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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2020/05/11 10:32:03 UTC
[GitHub] [incubator-iotdb] liutaohua commented on a change in pull request #1189: Comparison IoTDB with other TSDBs
liutaohua commented on a change in pull request #1189:
URL: https://github.com/apache/incubator-iotdb/pull/1189#discussion_r422934014
##########
File path: docs/UserGuide/9-Comparison/TSDB-Comparison.md
##########
@@ -0,0 +1,400 @@
+<!--
+
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+
+-->
+
+## Known Time Series Database
+
+As the time series data is more and more important,
+several open sourced time series databases are intorduced in the world.
+However, few of them are developed for IoT or IIoT (Industrial IoT) scenario in particular.
+
+
+We choose 3 kinds of TSDBs here.
+
+* InfluxDB - Native Time series database
+
+ InfluxDB is one of the most popular TSDBs.
+
+ Interface: InfluxQL and HTTP API
+
+* OpenTSDB and KairosDB - Time series database based on NoSQL
+
+ These two DBs are similar, while the first is based on HBase and the second is based on Cassandra.
+ Both of them provides RESTful style API.
+
+ Interface: Restful API
+
+* TimeSacleDB - Time series database based on Relational Database
+
+ Interface: SQL
+
+Prometheus and Druid are also famous for time series data management.
+However, Prometheus focuses on how to collect data, how to visualize data and how to alert warnings.
+Druid focuses on how to analyze data with OLAP workload. We omit them here.
+
+
+## Comparison
+We compare the above time series database from two aspects: the feature comparison and the performance
+comparison.
+
+
+### Feature Comparison
+
+I list the basic features comparison of these databases.
+
+Legend:
+- O: big support greatly
+- o: support
+- x: not support
+- :\-( : support but not very good
+- ?: unknown
+
+
+#### Basic Features
+
+| TSDB | IoTDB | InfluxDB | OpenTSDB | KairosDB | TimescaleDB |
+|-----------------------------|-----------------------------|------------|------------|------------|-------------|
+| OpenSource | **o** | o | o | **o** | o |
+| SQL\-like | o | o | x | x | **O** |
+| Schema | "Tree\-based, tag\-based\" | tag\-based | tag\-based | tag\-based | Relational |
+| Writing out\-of\-order data | o | o | o | o | o |
+| Schema\-less | o | o | o | o | o |
+| Batch insertion | o | o | o | o | o |
+| Time range filter | o | o | o | o | o |
+| Order by time | **O** | o | x | x | o |
+| Value filter | o | o | x | x | o |
+| Downsampling | **O** | o | o | o | o |
+| Fill | **O** | o | o | x | o |
+| LIMIT | o | o | o | o | o |
+| SLIMIT | o | o | x | x | ? |
+| Latest value | O | o | o | x | o |
+
+**Details**
+
+* OpenSOurce:
+
+ * IoTDB uses Apache License 2.0 and it is in Apache incubator.
+ * InfluxDB uses MIT license. However, **the cluster version is not open sourced**.
+ * OpenTSDB uses LGPL2.1, which **is not compatible with Apache License**.
+ * KairosDB uses Apache License 2.0.
+ * TimescaleDB uses Timescale License, which is not free for enterprise.
+
+* SQL like:
+
+ * IoTDB and InfluxDB supports SQL like language. Besides, The integration of IoTDB and Calcite is alomost done (a PR has been submitted), which means IoTDB will support Standard SQL.
Review comment:
I think it's better to spell out the future version here than to say what we'll support in the future.
eg:
The integration of IoTDB and Calcite will in 0.10.1
##########
File path: docs/UserGuide/9-Comparison/TSDB-Comparison.md
##########
@@ -0,0 +1,400 @@
+<!--
+
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+
+-->
+
+## Known Time Series Database
+
+As the time series data is more and more important,
+several open sourced time series databases are intorduced in the world.
+However, few of them are developed for IoT or IIoT (Industrial IoT) scenario in particular.
+
+
+We choose 3 kinds of TSDBs here.
+
+* InfluxDB - Native Time series database
+
+ InfluxDB is one of the most popular TSDBs.
+
+ Interface: InfluxQL and HTTP API
+
+* OpenTSDB and KairosDB - Time series database based on NoSQL
+
+ These two DBs are similar, while the first is based on HBase and the second is based on Cassandra.
+ Both of them provides RESTful style API.
+
+ Interface: Restful API
+
+* TimeSacleDB - Time series database based on Relational Database
+
+ Interface: SQL
+
+Prometheus and Druid are also famous for time series data management.
