Appendix A. Additional Journal Store Properties
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Appendix A. Additional Journal Store Properties

Table of Contents

A.1. Property Reference

This appendix describes additional journal store properties. These advanced properties can be used to resolve performance issues or functional differences between platforms.

A.1. Property Reference

  • jeus.store.journal.control-file-name

    Description Save a control file under a different name. This attribute is only used under special circumstances.
    Default control.dat

  • jeus.store.journal.log-file-mode

    Description File mode used to open a log file. Set one of "rw", "rws", and "rwd". If set to "rw", file force is forcibly executed.
    Default rwd

  • jeus.store.journal.max-move-count

    Description If a log file becomes full, an overflow processing executes to secure the required space. During the overflow processing, the records that have not been used for a long time will be moved to a secondary storage to prevent performance degradation. This property is used to set the allowed maximum number of times the surplus records can be moved.
    Default 1

  • jeus.store.journal.overflow-factor

    Description If the current log file's unused space ratio is the same or less than the specified rate, overflow is checked.
    Default0.5

  • jeus.store.journal.min-buffer-size

    Description Minimum buffer size for writing records in batch.
    Default4KB

  • jeus.store.journal.max-buffer-size

    Description Largest buffer size for writing records in batch.
    Default 4MB

  • jeus.store.journal.use-direct-buffer

    Description Option to use DirectByteBuffer when writing through the FileChannel.
    Default false

  • jeus.store.journal.max-waiting-thread-count

    Description Maximum number of threads that are waiting to use the buffer.
    Default32

  • jeus.store.journal.sync-forcefully

    Description Option to forcibly call sync regardless of the log-file-mode when opening the FileChannel. The file mode may not function properly on some OSs.
    Default false
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