# RocketMQ
Site [llms.txt](/llms.txt)
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## RocketMQ Attributes
This group describes attributes specific to RocketMQ.
**Attributes:**
| Key | Stability | Value Type | Description | Example Values |
| --- | --- | --- | --- | --- |
| `rocketmq.consumption_model` |  | string | Model of message consumption. This only applies to consumer spans. | `clustering`; `broadcasting` [(see more)](#rocketmq-consumption-model-values) |
| `rocketmq.message.delay_time_level` |  | int | The delay time level for delay message, which determines the message delay time. | `3` |
| `rocketmq.message.delivery_timestamp` |  | int | The timestamp in milliseconds that the delay message is expected to be delivered to consumer. | `1665987217045` |
| `rocketmq.message.group` |  | string | It is essential for FIFO message. Messages that belong to the same message group are always processed one by one within the same consumer group. | `myMessageGroup` |
| `rocketmq.message.keys` |  | string[] | Key(s) of message, another way to mark message besides message ID. | `["keyA", "keyB"]` |
| `rocketmq.message.tag` |  | string | The secondary classifier of message besides topic. | `tagA` |
| `rocketmq.message.type` |  | string | Type of message. | `normal`; `fifo`; `delay` [(see more)](#rocketmq-message-type-values) |
| `rocketmq.namespace` |  | string | Namespace of RocketMQ resources, resources in different namespaces are individual. | `myNamespace` |
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`rocketmq.consumption_model` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
| --- | --- | --- |
| `broadcasting` | Broadcasting consumption model |  |
| `clustering` | Clustering consumption model |  |
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`rocketmq.message.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
| --- | --- | --- |
| `delay` | Delay message |  |
| `fifo` | FIFO message |  |
| `normal` | Normal message |  |
| `transaction` | Transaction message |  |