Chris Nauroth created HADOOP-12172: -------------------------------------- Summary: FsShell mkdir -p makes an unnecessary check for the existence of the parent. Key: HADOOP-12172 URL: https://issues.apache.org/jira/browse/HADOOP-12172 Project: Hadoop Common Issue Type: Improvement Components: fs Reporter: Chris Nauroth Assignee: Chris Nauroth Priority: Minor
The {{mkdir}} command in {{FsShell}} checks for the existence of the parent of the directory and returns an error if it doesn't exist. The {{-p}} option suppresses the error and allows the directory creation to continue, implicitly creating all missing intermediate directories. However, the existence check still runs even with {{-p}} specified, and its result is ignored. Depending on the file system, this is a wasteful RPC call (HDFS) or HTTP request (WebHDFS/S3/Azure) imposing extra latency for the client and extra load for the server. -- This message was sent by Atlassian JIRA (v6.3.4#6332)