public static SSTableReader sstable(
int generation, int size, boolean keepRef, ColumnFamilyStore cfs) {
Descriptor descriptor =
new Descriptor(
cfs.getDirectories().getDirectoryForNewSSTables(),
cfs.keyspace.getName(),
cfs.getColumnFamilyName(),
generation);
Set<Component> components =
ImmutableSet.of(Component.DATA, Component.PRIMARY_INDEX, Component.FILTER, Component.TOC);
for (Component component : components) {
File file = new File(descriptor.filenameFor(component));
try {
file.createNewFile();
} catch (IOException e) {
}
}
if (size > 0) {
try {
File file = new File(descriptor.filenameFor(Component.DATA));
try (RandomAccessFile raf = new RandomAccessFile(file, "rw")) {
raf.setLength(size);
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
SerializationHeader header = SerializationHeader.make(cfs.metadata, Collections.emptyList());
StatsMetadata metadata =
(StatsMetadata)
new MetadataCollector(cfs.metadata.comparator)
.finalizeMetadata(
cfs.metadata.partitioner.getClass().getCanonicalName(), 0.01f, -1, header)
.get(MetadataType.STATS);
SSTableReader reader =
SSTableReader.internalOpen(
descriptor,
components,
cfs.metadata,
segmentedFile.sharedCopy(),
segmentedFile.sharedCopy(),
indexSummary.sharedCopy(),
new AlwaysPresentFilter(),
1L,
metadata,
SSTableReader.OpenReason.NORMAL,
header);
reader.first = reader.last = readerBounds(generation);
if (!keepRef) reader.selfRef().release();
return reader;
}
public SizeTieredCompactionStrategy(ColumnFamilyStore cfs, Map<String, String> options) {
super(cfs, options);
this.estimatedRemainingTasks = 0;
String optionValue = options.get(MIN_SSTABLE_SIZE_KEY);
minSSTableSize = optionValue == null ? DEFAULT_MIN_SSTABLE_SIZE : Long.parseLong(optionValue);
optionValue = options.get(BUCKET_LOW_KEY);
bucketLow = optionValue == null ? DEFAULT_BUCKET_LOW : Double.parseDouble(optionValue);
optionValue = options.get(BUCKET_HIGH_KEY);
bucketHigh = optionValue == null ? DEFAULT_BUCKET_HIGH : Double.parseDouble(optionValue);
if (bucketHigh <= bucketLow) {
logger.warn(
"Bucket low/high marks for {} incorrect, using defaults.", cfs.getColumnFamilyName());
bucketLow = DEFAULT_BUCKET_LOW;
bucketHigh = DEFAULT_BUCKET_HIGH;
}
cfs.setCompactionThresholds(
cfs.metadata.getMinCompactionThreshold(), cfs.metadata.getMaxCompactionThreshold());
}