Bulk update/upsert in MongoDB?
You can use the command line program mongoimport it should be in your MongoDB bin dir ...
There are two options you'll want to look into to use upsert ...
--upsert insert or update objects that already exist
--upsertFields arg comma-separated fields for the query part of the upsert. You should make sure this is indexed
More info here: http://www.mongodb.org/display/DOCS/Import+Export+Tools
Or just do ...
$ mongoimport --help
mongo can execute .js file.you can push all you update commands in a js file.
t.js
db.record.update({md5:"a35f10a8339ab678612d1f86be08b81a"},{$set:{algres:[]}},false,true);db.record.update({md5:"a35f10a8339ab678612d1f86be08b81b"},{$set:{algres:[]}},false,true);then,mongo 127.0.0.1/test t.js
Bulk updates can also be done in batches as found in the documentation:
I use these to import CSV files that I need to massage a bit before importing the data. Its kinda slow when dealing with updates, but it did my 50K document updates in about 83 seconds, which is far slower than mongoimport command.