The topic I will cover is the security in MongoDB. A very concurrent topic as all of you already know. I am going to try to explain that MongoDB offers us all the necessary tools to make our data safe and without any kind of risk.
Do you know the new MongoDB tool which lets you analyze your data, the structure of your collections in a visual manner without having to write down commands? Its name is Compass and it is available for you now! DATA SET I am going to describe how to use it […]
In Two steps to shard a MongoDB collection and What is a MongoDB chunk? posts we explained how to shard a collection, what a chunk is, which of them are moved when our system is not balanced and what shard will be its destination. Today, we are going to use […]
We have already studied the chunk concept What is a MongoDB chunk? and also how MongoDB splits it when grows beyond the maximum size established by default Four steps to split a MongoDB chunk. At this post we are going to study the steps that MongoDB follows to balance our […]
MongoDB User Group Madrid (meetup.com) Date: October, 13th 2015 19:00h. Place: Telefónica Flagship Store building. Gran Vía street, 28 28013 Madrid Room: Auditorium. First floor Event: MongoDB User Group Madrid (meetup.com) Talk 1: Tag-based sharding Speaker: Juan Roy @juanroycouto Talk 2: […]
Good night! Here you have the slides I prepared for my talk about MongoDB tag-based sharding. Anyway, this is the link to view them at slideshare: Tag-based sharding Juan Roy presentation Soon I will write about my thoughts of the event. Cheers!
Hi guys! Tomorrow, at 19:00pm, I will be talking about MongoDB sharding at Telefonica Flagship Store (map). Thank you very much to Norberto @nleite, and to the whole meetup organization, for having thought about me to this occasion. I am going to talk, and show, about the possibilities that MongoDB offers us to get a […]
A new MongoDB meeting will be in Madrid on October 13th. In this occasion I will have the opportunity to talk about Tag-based sharding. This will be complemented with a talk by Rafael Aranaz @rafaranaz about GridFS. I believe the afternoon will be very interesting, users with less expertise and […]
This is the forth and last post of the serie about the MongoDB Aggregation Framework. We will continue with different queries. By the moment, we are going to use our five documents set inserted in our ‘aggfwktest’ collection. Average computation in a new field
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> db.aggfwktest.aggregate([ ... { $group : { _id : "$user_id", mediascore : { $avg : "$score" } } } ... ]) { "_id" : 3, "mediascore" : 7 } { "_id" : 2, "mediascore" : 6 } { "_id" : 1, "mediascore" : 7.5 } > |
The highest and the lowest, […]
