this will cause better computation speed for single- and multi-core;
there are enhancements that will speed up old and slow machines as well
as multi-core CPUs. Indexing of surrogates has been speed up
from 4000 PPM to over 20000 PPM on a simple dual core office computer.
Since the enhancements are mostly in core routines, the hack should also
speed up search performance.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6276 6c8d7289-2bf4-0310-a012-ef5d649a1542
- added new Stack class that implements a stack on BLOB files
- added new Stacks class that can be used for a set of Stacks (a 'Stack Database')
- added methods to other classes to support the new stacks
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6169 6c8d7289-2bf4-0310-a012-ef5d649a1542
high-performance search query situations as seen in yacy-metager integration showed deadlock situation caused by synchronization effects inside of sun.java code. It appears that the logger is not completely safe against deadlock situations in concurrent calls of the logger. One possible solution would be a outside-synchronization with 'synchronized' statements, but that would further apply blocking on all high-efficient methods that call the logger. It is much better to do a non-blocking hand-over of logging lines and work off log entries with a concurrent log writer. This also disconnects IO operations from logging, which can also cause IO operation when a log is written to a file. This commit not only moves the logger from kelondro to yacy.logging, it also inserts the concurrency methods to realize non-blocking logging.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6078 6c8d7289-2bf4-0310-a012-ef5d649a1542
- fixed too early computation of navigation
- moved navigation rendering to yacysearchtrailer
- added more asserts
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6006 6c8d7289-2bf4-0310-a012-ef5d649a1542
- download a wikipedia dump, i.e. dewiki-20090311-pages-articles.xml.bz2
from http://download.wikimedia.org/dewiki/20090311/
- move dewiki-20090311-pages-articles.xml.bz2 to DATA/HTCACHE/
- start the conversion; open a command shell, move to the yacy home directory and execute
java -Xmx2000m -cp classes:lib/bzip2.jar de.anomic.tools.mediawikiIndex -convert DATA/HTCACHE/dewiki-20090311-pages-articles.xml.bz2 DATA/SURROGATES/in/ http://de.wikipedia.org/wiki/
this generates a series of files to DATA/SURROGATES/in
if YaCy is running (it may run concurrently), it fetches all new dumps in the surrogate-in directory. The export process is transaction-save, that means YaCy will not start reading a dump while the dump is not completely finished.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5851 6c8d7289-2bf4-0310-a012-ef5d649a1542
this option was never used and there is also no use to set other columns but the first as the primary key. as a result, access methods to the key do not need to compute key positions, and they work faster.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5711 6c8d7289-2bf4-0310-a012-ef5d649a1542
Java standard classes provide a Map Interface, that has a put() method that returns the object that was replaced by the object that was the argument of the put call. The kelondro ObjectIndex defined a put method in the same way, that means it also returned the previous value of the Entry object before the put call. However, this value was not used by the calling code in the most cases. Omitting a return of the previous value would cause some performance benefit. This change implements a put method that does not return the previous value to reflect the common use. Omitting the return of previous values will cause some benefit in performance. The functionality to get the previous value is still maintained, and provided with a new 'replace' method.
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5700 6c8d7289-2bf4-0310-a012-ef5d649a1542
- some hacks for less memory usage:
-- less usage of buffer and cache memory in EcoFS
-- buffer allocation on-demand in BufferedIOChunks
-- removed largest ybr idx
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5595 6c8d7289-2bf4-0310-a012-ef5d649a1542
orbiter