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From "Karthick Sankarachary (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2453) Make Index Output Buffer Size Configurable
Date Mon, 10 May 2010 06:43:48 GMT
Make Index Output Buffer Size Configurable
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                 Key: LUCENE-2453
                 URL: https://issues.apache.org/jira/browse/LUCENE-2453
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Store
    Affects Versions: 3.0.1
            Reporter: Karthick Sankarachary


Currently, the buffered index input class allows sub-classes and users thereof to specify
a size for the input buffer, which by default is 1024 bytes. In practice, this option is leveraged
by the simple file and compound segment index input sub-classes. 

By the same token, it would be nice if the buffered index output class could open up it's
buffer size for users to configure. In particular, this would allow sub-classes thereof to
align the output buffer size, which by default is 16348 bytes, to that of the underlying directory's
data unit. For example, a network-based directory might want to buffer data in multiples of
it's maximum transmission unit. To use an existing use-case, the file system-based directory
could potentially choose to align it's output buffer size to the operating system's file block
size.

The proposed change to the buffered index output class involves defining a one-arg constructor
that takes a user-defined buffer size, and a default constructor that uses the currently defined
buffer size.

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