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MongoDB 1.8 Released

MongoDB
March 16, 2011
#Releases

We are happy to announce that MongoDB v1.8.0 is now available. 1.8 is the stable follow-up release to 1.6, which came out in August of 2010. Version 1.8 introduces many new features, along with bug fixes and other improvements. Some of the highlights:

A journaling storage engine has been one of the most requested and discussed features within the MongoDB community, and we’re happy to announce that journaling is now available. With journaling enabled, crash recovery is fast and safe.

There were no major changes to sharding, but this release includes many internal improvements, making for a vastly improved experience. As an example, splitting and balancing are considerably faster, with less impact on the overall system.

Downloads: http://www.mongodb.org/downloads
Release Notes: http://www.mongodb.org/display/DOCS/1.8+Release+Notes
Full change log: http://jira.mongodb.org/secure/IssueNavigator.jspa?requestId=10128

We hosted a webinar on 3/17 providing more details on what’s new in MongoDB v1.8. The recording and slides are available on 10gen.com.

Thanks to the MongoDB user community for providing feedback and for testing through the 1.7.x development series.

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MongoDB European conferences next week

There’s just a week to go before our European conferences, when over 400 members of the MongoDB community will gather in London, Paris, and Berlin. The level of interest in and enthusiasm for MongoDB is really exciting. There are just a few places left if you still want to attend either the London and Berlin events. Paris is now sold out but we are taking names for the waiting list. 10gen founder Eliot Horowitz, and several of the key engineers developing the MongoDB project will be presenting sessions aimed at developers and administrators interested in learning how to use the database, with sessions on schema design, indexing, administration, deployment strategies, scaling, and other features. You will also get to hear from several companies about some of the ways in which they are using MongoDB. Here’s just a taste of some of those sessions planned: Graham Tackley of Guardian News and Media will talk about why the Guardian chose MongoDB for guardian.co.uk David Mytton, Founder, Boxed Ice, who use MongoDB to handle billions of database documents, will talk about monitoring MongoDB. Russell Smith, UKD1 Limited, will cover Geo & capped collections with MongoDB - use cases & performance in the real world. Martin Tepper, Travel IQ will explain the architectural problems, and how Travel IQ solved them by using MongoDB as a layer on top of their RDBMS. Lennart Koopmann, XING, will talk about how MongoDB capped collections are perfect for logging. Lennart built his project Graylog2 on top of a capped collection and will talk about his experiences, what you can do with them and what they are good at. Maxime Topolov will talk about how freerice.com, a Drupal site is using MongoDB to serve over 20 Millions page views per day. François de Metz & Ori Pekelman, AF83, will talk about how UCEngine, an Open Source Unified Communication and Collaboration application toolkit, is using MongoDB to store event data in an effecient way. Victor Goya, one of the core developer of UC Engine, will provide an overview of the architecture of UCEngine and a detailed feedback on how it benefits from MongoDB. The conferences are also a great opportunity to meet with and discuss your interest in or usage of MongoDB with the 10gen team and other MongoDB users. We are really looking forward to catching up with you next week, both during the conferences and and at the after parties! :-) MongoUK 2011, 21st March Mongo France 2011, 23rd March Mongo Germany 2011, 25th March Special thanks to Skills Matter in London and AF83 and La Cantine in Paris for their support and partnership for these events. Finally, there are some slots open for lightning talks in London and Berlin. Please contact meghan@10gen.com if you are interested in presenting. We look forward to seeing you next week!

March 15, 2011
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Control Your Colours in MongoDB Charts

Colours are integral to the story you want to convey with any sort of data visualisation. With the latest release of MongoDB Charts , we have added more control to how you can assign colours to your charts! Previously, colour assignment of a series were always based on the series order within that chart. However, we may instead want to colour the chart based on the series value. Some basic scenarios where these different strategies prove useful include: Colouring the top 3 series with the colours gold, silver and bronze. Colouring the series "Summer" and "Winter" with "Red" and "Blue" respectively, to symbolise the season. If the above examples did not give it away enough, we will create some beautiful charts using an Olympics dataset to fully understand the capabilities of the new features. Single-series charts We will start off with a basic single-series chart. These charts usually have a single field encoded to the x and y axes and will display a single colour for the chart. In these charts, we now show a single colour swatch for you to edit. Simple, right? Multi-series charts For more complicated charts with multiple series, we may want to colour the series based on the encoded field itself. These charts are created when multiple fields are encoded to an aggregation channel where the field key is used to build the multi-series chart. In the above chart, I have a medal tally of the top 10 countries based on medal count. The chart itself is fine, but we could improve this chart with some useful colouring! A notable colour scheme we could apply to this chart is assigning each series to the colour of the medal. Inside the Color Palette customisation option, you will see that each encoded field is now listed based on the order that they were encoded in. With the colour scheme set to the medal colour, the chart will be a lot easier to convey the original information. Colours assigned to these channels will always have the same colour assigned and will ignore the ordering of these fields. Assigning chart colours to string data The final chart that we want to create, involves a chart where the data itself is a String type. With these chart types, the Color Palette will provide options to toggle between the two different colour assignment strategies where: 'By Order' will allow you to assign colours by the ordering of the series 'By Series' lets you customise the colour for a specific series value To help streamline the process of assigning colours in the above chart, in the ‘By Order’ menu, I can choose to assign colours based on the value order of the Discipline that appears in the chart. This may be useful if we don't care what the colours are that represent each Discipline. Alternatively, we could assign colours using 'By Series' so that we can be assured that I can represent the Disciplines with an associated colour. Now that we have created all of our charts using the different ways we can assign colours, we can be confident that the colours in our data visualisations are consistent throughout our dashboard. Want to start colouring your charts today? You can start now for free by signing up for MongoDB Atlas , deploying a free tier cluster and activating Charts. Have an idea on how we can make MongoDB Charts better? Feel free to leave an idea at the MongoDB Feedback Engine .

August 4, 2021