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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002,2010 Oracle. All rights reserved.
*
* $Id: LRUTest.java,v 1.3.2.4 2010/03/26 13:23:55 mark Exp $
*/
package com.sleepycat.je.evictor;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.Arrays;
import junit.framework.TestCase;
import com.sleepycat.bind.tuple.IntegerBinding;
import com.sleepycat.je.CacheMode;
import com.sleepycat.je.Cursor;
import com.sleepycat.je.Database;
import com.sleepycat.je.DatabaseConfig;
import com.sleepycat.je.DatabaseEntry;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.DbInternal;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.OperationStatus;
import com.sleepycat.je.dbi.INList;
import com.sleepycat.je.dbi.DatabaseImpl;
import com.sleepycat.je.tree.IN;
import com.sleepycat.je.util.TestUtils;
/**
* Tests that the LRU algorithm is accurate.
*/
public class LRUTest extends TestCase {
private static final int N_DBS = 5;
private static final int ONE_MB = 1 << 20;
private static final int DB_CACHE_SIZE = ONE_MB;
private static final int ENV_CACHE_SIZE = N_DBS * DB_CACHE_SIZE;
private static final int MIN_DATA_SIZE = 50 * 1024;
private static final int LRU_ACCURACY_PCT = 60;
private static final int ENTRY_DATA_SIZE = 500;
private File envHome;
private Environment env;
private Database[] dbs = new Database[N_DBS];
public LRUTest() {
envHome = new File(System.getProperty(TestUtils.DEST_DIR));
}
public void setUp()
throws IOException {
TestUtils.removeLogFiles("Setup", envHome, false);
}
public void tearDown() {
if (env != null) {
try {
env.close();
} catch (Throwable e) {
System.out.println("tearDown: " + e);
}
}
try {
TestUtils.removeLogFiles("TearDown", envHome, false);
} catch (Throwable e) {
System.out.println("tearDown: " + e);
}
envHome = null;
env = null;
dbs = null;
}
private void open()
throws DatabaseException {
EnvironmentConfig envConfig = new EnvironmentConfig();
envConfig.setAllowCreate(true);
envConfig.setCacheSize(ENV_CACHE_SIZE);
envConfig.setConfigParam("je.tree.minMemory",
String.valueOf(MIN_DATA_SIZE));
envConfig.setConfigParam("je.env.runCleaner", "false");
envConfig.setConfigParam("je.env.runCheckpointer", "false");
envConfig.setConfigParam("je.env.runINCompressor", "false");
env = new Environment(envHome, envConfig);
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
for (int i = 0; i < dbs.length; i += 1) {
dbs[i] = env.openDatabase(null, "foo-" + i, dbConfig);
}
}
private void close()
throws DatabaseException {
for (int i = 0; i < N_DBS; i += 1) {
if (dbs[i] != null) {
dbs[i].close();
dbs[i] = null;
}
}
if (env != null) {
env.close();
env = null;
}
}
public void testBaseline()
throws DatabaseException {
open();
for (int i = 0; i < N_DBS; i += 1) {
write(dbs[i], DB_CACHE_SIZE);
}
long[] results = new long[100];
for (int repeat = 0; repeat < 100; repeat += 1) {
/* Read all DBs evenly. */
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
boolean done = false;
for (int i = 0; !done; i += 1) {
IntegerBinding.intToEntry(i, key);
for (int j = 0; j < N_DBS; j += 1) {
if (dbs[j].get(null, key, data, null) !=
OperationStatus.SUCCESS) {
done = true;
}
}
}
/*
* Check that each DB uses approximately equal portions of the
* cache.
*/
StringBuffer buf = new StringBuffer();
long low = Long.MAX_VALUE;
long high = 0;
for (int i = 0; i < N_DBS; i += 1) {
long val = getDatabaseCacheBytes(dbs[i]);
buf.append(" db=" + i + " bytes=" + val);
if (low > val) {
low = val;
}
if (high < val) {
high = val;
}
}
long pct = (low * 100) / high;
assertTrue("failed with pct=" + pct + buf,
pct >= LRU_ACCURACY_PCT);
results[repeat] = pct;
}
Arrays.sort(results);
//System.out.println(Arrays.toString(results));
close();
}
public void testCacheMode_KEEP_HOT()
throws DatabaseException {
open();
for (int i = 0; i < N_DBS; i += 1) {
write(dbs[i], DB_CACHE_SIZE);
}
long[] results = new long[100];
for (int repeat = 0; repeat < 100; repeat += 1) {
/* Read all DBs evenly. */
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
boolean done = false;
Cursor[] cursors = new Cursor[N_DBS];
for (int j = 0; j < N_DBS; j++) {
cursors[j] = dbs[j].openCursor(null, null);
}
cursors[0].setCacheMode(CacheMode.KEEP_HOT);
cursors[1].setCacheMode(CacheMode.KEEP_HOT);
cursors[2].setCacheMode(CacheMode.DEFAULT);
cursors[3].setCacheMode(CacheMode.DEFAULT);
cursors[4].setCacheMode(CacheMode.DEFAULT);
for (int i = 0; !done; i += 1) {
IntegerBinding.intToEntry(i, key);
for (int j = 0; j < N_DBS; j += 1) {
if (cursors[j].getSearchKey(key, data, null) !=
OperationStatus.SUCCESS) {
done = true;
}
}
}
for (int j = 0; j < N_DBS; j++) {
cursors[j].close();
}
/*
* Check that db[0] and db[1] use more than the other three.
