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由 Ning Yu 提交于
We used to store them under /tmp/, we include the postmaster port number in the file name in the hope that two clusters will not conflict with each other on this file. However the conflict still happen in the test src/bin/pg_basebackup. And it can also happen if a second cluster is missed configured by accident. So to make things safe we also include the postmaster pid in the domain socket path, there is no chance for two postmasters to share the same pids. Reviewed-by: NPaul Guo <pguo@pivotal.io>
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