4 ms·

I've looked into using this before and couldn't work out why I'd want to use it over alternatives, or how it stored data. I think the new website is fantastic,

by rmccue 15y ago

I've looked into using this before and couldn't work out why I'd want to use it over alternatives, or how it stored data. I think the new website is fantastic, as I now know all of this and more just from a quick glace. Great work.

rogerbinns 15y ago
The one thing CouchDB does really well is multi-master replication. Any server can be in any state and replicate with any others. It works somewhat analogously to a flood fill. Contrast with other databases where you have to nominate master servers and communicate with them. I gave up on CouchDB two years ago. Partly it was a poor experience with the community, but mostly technical issues. Writing is done to append only journals. This means not only the added/changed data is written but also all changed btree nodes. I was starting with around 2GB of JSON data (10 million documents). With CouchDB it would turn into 43GB on disk (including views/indices). With tuning, tweaks and compaction I was able to get it to half of that, but it was still a massive explosion of data size. I tried MongoDB with the same data and ended up with just over 4GB consumed on disk. In addition my data load time was 6 minutes compared to 75 minutes for CouchDB. I was even experiencing unindexed queries in MongoDB being faster than indexed ones in CouchDB! I'm sure CouchDB has improved a bit since then, but I don't think the implementation can do much better especially at the data sizes I was doing. (Personally I think that is a rather small amount of data, one of the CouchDB developers called a million documents large!)
lvillani 15y ago
> I think the new website is fantastic, as I now know all of this and more just from a quick glace. Great work. I noticed that it is almost identical to Apache Cordova's [1]. Is there an ongoing effort to bring a consistent look to all Apache projects websites? [1]: https://incubator.apache.org/cordova/ https://incubator.apache.org/cordova/
- Kiall 15y ago
  I noticed in the HTML source that they credit Cordova: > Thanks to Yohei Shimomae and the Apache Cordova team for the original design....
- nslater 15y ago
  I wouldn't say this is part of an intentional standardisation effort, but we worked closely with the Cordova team on this. If other projects want to co-ordinate with us, I would welcome that.

by rmccue 15y ago

rogerbinns 15y ago

The one thing CouchDB does really well is multi-master replication. Any server can be in any state and replicate with any others. It works somewhat analogously to a flood fill. Contrast with other databases where you have to nominate master servers and communicate with them. I gave up on CouchDB two years ago. Partly it was a poor experience with the community, but mostly technical issues. Writing is done to append only journals. This means not only the added/changed data is written but also all changed btree nodes. I was starting with around 2GB of JSON data (10 million documents). With CouchDB it would turn into 43GB on disk (including views/indices). With tuning, tweaks and compaction I was able to get it to half of that, but it was still a massive explosion of data size. I tried MongoDB with the same data and ended up with just over 4GB consumed on disk. In addition my data load time was 6 minutes compared to 75 minutes for CouchDB. I was even experiencing unindexed queries in MongoDB being faster than indexed ones in CouchDB! I'm sure CouchDB has improved a bit since then, but I don't think the implementation can do much better especially at the data sizes I was doing. (Personally I think that is a rather small amount of data, one of the CouchDB developers called a million documents large!)

lvillani 15y ago

> I think the new website is fantastic, as I now know all of this and more just from a quick glace. Great work. I noticed that it is almost identical to Apache Cordova's [1]. Is there an ongoing effort to bring a consistent look to all Apache projects websites? [1]: https://incubator.apache.org/cordova/ https://incubator.apache.org/cordova/

Kiall 15y ago
I noticed in the HTML source that they credit Cordova: > Thanks to Yohei Shimomae and the Apache Cordova team for the original design....
nslater 15y ago
I wouldn't say this is part of an intentional standardisation effort, but we worked closely with the Cordova team on this. If other projects want to co-ordinate with us, I would welcome that.