mirror of
https://github.com/yacy/yacy_search_server.git
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354 lines
17 KiB
Java
354 lines
17 KiB
Java
// ResourceObserver.java
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// -----------------------
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// (c) David Wieditz; lotus at mail.berlios.de
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// first published 6.2.2010
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//
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// based on the former code (c) by Detlef Reichl; detlef!reichl()gmx!org
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// Pforzheim, Germany, 2008
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//
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// part of YaCy
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.search;
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import java.io.File;
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import java.io.IOException;
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import org.apache.commons.io.FileUtils;
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import net.yacy.cora.document.WordCache;
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import net.yacy.cora.protocol.Domains;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.crawler.data.Cache;
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import net.yacy.crawler.data.ResultURLs;
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import net.yacy.data.WorkTables;
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import net.yacy.kelondro.data.word.WordReference;
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import net.yacy.kelondro.rwi.IndexCell;
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import net.yacy.kelondro.util.MemoryControl;
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import net.yacy.peers.NewsPool;
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import net.yacy.search.query.SearchEventCache;
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public class ResourceObserver {
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public static final ConcurrentLog log = new ConcurrentLog("RESOURCE OBSERVER");
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// status type for which shows where in the control-circuit model a memory state can be categorized
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public enum Space implements Comparable<Space> {
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EXHAUSTED, // smallest space state, outside of over/undershot
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NOMINAL, // wanted-space state between steady-state and under/overshot
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AMPLE; // largest space state, below steady-state
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}
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private final Switchboard sb;
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private final File path; // path to check
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private Space normalizedDiskFree = Space.AMPLE;
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private Space normalizedDiskUsed = Space.AMPLE;
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private Space normalizedMemoryFree = Space.AMPLE;
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public ResourceObserver(final Switchboard sb) {
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this.sb = sb;
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this.path = sb.getDataPath(SwitchboardConstants.INDEX_PRIMARY_PATH, "").getParentFile();
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log.info("path for disc space measurement: " + this.path);
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}
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public static void initThread() {
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final Switchboard sb = Switchboard.getSwitchboard();
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sb.observer = new ResourceObserver(Switchboard.getSwitchboard());
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sb.observer.resourceObserverJob();
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}
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/**
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* checks the resources and pauses crawls if necessary
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*/
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public void resourceObserverJob() {
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MemoryControl.setProperMbyte(getMinFreeMemory());
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this.normalizedDiskFree = getNormalizedDiskFree();
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this.normalizedDiskUsed = getNormalizedDiskUsed(true);
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this.normalizedMemoryFree = getNormalizedMemoryFree();
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// take actions if disk space is below AMPLE
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if (this.normalizedDiskFree != Space.AMPLE ||
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this.normalizedDiskUsed != Space.AMPLE ||
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this.normalizedMemoryFree != Space.AMPLE ) {
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String reason = "";
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if (this.normalizedDiskFree != Space.AMPLE) reason += " not enough disk space, " + getUsableSpace();
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if (this.normalizedDiskUsed != Space.AMPLE) reason += " too high disk usage, " + getNormalizedDiskUsed(true);
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if (this.normalizedMemoryFree != Space.AMPLE ) reason += " not enough memory space";
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if (!this.sb.crawlJobIsPaused(SwitchboardConstants.CRAWLJOB_LOCAL_CRAWL)) {
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log.info("pausing local crawls");
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this.sb.pauseCrawlJob(SwitchboardConstants.CRAWLJOB_LOCAL_CRAWL, "resource observer:" + reason);
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}
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if (!this.sb.crawlJobIsPaused(SwitchboardConstants.CRAWLJOB_REMOTE_TRIGGERED_CRAWL)) {
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log.info("pausing remote triggered crawls");
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this.sb.pauseCrawlJob(SwitchboardConstants.CRAWLJOB_REMOTE_TRIGGERED_CRAWL, "resource observer:" + reason);
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}
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if ((this.normalizedDiskFree == Space.EXHAUSTED || this.normalizedMemoryFree != Space.AMPLE) && this.sb.getConfigBool(SwitchboardConstants.INDEX_RECEIVE_ALLOW, false)) {
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log.info("disabling index receive");
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this.sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_ALLOW, false);
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this.sb.peers.mySeed().setFlagAcceptRemoteIndex(false);
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this.sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_AUTODISABLED, true);
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}
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}
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// shrink resources if space is EXHAUSTED
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if ((this.normalizedDiskFree == Space.EXHAUSTED && this.sb.getConfigBool(SwitchboardConstants.RESOURCE_DISK_FREE_AUTOREGULATE, false)) ||
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(this.normalizedDiskUsed == Space.EXHAUSTED && this.sb.getConfigBool(SwitchboardConstants.RESOURCE_DISK_USED_AUTOREGULATE, false))) {
