open

Creates an FSDirectory instance, trying to pick the best implementation given the current environment. The directory returned uses the NativeFSLockFactory. The directory is created at the named location if it does not yet exist.

FSDirectory resolves the given Path when calling this method to a canonical / real path to ensure it can correctly lock the index directory and no other process can interfere with changing possible symlinks to the index directory inbetween. If you want to use symlinks and change them dynamically, close all IndexWriters and create a new FSDirectory instance.

Currently this returns MMapDirectory for Linux, MacOSX, Solaris, and Windows 64-bit JREs, and NIOFSDirectory for other JREs. It is highly recommended that you consult the implementation's documentation for your platform before using this method.

NOTE: this method may suddenly change which implementation is returned from release to release, in the event that higher performance defaults become possible; if the precise implementation is important to your application, please instantiate it directly, instead. For optimal performance you should consider using MMapDirectory on 64 bit JVMs.

See #subclasses