A Remoting Split Policy For Managing Multiple Remote Directories
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Key: LUCENE-2433
URL: https://issues.apache.org/jira/browse/LUCENE-2433
Project: Lucene - Java
Issue Type: New Feature
Reporter: Karthick Sankarachary
(Please note that the feature described in LUCENE-2425 is required reading for
this issue.)
The remoting split policy is an abstraction for a split index, where each
sub-index points to a (potentially remote) URI-based directory. More formally,
it establishes mappings between URIs and directories using the concept of a
URIDirectory. Basically, that interface allows one to construct a directory
instance based on a URI value.
Currently, the following two URIs have been mapped:
a) File URI: In this case, the path specified in the file URI maps to the
location of a FSDirectory. While the path usually points to a folder in the
local file system, it may refer to a NFS mount point, in which case the
sub-directory is not co-located with the super-directory of the split index.
b) RAM URI: In this case, the path specified in the URI may be empty, in which
case a volatile RAMDirectory is created. In the event the path is non-empty,
the RAM-based directory acts as a facade for a file-system-based directory.
More (industrial-strength) URI mappings are currently in the works, and will be
added as they become available.
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