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shrinkmethods: while (true /*this is not a loop, just a construct that we can leave with a break*/) {
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// delete old releases
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//if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// delete fetched snippets
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log.info("DISK SPACE EXHAUSTED - deleting snippet cache");
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sb.tables.clear(WorkTables.TABLE_SEARCH_FAILURE_NAME);
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// clear HTCACHE
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log.info("DISK SPACE EXHAUSTED - deleting HTCACHE");
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Cache.clear();
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// delete logs
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//if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// delete robots.txt
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log.info("DISK SPACE EXHAUSTED - deleting robots.txt database");
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try {sb.robots.clear();} catch (final IOException e) {}
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// delete news
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log.info("DISK SPACE EXHAUSTED - deleting News database");
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sb.peers.newsPool.clear(NewsPool.INCOMING_DB); sb.peers.newsPool.clear(NewsPool.PROCESSED_DB);
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sb.peers.newsPool.clear(NewsPool.OUTGOING_DB); sb.peers.newsPool.clear(NewsPool.PUBLISHED_DB);
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// clear citations
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if (sb.index.connectedCitation()) {
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log.info("DISK SPACE EXHAUSTED - deleting citations");
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try {sb.index.urlCitation().clear();} catch (final IOException e) {}
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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}
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// throw away crawl queues, if they are large
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if (sb.crawlQueues.coreCrawlJobSize() > 1000) {
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log.info("DISK SPACE EXHAUSTED - deleting crawl queues");
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sb.crawlQueues.clear();
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sb.crawlStacker.clear();
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ResultURLs.clearStacks();
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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}
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// cut away too large RWIs
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IndexCell<WordReference> termIndex = sb.index.termIndex();
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if (termIndex != null) try {
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int shrinkedReferences = termIndex.deleteOld(100, 10000);
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if (shrinkedReferences > 0) {
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log.info("DISK SPACE EXHAUSTED - shrinked " + shrinkedReferences + " RWI references to a maximum of 100");
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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}
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} catch (IOException e) {
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}
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// delete too old RWIs
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//if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// delete fulltext from large Solr documents
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//if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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// run a solr optimize
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this.sb.index.fulltext().commit(false);
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this.sb.index.fulltext().optimize(1);
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break shrinkmethods;
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/*
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// delete old Solr documents
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long day = 1000 * 60 * 60 * 24;
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for (int t = 12; t >= 1 ; t --) {
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log.info("DISK SPACE EXHAUSTED - deleting documents with loaddate > " + t + " months");
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this.sb.index.fulltext().deleteOldDocuments(t * 30 * day, true);
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this.sb.index.fulltext().commit(false);
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this.sb.index.fulltext().optimize(1);
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break shrinkmethods;
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}
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for (int t = 30; t > 3 ; t --) {
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log.info("DISK SPACE EXHAUSTED - deleting documents with loaddate > " + t + " days");
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this.sb.index.fulltext().deleteOldDocuments(t * day, true);
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this.sb.index.fulltext().commit(false);
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this.sb.index.fulltext().optimize(1);
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if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break shrinkmethods;
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}
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*/
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// WE SHOULD NEVER GET UP TO HERE...
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/*
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// delete ALL RWIs
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if (sb.index.termIndex() != null) {
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try {sb.index.termIndex().clear();} catch (final IOException e) {}
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//if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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}
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// delete full Solr
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try {sb.index.fulltext().clearLocalSolr();} catch (final IOException e) {}
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//if (getNormalizedDiskFree() == Space.AMPLE && getNormalizedDiskUsed(false) == Space.AMPLE) break;
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*/
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break; // DO NOT REMOVE THIS, the loop may run forever. It shall run only once.
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}
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this.normalizedDiskFree = getNormalizedDiskFree();
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this.normalizedDiskUsed = getNormalizedDiskUsed(false);
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this.normalizedMemoryFree = getNormalizedMemoryFree();
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}
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// normalize state if the resources are AMPLE
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if (this.normalizedDiskFree == Space.AMPLE && this.normalizedDiskUsed == Space.AMPLE && this.normalizedMemoryFree == Space.AMPLE ) {
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if(this.sb.getConfigBool(SwitchboardConstants.INDEX_RECEIVE_AUTODISABLED, false)) { // we were wrong!
