Caching and Data Integrity Recommendations

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When to Use WRITETHRU Files

WRITETHRU is useful for ensuring that updates to data and index files are written to the file system cache (or to disk in the case of ISAM updates) at the time of the update (or commit in the case of PREIMG WRITETHRU files). PREIMG and non-transaction files that do not use WRITETHRU can experience significant data loss due to unwritten cached data in the event of an abnormal server termination.