After posting about Scott Motte’s comparison of MongoDB and CouchDB, I thought there should be some more informative sources out there, so I’ve started to dig. The first I came upon (thanks to Debasish Ghosh @debasishg) is an article about ☞ Raindrop requirements and the issues faced while attacking them with CouchDB and the pros and cons of possibly replacing CouchDB with MongoDB: [Pros] Uses upd
I'm trying to use CouchDB with HTML/standalone REST architecture. That is, no other app server other than CouchDB and ajax style javascript calling CouchDB. It looks like cross scripting is a problem. I was using Cloudkit/Tokyo Cabinet before and it seems like the needed callback function was screwing it up in the URL. Now I'm trying CouchDB and getting the same problem. Here are my questions: 1)
When Canonical released Ubuntu 9.10 in October, the Linux distributor also officially launched Ubuntu One, a cloud storage solution that is designed to synchronize files and application data between multiple computers over the Internet. The service has considerable potential, but only a handful of applications—including Evolution and Tomboy—take advantage of its capabilities. Fortunately, the unde
This is a tale of three images. I found these images while investigating the internals of several different applications. There are some really neat software projects emerging at the moment, and as a developer I always find it interesting to take a look at the implementation details, because there is often a lot to be learned. It’s not always something you might need right now, but maybe a few yea
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CouchDB needs to have it’s databases compacted regularly. It’s quite easy to do but the ease of doing so may lead you into thinking that it’s not worthy of serious consideration. You need to be aware of a few things. Here at the beeb we have many databases of very differing sizes, with very different “busy times” and to be honest we don’t really know nor care what data is in them. Some documents a
先日のYuval Kogman氏のエッセイ″Why I don't use CouchDB″の私家版和訳(私は略して私訳と呼んでいます)が私の周辺のCouchDBファンに冷や水を浴びせたようです。どうも誤解もあるようで、Yuval Kogman氏は頭からCouchDBを否定しているのではないのです。氏のような一流のPerler(いや、Perlerでなくても)は野心的である反面、非常に現実的です。ですから、現時点においてはCouchDBがかなりスピード面で劣るのであるから、それを補って余りある野心的な(現にロードマップに載せていますよね)フィーチャーを早く見せなさいと、氏は言っているのです。これは叱咤激励でもあると思います。 私はたまたまMongoDBを選びましたが、夢を持ちたい人はCouchDBを選べばいいし、もっと現実路線の人は他のNoSQLデータベースを選べばいいのです。 そんなことよ
When we announced raindrop, we had a CouchDB based data-model in place but no API for accessing the data – the front-end Javascript application was forced to issue CouchDB API requests (ie, query views and fetch documents by ID) directly. This presented us with a few problems: The front-end code had to perform a fair bit of ‘data munging’ – for example, given CouchDB has no concept of a ‘join’, m
23rd November 2009 I gave a talk on Friday at Full Frontal, a new one day JavaScript conference in my home town of Brighton. I ended up throwing away my intended topic (JSONP, APIs and cross-domain security) three days before the event in favour of a technology which first crossed my radar less than two weeks ago. That technology is Ryan Dahl’s Node. It’s the most exciting new project I’ve come ac
Over the last couple years, we see an emerging data storage mechanism for storing large scale of data. These storage solution differs quite significantly with the RDBMS model and is also known as the NOSQL. Some of the key players include ... GoogleBigTable, HBase, Hypertable AmazonDynamo, Voldemort, Cassendra, Riak Redis CouchDB, MongoDB These solutions has a number of characteristics in common K
I have been playing with CouchDB for the last couple of days a lot. And I like what I see even more. Couch seems to be extracted from the web so much, that it reminds me of my joy when discovering Rails couple of years ago. One of those impossibly great things is that CouchDB is completely „raw HTTP“-based. So, for instance, clustering is one of those things achieved so trivially it almost hurts –
私は家ではMongoDBを使用しています。では、何故RDBMS(種類は何でもいいですが)でないかと言いますと、家の外へ一歩でも出れば、やれORMがどうのこうの、スキーマがどうのこうの、SQLがどうのこうの、と日夜囲まれているのに、そんなもん家に入れたくないでしょう? MongoDBはインタラクティブシェルとしてjavascriptシェルを持っているので、JSONでデータを格納出来ますし、今ややっとPerlドライバであるMnogoDB(元々は、ご存知Florian Ragwitz氏が手掛けられ、今のメンテナはKristina Chodorow女史です)が安定して来ましたので、Devel::REPLを使用すれば、Perlのハッシュのままインタラクティブに格納出来ます。私の個人的な記録はすべてMongoDBに放り込んでいます。卓上メモ代わりのようなもんです。 これを言うと必ず「じゃ、CouchD
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