# Configurations
Streambased K.S.I. is configured by the standard Kroxylicious configuration scheme [here](https://kroxylicious.io/documentation/0.18.0/html/kroxylicious-proxy/#assembly-configuring-proxy-proxy) or by equivalent environment variables documented here:
#### Environment Variables
```properties
KSI_BOOTSTRAP_SERVERS
```
Bootstrap servers for the underlying Kafka cluster
* Type: string
* Example:
```
KSI_BOOTSTRAP_SERVERS=kafka1:9092
```
***
```properties
KSI_GATEWAY_BOOTSTRAP_ADDRESS
```
The address that clients should connect to to access the proxy.
* Type: string
* Example:
```json
KSI_GATEWAY_BOOTSTRAP_ADDRESS=ksi:9192
```
***
```properties
KSI_COLD_STORAGE_TYPE
```
The method in which K.S.I. will interact with Iceberg, supported values are:
\* spark-connect
\* iceberg
* Type: string
* Example:
```json
KSI_COLD_STORAGE_TYPE=spark-connect
```
***
```properties
KSI_SPARK_CONNECT_URL
```
The Url of Spark-Connect, this should only be used when `KSI_COLD_STORAGE_TYPE` is `spark-connect`.
* Type: string
* Example:
```json
KSI_SPARK_CONNECT_URL=sc://spark-iceberg:15002
```
***
```properties
KSI_MAX_COLD_STORAGE_RECORDS_PER_FETCH
```
The maximum number of Iceberg records to return for any signle FETCH response.
* Type: integer
* Example:
KSI_MAX_COLD_STORAGE_RECORDS_PER_FETCH=1000
***
```properties
KSI_COLD_STORAGE_TIMEOUT_MS
```
The maximum time K.S.I. will wait for records from Iceberg before returning to Kroxylicious
* Type: integer
* Example:
```
KSI_COLD_STORAGE_TIMEOUT_MS=30000
```
***
```properties
KSI_ALWAYS_RETURN_MINUS_ONE_START_OFFSET
```
Whether or not K.S.I. should return a -1 start offset for any topics it manages. A value of `true` indicates that this topic has infiinite retention and is managed by K.S.I.
* Type: boolean
* Example:
```
KSI_ALWAYS_RETURN_MINUS_ONE_START_OFFSET=true
```
***
```properties
KSI_ICEBERG_NAMESPACE
```
The namespace that contains the Iceberg data
* Type: string
* Example:
```
KSI_ICEBERG_NAMESPACE=coldset
```
***
```properties
KSI_SPARK_CATALOG_NAME
```
The catalog that contains the Iceberg data
* Type: string
* Example:
```
KSI_SPARK_CATALOG_NAME=direct
```
***
```properties
KSI_SCHEMA_REGISTRY_URL
```
The Schema Registry url for retrieving topic schemas
* Type: string
* Example:
```
KSI_SCHEMA_REGISTRY_URL=http://schema-registry:808
```
---
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