org.apache.lucene.benchmark.byTask.tasks

## Class CreateIndexTask

- java.lang.Object
- - org.apache.lucene.benchmark.byTask.tasks.PerfTask
  - - org.apache.lucene.benchmark.byTask.tasks.CreateIndexTask

- All Implemented Interfaces:
    Cloneable

      public class CreateIndexTask
      extends PerfTask

  Create an index.
  Other side effects: index writer object in perfRunData is set.
  Relevant properties: `merge.factor (default 10), max.buffered (default no flush), compound (default true), ram.flush.mb [default 0], merge.policy (default org.apache.lucene.index.LogByteSizeMergePolicy), merge.scheduler (default org.apache.lucene.index.ConcurrentMergeScheduler), concurrent.merge.scheduler.max.thread.count and concurrent.merge.scheduler.max.merge.count (defaults per ConcurrentMergeScheduler), default.codec` .

  This task also supports a "writer.info.stream" property with the following values:

  - SystemOut - sets `IndexWriterConfig.setInfoStream(java.io.PrintStream)` to `System.out`.
  - SystemErr - sets `IndexWriterConfig.setInfoStream(java.io.PrintStream)` to `System.err`.
  - <file_name> - attempts to create a file given that name and sets `IndexWriterConfig.setInfoStream(java.io.PrintStream)` to that file. If this denotes an invalid file name, or some error occurs, an exception will be thrown.

- - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.benchmark.byTask.tasks.PerfTask

      `logStep, NEW_LINE, params, stopNow`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `CreateIndexTask(PerfRunData runData)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static IndexWriter` | `configureWriter(Config config, PerfRunData runData, IndexWriterConfig.OpenMode mode, IndexCommit commit)`
    `static IndexWriterConfig` | `createWriterConfig(Config config, PerfRunData runData, IndexWriterConfig.OpenMode mode, IndexCommit commit)`
    `int` | `doLogic()` Perform the task once (ignoring repetitions specification) Return number of work items done by this task.
    `static IndexDeletionPolicy` | `getIndexDeletionPolicy(Config config)`

    - ### Methods inherited from class org.apache.lucene.benchmark.byTask.tasks.PerfTask

      `clone, close, getAlgLineNum, getBackgroundDeltaPriority, getDepth, getLogMessage, getName, getParams, getRunData, getRunInBackground, isDisableCounting, runAndMaybeStats, setAlgLineNum, setDepth, setDisableCounting, setName, setParams, setRunInBackground, setup, shouldNeverLogAtStart, shouldNotRecordStats, stopNow, supportsParams, tearDown, toString`

    - ### Methods inherited from class java.lang.Object

      `equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### CreateIndexTask

          public CreateIndexTask(PerfRunData runData)

  - ### Method Detail

    - #### getIndexDeletionPolicy

          public static IndexDeletionPolicy getIndexDeletionPolicy(Config config)

    - #### doLogic

          public int doLogic()
                      throws IOException

      Description copied from class: `PerfTask`
      Perform the task once (ignoring repetitions specification) Return number of work items done by this task. For indexing that can be number of docs added. For warming that can be number of scanned items, etc.
      Specified by:
        `doLogic` in class `PerfTask`
      Returns:
        number of work items done by this task.
      Throws:
        `IOException`

    - #### createWriterConfig

          public static IndexWriterConfig createWriterConfig(Config config,
                                             PerfRunData runData,
                                             IndexWriterConfig.OpenMode mode,
                                             IndexCommit commit)

    - #### configureWriter

          public static IndexWriter configureWriter(Config config,
                                    PerfRunData runData,
                                    IndexWriterConfig.OpenMode mode,
                                    IndexCommit commit)
                                             throws IOException

      Throws:
        `IOException`

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