Use Files.setPosixFilePermissions for chmod when possible #22
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I am using lmdbjni for joining data inside MapReduce jobs where the maps are generally short lived.
Those processes can be configured with both
-Xms
and-Xmx
to ensure enough memory is available but loading the library slows down the process at startup as it needs to fork the whole process in order to executechmod
in GNU/Linux.The following code change uses Java 7 facilities for setting permissions and is backward compatible with Java 5/6 thanks to reflection:
Files.setPosixFilePermissions
to avoid forking the JVM for executingchmod 755
when possible (Java 7+)Runtime#exec()