---
title: "Batch mode and load balancing"
url: "https://axoflow.com/docs/axosyslog-core/4.28/chapter-destinations/configuring-destinations-redis/destination-redis-batch/"
last_modified: "2023-07-02T20:37:04+02:00"
---

> For the complete documentation index, see [llms.txt](https://axoflow.com/docs/axosyslog-core/4.28/llms.txt).

# Batch mode and load balancing

Starting with version 3.34, you can send multiple log messages with the help of [Redis’s pipelining feature](https://github.com/redis/hiredis#pipelining).

## Batch size

The `batch-lines()`, `batch-lines()`, and `batch-timeout()` options of the destination determine how many log messages AxoSyslog sends in a batch. The `batch-lines()` option determines the maximum number of messages AxoSyslog puts in a batch in. This can be limited based on size and time:

AxoSyslog sends a batch every `batch-timeout()` milliseconds, even if the number of messages in the batch is less than `batch-lines()`. That way the destination receives every message in a timely manner even if suddenly there are no more messages.

To increase the performance of the destination, increase the number of worker threads for the destination using the `workers()` option, or adjust the `batch-lines()` and/or `batch-timeout()` options.

## Example: Redis batch mode

The following destination sends log messages to a Redis server using the pipelining feature. A batch consists of `100` messages and is sent every `10` seconds (`10000` milliseconds) if there is less than `100` messages are in the queue.

```shell
   destination d_redis {
        redis(
            host("localhost")
            port(6379)
            command("HINCRBY", "hosts", "$HOST", "1")
            batch-lines(100)
            batch-timeout(10000)
            log-fifo-size(100000)
        );
    };
```

Last modified July 2, 2023: [Change highlight mode of code examples (2f8a9593)](https://github.com/axoflow/axosyslog-core-docs/commit/2f8a95937c6498193e7168ce8b0dc831e9f0f8ad)