25 lines
1.0 KiB
Markdown
25 lines
1.0 KiB
Markdown
# Namespace
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## Background
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SkyWalking is a monitoring tool, which collects metrics from a distributed system. In the real world, a very large distributed system
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includes hundreds of services, thousands of service instances. In that case, most likely, more than one group,
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even more than one company are maintaining and monitoring the distributed system. Each one of them takes charge of different parts,
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don't want or shouldn't share there metrics.
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Namespace is the proposal from this.It is used for tracing and monitoring isolation.
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## Set the namespace
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### Set agent.namespace in agent config
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```properties
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# The agent namespace
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# agent.namespace=default-namespace
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```
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The default value of `agent.namespace` is empty.
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**Influence**
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The default header key of SkyWalking is `sw3`, more in this [document](../../../protocols/Skywalking-Cross-Process-Propagation-Headers-Protocol-v1.md).
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After `agent.namespace` set, the key changes to `namespace-sw3`.
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The across process propagation chain breaks, when the two sides are using different namespace.
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