How to load data from Rocket.chat to Clickhouse
Learn how to use Airbyte to synchronize your Rocket.chat data into Clickhouse within minutes.


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How to Sync to Manually
Step 1: Extract Data from Rocket.Chat
Start by accessing the Rocket.Chat MongoDB database directly using MongoDB's native tools. Use the `mongoexport` command to extract the desired data in JSON or CSV format. For example, for JSON:
```bash
mongoexport --db=rocketchat --collection=messages --out=messages.json
```
Adjust database names, collection names, and fields as necessary to suit your data requirements.
Step 2: Prepare Data for ClickHouse
Once data is exported, it may require formatting adjustments to suit ClickHouse's columnar storage format. Use scripts in Python or shell to clean and transform JSON or CSV data, ensuring consistent data types and any necessary fields are included. For JSON to CSV conversion:
```python
import pandas as pd
data = pd.read_json('messages.json')
data.to_csv('messages.csv', index=False)
```
Step 3: Install ClickHouse
If not already installed, set up ClickHouse on your desired machine. You can follow the official installation guide which usually involves using package managers like `apt` for Ubuntu:
```bash
sudo apt-get install -y clickhouse-server clickhouse-client
```
Step 4: Create ClickHouse Table Structure
Access the ClickHouse client and create tables that match the structure of your Rocket.Chat data. Define tables with appropriate data types and columns that align with your transformed data. For instance:
```sql
CREATE TABLE messages (
id String,
text String,
timestamp DateTime,
user_id String
) ENGINE = MergeTree()
ORDER BY id;
```
Step 5: Load Data into ClickHouse
Import the prepared CSV data into the ClickHouse tables using the `clickhouse-client`. Use the `INSERT` command to load data:
```bash
clickhouse-client --query="INSERT INTO messages FORMAT CSV" < messages.csv
```
Step 6: Verify Data Integrity
Conduct queries on the ClickHouse tables to ensure data integrity and completeness after the import. Use simple SELECT queries to verify row counts and field data:
```sql
SELECT COUNT(*) FROM messages;
SELECT * FROM messages LIMIT 10;
```
Step 7: Automate the Process
To keep the warehouse updated with Rocket.Chat data, automate the extraction, transformation, and loading process using cron jobs or scripts. Create a shell script that includes all previous steps and schedule it:
```bash
crontab -e
# Add the following line to run the script daily at midnight
0 0 * * * /path/to/your/script.sh
```
By following these steps, you can efficiently move data from Rocket.Chat to a ClickHouse warehouse without relying on third-party connectors or integrations.