27 lines
786 B
Markdown
27 lines
786 B
Markdown
# pvAccessCPP: ca provider
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2018.10.05
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Editors:
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* Marty Kraimer
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**ca** is a channel provider **ca** that is implemented as part of **pvAccessCPP**.
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It uses the **channel access** network protocol to communicate with a server,
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i. e. the network protocol that has been used to communicate with **EPICS IOCs** since 1990.
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A description of **ca** is provided in
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[caProvider](https://mrkraimer.github.io/website/caProvider/caProvider.html)
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Provider **pva** is another way to connect to a **DBRecord**,
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But this only works if the IOC has **qsrv** installed.
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**qsrv**, which is provided with
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[pva2pva](https://github.com/epics-base/pva2pva),
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has full support for communicating with a **DBRecord**.
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The only advantage of **ca** is that it does require any changes to an existing IOC.
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