this.directories = directories;
this.indexManager = new SecondaryIndexManager(this);
this.metric = new ColumnFamilyMetrics(this);
fileIndexGenerator.set(generation);
Caching caching = metadata.getCaching();
logger.info("Initializing {}.{}", table.name, columnFamily);
// scan for sstables corresponding to this cf and load them
data = new DataTracker(this);