Example usage for org.apache.cassandra.io.sstable.format SSTableReader estimatedKeys

Introduction

In this page you can find the example usage for org.apache.cassandra.io.sstable.format SSTableReader estimatedKeys.

Prototype

public long estimatedKeys() 

Source Link

Usage

From source file:com.jeffjirsa.cassandra.db.compaction.SizeTieredCompactionStrategy.java

License:Apache License

/**
 * Returns the reads per second per key for this sstable, or 0.0 if the sstable has no read meter
 *///w w w  .j  av  a2 s  .  c  o  m
private static double hotness(SSTableReader sstr) {
    // system tables don't have read meters, just use 0.0 for the hotness
    return sstr.getReadMeter() == null ? 0.0 : sstr.getReadMeter().twoHourRate() / sstr.estimatedKeys();
}

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From source file:com.knewton.mapreduce.SSTableRecordReader.java

License:Apache License

private void setTableScanner(SSTableReader tableReader) {
    Preconditions.checkNotNull(tableReader, "Table reader not set");
    this.tableScanner = tableReader.getScanner();
    this.estimatedKeys = tableReader.estimatedKeys();
}

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