SmartSense Gateway
The following configuration properties are available for the SmartSense Gateway:
Table 3.4. SmartSense Gateway Configuration Properties
| Property Name | Description | Where to Configure | Guidelines |
|---|---|---|---|
|
security.openssl.digest.algorithms |
A comma separated list of supported algorithms for SSL. Type: string Default Value: sha256,sha384,sha512,sha,sha1,md5 |
Ambari Config: N/A Config File: /etc/hst/conf/hst-gateway.ini | Typically it there is no need to modify this as sha256,sha512 are available and provide strong encryption. Change this only if you have a very specific requirement. |
| security.gateway.cert.name |
Use this property if you have to use a custom root Certificate Authority for SmartSense Gateway operations. This file must exist at /var/lib/hst-gateway/keys before gateway is started. Type: string Default Value: ca.crt |
Ambari Config: N/A Config File: /etc/hst/conf/hst-gateway.ini |
You can set up your own CA to sign certificates for two-way SSL communication between HST server and SmartSense Gateway. Modify this property to customize the root CA. |
|
gateway.thread.pool.size |
Thread pool for the gateway server's API endpoint. Default is automatically calculated based on CPU cores. Type: int Default Value: (Automatically calculated) |
Ambari Config: N/A Config File: /etc/hst/conf/hst-gateway.ini | Since the count is already dynamic, it is usually not required to change it. |
| gateway.start.validation.enabled |
Enables the outbound connectivity check that SmartSense Gateway performs during startup. By default, the connectivity check in enabled. Type: boolean Default Value: true |
Ambari Config: N/A Config File: /etc/hst/conf/hst-gateway.ini | Set to false if you use an HTTP proxy for gateway and gateway start command fails with "unable to connect" error. There is bug in SmartSense Gateway versions earlier than 1.3.2 where the socket connectivity test does not use the intended proxy. |
|
gateway.cache.expiry.hours |
The frequency with which the SmartSense Gateway cache is refreshed. Gateway caches the outbound connectivity status to report to HST server. By default, this cache is refreshed every two hours and upon gateway startup. Type: int Default Value: 2 |
Ambari Config: N/A Config File: /etc/hst/conf/hst-gateway.ini |
Tweak this property to refresh the outbound connectivity status. |
|
gateway.data.transfer.buffer.size |
Buffer size for data transfer via SmartSense Gateway. Gateway uses chunked buffers to transfer encrypted data between SmartSense and Hortonworks Datalake. Type: int Default Value: 4096 |
Ambari Config: N/A Config File: /etc/hst/conf/hst-gateway.ini |
Tune this property to effectively use the network bandwidth for communication between HST server and Hortonworks. |