markdown elassandra圣经

Posted 2021-05-05

# Elassandra Bible
## Install

## Migrate from Cassandra
---
### 1. Take backups
- Create snapshots
- Copy the configuration somewhere else

### 2. Uninstall Cassandra

### 3. Start Cassandra
```
/usr/bin/cassandra -R -Dcassandra.ignore_dc=true -Dcassandra.ignore_rack=true
```

### 4. Repair snitch
```
nodetool repair
nodetool cleanup
```

### 5. Start Elassandra as normal
```
systemctl start cassandra
```

### 6. Create indices
```
curl -XPUT -H 'Content-Type: application/json' 'http://localhost:9200/<keyspace>' -d '{
    "settings": { "keyspace":"<keyspace>" }
}'
```