src/java/org/apache/cassandra/streaming/StreamOut.java
/**
     * Flushes matching column families from the given keyspace, or all columnFamilies
     * if the cf list is empty.
     */
Flushes matching column families from the given keyspace, or all columnFamilies
if the cf list is empty.
Flushes matching column families from the given keyspace or all columnFamilies if the cf list is empty .
private static void flushSSTables(Iterable<ColumnFamilyStore> stores) throws IOException
    {
        logger.info("Flushing memtables for {}...", stores);
        List<Future<?>> flushes;
        flushes = new ArrayList<Future<?>>();
        for (ColumnFamilyStore cfstore : stores)
        {
            Future<?> flush = cfstore.forceFlush();
            if (flush != null)
                flushes.add(flush);
        }
        FBUtilities.waitOnFutures(flushes);
    }
private static void flushSSTables ( Iterable < ColumnFamilyStore > stores ) throws IOException { logger . info ( "Flushing memtables for {}..." , stores ) ; List < Future < ? > > flushes ; flushes = new ArrayList < Future < ? > > ( ) ; for ( ColumnFamilyStore cfstore : stores ) { Future < ? > flush = cfstore . forceFlush ( ) ; if ( flush != null ) flushes . add ( flush ) ; } FBUtilities . waitOnFutures ( flushes ) ; }
Flushes matching column families from the given keyspace, or all columnFamilies
 if the cf list is empty.
Flushes matching column families from the given keyspace or all columnFamilies if the cf list is empty .