+However, Prometheus focuses on how to collect data, how to visualize data and how to alert warnings.
+Druid focuses on how to analyze data with OLAP workload. We omit them here.
+
+
+## Comparison
+We compare the above time series database from two aspects: the feature comparison and the performance
+comparison.
+
+
+### Feature Comparison
+
+I list the basic features comparison of these databases.
+
+Legend:
+- O: big support greatly
+- o: support
+- x: not support
+- :\-( : support but not very good
+- ?: unknown
+
+
+#### Basic Features
+
+| TSDB | IoTDB | InfluxDB | OpenTSDB | KairosDB | TimescaleDB |
+|-----------------------------|-----------------------------|------------|------------|------------|-------------|
+| OpenSource | **o** | o | o | **o** | o |
+| SQL\-like | o | o | x | x | **O** |
+| Schema | "Tree\-based, tag\-based\" | tag\-based | tag\-based | tag\-based | Relational |
+| Writing out\-of\-order data | o | o | o | o | o |
+| Schema\-less | o | o | o | o | o |
+| Batch insertion | o | o | o | o | o |
+| Time range filter | o | o | o | o | o |
+| Order by time | **O** | o | x | x | o |
+| Value filter | o | o | x | x | o |
+| Downsampling | **O** | o | o | o | o |
+| Fill | **O** | o | o | x | o |
+| LIMIT | o | o | o | o | o |
+| SLIMIT | o | o | x | x | ? |
+| Latest value | O | o | o | x | o |
+
+**Details**
+
+* OpenSOurce:
+
+ * IoTDB uses Apache License 2.0 and it is in Apache incubator.
+ * InfluxDB uses MIT license. However, **the cluster version is not open sourced**.
+ * OpenTSDB uses LGPL2.1, which **is not compatible with Apache License**.
Review comment:
How about describing what's special about the LGPL?
eg:
This means that any changes you make must also be open source
##########
File path: docs/UserGuide/9-Comparison/TSDB-Comparison.md
##########
@@ -0,0 +1,400 @@
+<!--
+
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+
+-->
+
+## Known Time Series Database
+
+As the time series data is more and more important,
+several open sourced time series databases are intorduced in the world.
+However, few of them are developed for IoT or IIoT (Industrial IoT) scenario in particular.
+
+
+We choose 3 kinds of TSDBs here.
+
+* InfluxDB - Native Time series database
+
+ InfluxDB is one of the most popular TSDBs.
+
+ Interface: InfluxQL and HTTP API
+
+* OpenTSDB and KairosDB - Time series database based on NoSQL
+
+ These two DBs are similar, while the first is based on HBase and the second is based on Cassandra.
+ Both of them provides RESTful style API.
+
+ Interface: Restful API
+
+* TimeSacleDB - Time series database based on Relational Database
+
+ Interface: SQL
+
+Prometheus and Druid are also famous for time series data management.
+However, Prometheus focuses on how to collect data, how to visualize data and how to alert warnings.
+Druid focuses on how to analyze data with OLAP workload. We omit them here.
+
+
+## Comparison
+We compare the above time series database from two aspects: the feature comparison and the performance
+comparison.
+
+
+### Feature Comparison
+
+I list the basic features comparison of these databases.
+
+Legend:
+- O: big support greatly
+- o: support
+- x: not support
+- :\-( : support but not very good
+- ?: unknown
+
+
+#### Basic Features
+
+| TSDB | IoTDB | InfluxDB | OpenTSDB | KairosDB | TimescaleDB |
+|-----------------------------|-----------------------------|------------|------------|------------|-------------|
+| OpenSource | **o** | o | o | **o** | o |
+| SQL\-like | o | o | x | x | **O** |
+| Schema | "Tree\-based, tag\-based\" | tag\-based | tag\-based | tag\-based | Relational |
+| Writing out\-of\-order data | o | o | o | o | o |
+| Schema\-less | o | o | o | o | o |
+| Batch insertion | o | o | o | o | o |
+| Time range filter | o | o | o | o | o |
+| Order by time | **O** | o | x | x | o |
+| Value filter | o | o | x | x | o |
+| Downsampling | **O** | o | o | o | o |
+| Fill | **O** | o | o | x | o |
+| LIMIT | o | o | o | o | o |
+| SLIMIT | o | o | x | x | ? |
+| Latest value | O | o | o | x | o |
+
+**Details**
+
+* OpenSOurce:
Review comment:
OpenSource
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