# BINLOG\_CHECKPOINT\_EVENT

Binlog Checkpoint Event, Event Type is 161 (0xa1). This event specifies a binlog file such that XA crash recovery can start from that file.

{% hint style="info" %}
There can be more than one event in a binlog file.
{% endhint %}

## Header

* Event type is 161 (0xa1).

## Fields

* [uint<4>](/docs/server/reference/clientserver-protocol/protocol-data-types.md#fixed-length-integers) Log filename length.
* [string\<EOF>](/docs/server/reference/clientserver-protocol/protocol-data-types.md#fixed-length-bytes) Log filename.

## Example Without CRC32

```
12 ad 26 5a a1 84 27 00  00 27 00 00 00 47 01 00  ..&Z..'..'...G..
00 00 00 10 00 00 00 6d  79 73 71 6c 2d 62 69 6e  .......mysql-bin
2e 30 30 30 30 36 32                              .000062
```

## Header, 19 Bytes

* Event Timestamp = 12 ad 26 5a.
* Event Type = a1 => 161.
* Server\_id = 84 27 00 00 => 00 00 27 84 = 10116.
* Event Size = 27 00 00 00 => 00 00 00 27 = 39.
* Next Pos = 47 01 00 00 => 00 00 01 47 = 327.
* Flags = 00 => 0.

## Content, Variable Size

* Filename length = 10 00 00 00 = >00 00 00 10 => 16.
* Filename = mysql-bin.000062.

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

{% @marketo/form formId="4316" %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://mariadb.com/docs/server/reference/clientserver-protocol/replication-protocol/binlog_checkpoint_event.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.