SeedDB.lookupByName searche for lowercase peerNames, while MapColumnIndex.getIndex uses peername as is in the keyset.
Changed the index init to insert lowercase peer names as key
- a new database for url reference data ('seen links')
- a new database extending the references to the full url metadata
attributes set which shall replace the old metadata database if it is
finished
- migration help classes stub to use old and new metadata databases
simultanously
See
http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/ConcurrentLinkedQueue.html
and the following test programm:
public class QueueLengthTimeTest {
public static long countTest(Queue<Integer> q, int c) {
long t = System.currentTimeMillis();
for (int i = 0; i < c; i++) {
q.add(q.size());
}
return System.currentTimeMillis() - t;
}
public static void main(String[] args) {
int c = 1;
for (int i = 0; i < 100; i++) {
Runtime.getRuntime().gc();
long t1 = countTest(new ArrayBlockingQueue<Integer>(c), c);
Runtime.getRuntime().gc();
long t2 = countTest(new LinkedBlockingQueue<Integer>(), c);
Runtime.getRuntime().gc();
long t3 = countTest(new ConcurrentLinkedQueue<Integer>(),
c);
System.out.println("count = " + c + ": ArrayBlockingQueue =
" + t1 + ", LinkedBlockingQueue = " + t2 + ", ConcurrentLinkedQueue = "
+ t3);
c = c * 2;
}
}
}
during receiving of DHT submissions and when answering remote search
requests. Both events together may have caused IO-deadlocking and this
commit shall fix that.
method. This is much faster and produces less blocking when using the
Compressor class which is used by the HTCache. I.e. picture search is
much faster now.
Hashtable is an obsolete collection v1, now since v2 offers HashMap with same or better
functionality. Please review, almost all code was already moved, so only a few changes. That is not the issue,
but I found notices that some (ugly big) helper classes had to be created in past
to compensate missing Hashtable's functionality. I'd like input if we can remove some of them.
look for //FIX: if these commits
Signed-off-by: Marek Otahal <markotahal@gmail.com>
Michael Peter Christen