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log.info("enabling index receive");
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this.sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_ALLOW, true);
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this.sb.peers.mySeed().setFlagAcceptRemoteIndex(true);
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this.sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_AUTODISABLED, false);
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}
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log.info("resources ok");
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}
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}
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private long sizeOfDirectory_lastCountTime = 0;
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private long sizeOfDirectory_lastCountValue = 0;
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public long getSizeOfDataPath(final boolean cached) {
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if (cached && System.currentTimeMillis() - this.sizeOfDirectory_lastCountTime < 600000) return this.sizeOfDirectory_lastCountValue;
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this.sizeOfDirectory_lastCountTime = System.currentTimeMillis();
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try {
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this.sizeOfDirectory_lastCountValue = FileUtils.sizeOfDirectory(this.path);
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} catch (Throwable e) {} // org.apache.commons.io.FileUtils.sizeOf calls sizes of files which are there temporary and may cause an exception. Thats a bug inside FileUtils
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return this.sizeOfDirectory_lastCountValue;
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}
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public long getUsableSpace() {
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return this.path.getUsableSpace();
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}
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private Space getNormalizedDiskUsed(final boolean cached) {
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final long currentUsed = getSizeOfDataPath(cached);
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//final long currentSpace = getUsableSpace(this.path);
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if (currentUsed < 1L) return Space.AMPLE;
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Space ret = Space.AMPLE;
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if (currentUsed > getMaxUsedDiskOvershot()) {
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log.warn("Volume " + this.path.toString() + ": used space (" + (currentUsed / 1024 / 1024) + " MB) is too high (> " + (getMaxUsedDiskOvershot() / 1024 / 1024) + " MB)");
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ret = Space.EXHAUSTED;
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return ret;
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}
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if (currentUsed > getMaxUsedDiskSteadystate()) {
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log.info("Volume " + this.path.toString() + ": used space (" + (currentUsed / 1024 / 1024) + " MB) is high, but nominal (> " + (getMaxUsedDiskSteadystate() / 1024 / 1024) + " MB)");
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ret = Space.NOMINAL;
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return ret;
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}
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return ret;
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}
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/**
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* returns the amount of disk space available
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* @return <ul>
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* <li><code>HIGH</code> if disk space is available</li>
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* <li><code>MEDIUM</code> if low disk space is available</li>
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* <li><code>LOW</code> if lower than hardlimit disk space is available</li>
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* </ul>
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*/
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private Space getNormalizedDiskFree() {
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final long currentSpace = getUsableSpace();
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//final long currentSpace = getUsableSpace(this.path);
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if (currentSpace < 1L) return Space.AMPLE; // this happens if the function does not work, like on Windows
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Space ret = Space.AMPLE;
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if (currentSpace < getMinFreeDiskUndershot()) {
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log.warn("Volume " + this.path.toString() + ": free space (" + (currentSpace / 1024 / 1024) + " MB) is too low (< " + (getMinFreeDiskSteadystate() / 1024 / 1024) + " MB)");
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ret = Space.EXHAUSTED;
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return ret;
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}
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if (currentSpace < getMinFreeDiskSteadystate()) {
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log.info("Volume " + this.path.toString() + ": free space (" + (currentSpace / 1024 / 1024) + " MB) is low, but nominal (< " + (getMinFreeDiskSteadystate() / 1024 / 1024) + " MB)");
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ret = Space.NOMINAL;
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return ret;
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}
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return ret;
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}
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private Space getNormalizedMemoryFree() {
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if(MemoryControl.properState()) return Space.AMPLE;
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// clear some caches - @all: are there more of these, we could clear here?
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this.sb.index.clearCaches();
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SearchEventCache.cleanupEvents(true);
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this.sb.trail.clear();
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Switchboard.urlBlacklist.clearblacklistCache();
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WordCache.clearCommonWords();
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Domains.clear();
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return MemoryControl.properState()? Space.AMPLE : Space.EXHAUSTED;
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}
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/**
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* @return <code>true</code> if disk space is available
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*/
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public boolean getDiskAvailable() {
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return this.normalizedDiskFree == Space.AMPLE;
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}
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/**
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* @return <code>true</code> if memory is available
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*/
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public boolean getMemoryAvailable() {
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return this.normalizedMemoryFree == Space.AMPLE;
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}
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/**
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* @return amount of space (bytes) that should be used in steady state
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*/
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public long getMaxUsedDiskSteadystate() {
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return this.sb.getConfigLong(SwitchboardConstants.RESOURCE_DISK_USED_MAX_STEADYSTATE, 524288) /* MB */ * 1024L * 1024L;
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}
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/**
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* @return amount of space (bytes) that should at least be kept free as hard limit; the limit when autoregulation to steady state should start
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*/
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public long getMaxUsedDiskOvershot() {
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return this.sb.getConfigLong(SwitchboardConstants.RESOURCE_DISK_USED_MAX_OVERSHOT, 1048576) /* MB */ * 1024L * 1024L;
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}
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/**
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* @return amount of space (bytes) that should be kept free as steady state
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*/
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public long getMinFreeDiskSteadystate() {
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return this.sb.getConfigLong(SwitchboardConstants.RESOURCE_DISK_FREE_MIN_STEADYSTATE, 2048) /* MB */ * 1024L * 1024L;
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}
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/**
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* @return amount of space (bytes) that should at least be kept free as hard limit; the limit when autoregulation to steady state should start
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*/
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public long getMinFreeDiskUndershot() {
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return this.sb.getConfigLong(SwitchboardConstants.RESOURCE_DISK_FREE_MIN_UNDERSHOT, 1024) /* MB */ * 1024L * 1024L;
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}
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/**
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* @return amount of space (MiB) that should at least be free
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*/
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public long getMinFreeMemory() {
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return this.sb.getConfigLong(SwitchboardConstants.MEMORY_ACCEPTDHT, 0);
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}
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}
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