Message Channel-related Configurations Milvus documentation

This topic introduces the message channel-related configurations of Milvus.

Under this section, you can configure the message channel name prefixes and component subscription name prefixes.

To share a Pulsar instance with multi-tenancy enabled among multiple Milvus instances, you need to change pulsar.tenant or pulsar.namespace to a unique value for each of the Milvus instances.

To share a Pulsar instance with multi-tenancy disabled among multiple Milvus instances, you need to change msgChannel.chanNamePrefix.cluster to a unique value for each of the Milvus instances.

For details, refer to Operation FAQs.

`msgChannel.chanNamePrefix.cluster`

Description	Default Value
Root name prefix of the channel when a message channel is created. It is recommended to change this parameter before starting Milvus for the first time. To share a Pulsar instance among multiple Milvus instances, consider changing this to a name rather than the default one for each Milvus instance before you start them. For details, see Operational FAQs.	"by-dev"

`msgChannel.chanNamePrefix.rootCoordTimeTick`

Description Default Value

Sub-name prefix of the message channel where the root coord publishes time tick messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordTimeTick}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "rootcoord-timetick"

Description	Default Value
Sub-name prefix of the message channel where the root coord publishes time tick messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordTimeTick}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"rootcoord-timetick"

`msgChannel.chanNamePrefix.rootCoordStatistics`

Description Default Value

Sub-name prefix of the message channel where the root coord publishes its own statistics messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordStatistics}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "rootcoord-statistics"

Description	Default Value
Sub-name prefix of the message channel where the root coord publishes its own statistics messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordStatistics}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"rootcoord-statistics"

`msgChannel.chanNamePrefix.rootCoordDml`

Description Default Value

Sub-name prefix of the message channel where the root coord publishes Data Manipulation Language (DML) messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordDml}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "rootcoord-dml"

Description	Default Value
Sub-name prefix of the message channel where the root coord publishes Data Manipulation Language (DML) messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordDml}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"rootcoord-dml"

`msgChannel.chanNamePrefix.rootCoordDelta`

Description Default Value

Sub-name prefix of the message channel where the root coord publishes data deletion messages in sealed segment.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordDelta}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "rootcoord-delta"

Description	Default Value
Sub-name prefix of the message channel where the root coord publishes data deletion messages in sealed segment. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.rootCoordDelta}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"rootcoord-delta"

`msgChannel.chanNamePrefix.search`

Description	Default Value
Sub-name prefix of the message channel where the proxy publishes search messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.search}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"search"

`msgChannel.chanNamePrefix.searchResult`

Description Default Value

Sub-name prefix of the message channel where the query node publishes search result messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.searchResult}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "searchResult"

Description	Default Value
Sub-name prefix of the message channel where the query node publishes search result messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.searchResult}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"searchResult"

`msgChannel.chanNamePrefix.proxyTimeTick`

Description Default Value

Sub-name prefix of the message channel where the proxy publishes time tick messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.proxyTimeTick}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "proxyTimeTick"

Description	Default Value
Sub-name prefix of the message channel where the proxy publishes time tick messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.proxyTimeTick}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"proxyTimeTick"

`msgChannel.chanNamePrefix.queryTimeTick`

Description Default Value

Sub-name prefix of the message channel where the query node publishes time tick messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.queryTimeTick}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "queryTimeTick"

Description	Default Value
Sub-name prefix of the message channel where the query node publishes time tick messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.queryTimeTick}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"queryTimeTick"

`msgChannel.chanNamePrefix.queryNodeStats`

Description Default Value

Sub-name prefix of the message channel where the query node publishes its own statistics messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.queryNodeStats}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "query-node-stats"

Description	Default Value
Sub-name prefix of the message channel where the query node publishes its own statistics messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.queryNodeStats}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"query-node-stats"

`msgChannel.chanNamePrefix.dataCoordInsertChannel`

Description Default Value

Sub-name prefix of the message channel where the data coord publishes data insert messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordInsertChannel}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "insert-channel-"

Description	Default Value
Sub-name prefix of the message channel where the data coord publishes data insert messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordInsertChannel}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"insert-channel-"

`msgChannel.chanNamePrefix.dataCoordStatistic`

Description Default Value

Sub-name prefix of the message channel where the data coord publishes its own statistics messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordStatistic}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "datacoord-statistics-channel"

Description	Default Value
Sub-name prefix of the message channel where the data coord publishes its own statistics messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordStatistic}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"datacoord-statistics-channel"

`msgChannel.chanNamePrefix.dataCoordTimeTick`

Description Default Value

Sub-name prefix of the message channel where the data coord publishes time tick messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordTimeTick}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "datacoord-timetick-channel"

Description	Default Value
Sub-name prefix of the message channel where the data coord publishes time tick messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordTimeTick}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"datacoord-timetick-channel"

`msgChannel.chanNamePrefix.dataCoordSegmentInfo`

Description Default Value

Sub-name prefix of the message channel where the data coord publishes segment information messages.

The complete channel name prefix is ${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordSegmentInfo}

Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data.

It is recommended to change this parameter before starting Milvus for the first time. "segment-info-channel"

Description	Default Value
Sub-name prefix of the message channel where the data coord publishes segment information messages. The complete channel name prefix is `${msgChannel.chanNamePrefix.cluster}-${msgChannel.chanNamePrefix.dataCoordSegmentInfo}` Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"segment-info-channel"

`msgChannel.subNamePrefix.rootCoordSubNamePrefix`

Description	Default Value
Subscription name prefix of the root coord. Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"rootCoord"

`msgChannel.subNamePrefix.proxySubNamePrefix`

Description	Default Value
Subscription name prefix of the proxy. Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"proxy"

`msgChannel.subNamePrefix.queryNodeSubNamePrefix`

Description	Default Value
Subscription name prefix of the query node. Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"queryNode"

`msgChannel.subNamePrefix.dataNodeSubNamePrefix`

Description	Default Value
Subscription name prefix of the data node. Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"dataNode"

`msgChannel.subNamePrefix.dataCoordSubNamePrefix`

Description	Default Value
Subscription name prefix of the data coord. Caution: Changing this parameter after using Milvus for a period of time will affect your access to old data. It is recommended to change this parameter before starting Milvus for the first time.	"dataCoord"