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# What is ArangoDB?
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# What is 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.
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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 and vertically with a few mouse clicks.
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-ArangoDB runs everywhere: On-prem, in the cloud and also on [ArangoDBs Cloud Service Oasis](https://cloud.arangodb.com/home).
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+ArangoDB runs everywhere: On-prem, in the cloud and also on [ArangoDB's Cloud Service Oasis](https://cloud.arangodb.com/home).
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The supported data models can be mixed in queries and allow ArangoDB to be the aggregation point for your data.
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The supported data models can be mixed in queries and allow ArangoDB to be the aggregation point for your data.
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@@ -151,7 +151,7 @@ See more information about [Configuration](https://www.arangodb.com/docs/stable/
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## Persistent Data
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## Persistent Data
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-ArangoDB supports two different storage engines as of ArangoDB 3.2. You can choose them while instantiating the container with the environment variable `ARANGO_STORAGE_ENGINE`. With `mmfiles` you choose the classic storage engine, `rocksdb` will choose the newly introduced storage engine based on [RocksDB](http://rocksdb.org/). The default choice is `mmfiles`.
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+ArangoDB supports two different storage engines from version 3.2 to 3.6. You can choose them while instantiating the container with the environment variable `ARANGO_STORAGE_ENGINE`. With `mmfiles` you choose the classic storage engine (not available in 3.7 and later), `rocksdb` will choose the storage engine based on [RocksDB](http://rocksdb.org/). The default choice is `rocksdb` from version 3.4 on.
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ArangoDB use the volume `/var/lib/arangodb3` as database directory to store the collection data and the volume `/var/lib/arangodb3-apps` as apps directory to store any extensions. These directories are marked as docker volumes.
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ArangoDB use the volume `/var/lib/arangodb3` as database directory to store the collection data and the volume `/var/lib/arangodb3-apps` as apps directory to store any extensions. These directories are marked as docker volumes.
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Simran