases are a viable option for multi user systems. Since those systems require some kind of relations between records which document databases do not provide. Is it completely the wrong tool for such c...
I was looking into the possibility of using CouchDB. I heard that it was similar to Lotus Notes which everyone loves to hate. Is this true? ...
I'm using the following view function to iterate over all items in the database (in order to find a tag), but I think the performance is very poor if the dataset is large. Any other approach? def by_tag(tag): return ''' function(doc) { if (doc.tags.length > 0) { for (var tag in doc.tags) { ...
I am working on a project that is going to use CouchDB for flexible storage of documents. The requirements of my system are a neat match for CouchDB for storage. BUT My question really boils down to this: Should I keeop using ActiveRecord and MySQL as well ... there are a raft of handy Plugins that are all readily available for use wit...
I am looking for a backend solution for an application written in Ruby on Rails or Merb to handle data with several billions of records. I have a feeling that I suppose to go with a distributed model and at the moment I looked at HBase with Hadoop Couchdb Problems with HBase solution as I see it -- ruby support is not very strong, a...
I mean, can you use couchDB for: CRUD of items, users bids and auctions resolutions bidirectional califications forum items comparison ...
I need to do transactions (begin, commit or rollback), locks (select for update). How can I do it in a document model db? Edit: The case is this: I want to run an auctions site. And I think how to direct purchase as well. In a direct purchase I have to decrement the quantity field in the item record, but only if the quantity is great...
How would I go about implementation the queries required for pagination? Basically, when page 1 is requested, get the first 5 entries. For page 2, get the next 5 and so on. I plan to use this via the couchdb-python module, but that shouldn't make any difference to the implementation. ...
I've been trying to see if I can accomplish some requirements with a document based database, in this case CouchDB. Two generic requirements: CRUD of entities with some fields which have unique index on it ecommerce web app like eBay (better description here). And I'm begining to think that a Document-based database isn't the be...
I am in the early stages of design of an application that has to be highly available and scalable. I want to use an eventual consistency data model for this for a number of reasons. I know and understand why this is an unpopular architectural choice for many solutions, but it's important in my case. I am looking for real-world advice, b...
I'm using couchdbx v. 0.8.1 and datamapper 0.9.8. I've written a few simple views, copied some from other examples. If I query the views with a browser they return id's. If I query them using datamapper in ruby I get no id's. I've googled for days, been on IRC and looked through the couch and datamapper google groups. I've tried downgrad...
Why should I use document based database like CouchDB instead of using relational database. Are there any typical kinds of applications or domains where the document based database is more suitable than the relational database? ...
I've got ~15k rows in MSSQL 2005 that I want to migrate into CouchDB, where 1 row = 1 document. I have a CLR-UDF that writes n rows to an schema-bound XML file. I have an XSL transform that converts the schema-bound XML to JSON. With these existing tools I'm thinking I can go MSSQL to XML to JSON. If I batch n rows per JSON file, I...
I'm building an application with multiple server involved. (4 servers where each one has a database and a webserver. 1 master database and 3 slaves + one load balancer) There is several approach to enable caching. Right now it's fairly simple and not efficient at all. All the caching is done on an NFS partition share between all servers...
I'm primarily a front-end coder but I'm not a stranger to server-side programming or the command line. Regardless I've still got a lot to learn about setting up servers and whatnot so I was wondering if anyone could help me put together some steps for setting up CouchDB on (preferably) ubuntu. That's my main goal but I'd also like to ge...
I'm considering using CouchDB for an upcoming site, but I'm a little confused as far as far as how to implement a system of user ratings for the site. Basically, each item of content can be rated by a given user. What way of doing this makes the most sense in the CouchDB model? I would think the DRYest and most logical way would be to ha...