README
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ArangoDB
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ArangoDB is a multi-model, open-source database with flexible data models for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions. Use ACID transactions if you require them. Scale horizontally with a few mouse clicks.
The supported data models can be mixed in queries and allow ArangoDB to be the aggregation point for your data.
To get started, try one of our 10 minutes tutorials in your favorite programming language or try one of our ArangoDB Cookbook recipes.
For the impatient: download and install ArangoDB. Start the server arangod and point your browser to http://127.0.0.1:8529/.
Key Features in ArangoDB
- Multi-Model: Documents, graphs and key-value pairs — model your data as you see fit for your application.
- Joins: Conveniently join what belongs together for flexible ad-hoc querying, less data redundancy.
- Transactions: Easy application development keeping your data consistent and safe. No hassle in your client.
Here is an AQL query that makes use of all those features:
Joins and transactions are key features for flexible, secure data designs, widely used in relational databases but lacking in many NoSQL products. However, there is no need to forego them in ArangoDB. You decide how and when to use joins and strong consistency guarantees, without sacrificing performance and scalability.
Furthermore, ArangoDB offers a JavaScript framework called Foxx that is executed in the database server with direct access to the data. Build your own data-centric microservices with a few lines of code:
Microservice Example
By extending the HTTP API with user code written in JavaScript, ArangoDB can be turned into a strict schema-enforcing persistence engine.
Next step, bundle your Foxx application as a docker container and get it running in the cloud.
Other features of ArangoDB include:
- Schema-free schemata let you combine the space efficiency of MySQL with the performance power of NoSQL
- Use a data-centric microservices approach with ArangoDB Foxx and fuse your application-logic and database together for maximal throughput
- JavaScript for all: no language zoo, you can use one language from your browser to your back-end
- ArangoDB is multi-threaded - exploit the power of all your cores
- Flexible data modeling: model your data as combination of key-value pairs, documents or graphs - perfect for social relations
- Free index choice: use the correct index for your problem, be it a skip list or a fulltext search
- Configurable durability: let the application decide if it needs more durability or more performance
- Powerful query language (AQL) to retrieve and modify data
- Transactions: run queries on multiple documents or collections with optional transactional consistency and isolation
- Replication and Sharding: set up the database in a master-slave configuration or spread bigger datasets across multiple servers
- It is open source (Apache License 2.0)
For more in-depth information read the design goals of ArangoDB
Latest Release - ArangoDB 2.6
The What's new in ArangoDB 2.6 can be found in the documentation.
New collection export HTTP REST API: ArangoDB now provides a dedicated collection export API, which can take snapshots of entire collections more efficiently than the general-purpose cursor API. The export API is useful to transfer the contents of an entire collection to a client application.
Added batch document removal and lookup commands: The commands collection.lookupByKeys(keys) and collection.removeByKeys(keys) have been added for collection objects. These can be used to perform multi-document lookup and removal operations efficiently from the ArangoShell.
Added AQL UPSERT command: This adds an UPSERT statement to AQL that is a combination of both INSERT and UPDATE / REPLACE. The UPSERT will search for a matching document using a user-provided example. If no document matches the example, the insert part of the UPSERT statement will be executed. If there is a match, the update / replace part will be carried out.
We have simplified the return value syntax for data-modification AQL queries, added an alternative implementation for AQL COLLECT that uses a hash table for grouping and does not require its input elements to be sorted.
Other optimizations and speedups in AQL relate to subqueries, return values and queries containing big IN lists for index lookups.
Arangoimp can now optionally update or replace existing documents, provided the import data contains documents with _key attributes.
Foxx Improvements
Added Configuration and Dependencies so that manifests can now define configuration options, as well as dependencies on other Foxx apps. With the Mocha Test framework you can now write tests for your Foxx apps. The API documentation has been updated to Swagger 2.
More Information
Please check the Installation Manual for installation and compilation instructions.
The User Manual has an introductory chapter showing the basic operations of ArangoDB.
Stay in Contact
We really appreciate feature requests and bug reports. Please use our Github issue tracker for reporting them:
https://github.com/arangodb/arangodb/issues
You can use the Google group for improvements, feature requests, comments
Directories
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| Path | Synopsis |
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3rdParty
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etcd/Godeps/_workspace/src/code.google.com/p/gogoprotobuf/proto
Package proto converts data structures to and from the wire format of protocol buffers.
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Package proto converts data structures to and from the wire format of protocol buffers. |
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etcd/Godeps/_workspace/src/github.com/codegangsta/cli
Package cli provides a minimal framework for creating and organizing command line Go applications.
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Package cli provides a minimal framework for creating and organizing command line Go applications. |
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etcd/Godeps/_workspace/src/golang.org/x/net/context
Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes.
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Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes. |
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etcd/discovery
Package discovery provides an implementation of the cluster discovery that is used by etcd.
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Package discovery provides an implementation of the cluster discovery that is used by etcd. |
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etcd/error
error package describes errors in etcd project.
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error package describes errors in etcd project. |
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etcd/etcdserver/etcdserverpb
Package etcdserverpb is a generated protocol buffer package.
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Package etcdserverpb is a generated protocol buffer package. |
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etcd/integration
Package integration implements tests built upon embedded etcd, and focus on etcd correctness.
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Package integration implements tests built upon embedded etcd, and focus on etcd correctness. |
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etcd/pkg/metrics
Package metrics provides metrics view of variables which is exposed through expvar package.
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Package metrics provides metrics view of variables which is exposed through expvar package. |
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etcd/raft
Package raft provides an implementation of the raft consensus algorithm.
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Package raft provides an implementation of the raft consensus algorithm. |
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etcd/raft/raftpb
Package raftpb is a generated protocol buffer package.
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Package raftpb is a generated protocol buffer package. |
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etcd/snap/snappb
Package snappb is a generated protocol buffer package.
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Package snappb is a generated protocol buffer package. |
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etcd/wal
Package wal provides an implementation of a write ahead log that is used by etcd.
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Package wal provides an implementation of a write ahead log that is used by etcd. |
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etcd/wal/walpb
Package walpb is a generated protocol buffer package.
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Package walpb is a generated protocol buffer package. |