*/
StringBuffer buf = new StringBuffer();
long[] dbBytes = new long[N_DBS];
for (int i = 0; i < N_DBS; i += 1) {
dbBytes[i] = getDatabaseCacheBytes(dbs[i]);
buf.append(" db=" + i + " bytes=" + dbBytes[i]);
}
assertTrue(dbBytes[0] > dbBytes[2]);
assertTrue(dbBytes[0] > dbBytes[3]);
assertTrue(dbBytes[0] > dbBytes[4]);
assertTrue(dbBytes[1] > dbBytes[2]);
assertTrue(dbBytes[1] > dbBytes[3]);
assertTrue(dbBytes[1] > dbBytes[4]);
}
Arrays.sort(results);
//System.out.println(Arrays.toString(results));
close();
}
public void testCacheMode_UNCHANGED()
throws DatabaseException {
open();
for (int i = 0; i < N_DBS; i += 1) {
write(dbs[i], DB_CACHE_SIZE);
}
long[] results = new long[100];
for (int repeat = 0; repeat < 100; repeat += 1) {
/* Read all DBs evenly. */
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
boolean done = false;
Cursor[] cursors = new Cursor[N_DBS];
for (int j = 0; j < N_DBS; j++) {
cursors[j] = dbs[j].openCursor(null, null);
}
cursors[0].setCacheMode(CacheMode.UNCHANGED);
cursors[1].setCacheMode(CacheMode.UNCHANGED);
cursors[2].setCacheMode(CacheMode.DEFAULT);
cursors[3].setCacheMode(CacheMode.DEFAULT);
cursors[4].setCacheMode(CacheMode.DEFAULT);
for (int i = 0; !done; i += 1) {
IntegerBinding.intToEntry(i, key);
for (int j = 0; j < N_DBS; j += 1) {
if (cursors[j].getSearchKey(key, data, null) !=
OperationStatus.SUCCESS) {
done = true;
}
}
}
for (int j = 0; j < N_DBS; j++) {
cursors[j].close();
}
/*
* Check that db[0] and db[1] use more than the other three.
*/
StringBuffer buf = new StringBuffer();
long[] dbBytes = new long[N_DBS];
for (int i = 0; i < N_DBS; i += 1) {
dbBytes[i] = getDatabaseCacheBytes(dbs[i]);
buf.append(" db=" + i + " bytes=" + dbBytes[i]);
}
assertTrue(dbBytes[0] < dbBytes[2]);
assertTrue(dbBytes[0] < dbBytes[3]);
assertTrue(dbBytes[0] < dbBytes[4]);
assertTrue(dbBytes[1] < dbBytes[2]);
assertTrue(dbBytes[1] < dbBytes[3]);
assertTrue(dbBytes[1] < dbBytes[4]);
//System.out.println(buf);
}
Arrays.sort(results);
//System.out.println(Arrays.toString(results));
close();
}
public void testCacheMode_MAKE_COLD()
throws DatabaseException {
open();
for (int i = 0; i < N_DBS; i += 1) {
write(dbs[i], DB_CACHE_SIZE);
}
long[] results = new long[100];
for (int repeat = 0; repeat < 100; repeat += 1) {
/* Read all DBs evenly. */
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
boolean done = false;
Cursor[] cursors = new Cursor[N_DBS];
for (int j = 0; j < N_DBS; j++) {
cursors[j] = dbs[j].openCursor(null, null);
}
cursors[0].setCacheMode(CacheMode.MAKE_COLD);
cursors[1].setCacheMode(CacheMode.MAKE_COLD);
cursors[2].setCacheMode(CacheMode.UNCHANGED);
cursors[3].setCacheMode(CacheMode.UNCHANGED);
cursors[4].setCacheMode(CacheMode.UNCHANGED);
for (int i = 0; !done; i += 1) {
IntegerBinding.intToEntry(i, key);
for (int j = 0; j < N_DBS; j += 1) {
if (cursors[j].getSearchKey(key, data, null) !=
OperationStatus.SUCCESS) {
done = true;
}
}
}
for (int j = 0; j < N_DBS; j++) {
cursors[j].close();
}
/*
* Check that db[0] and db[1] use more than the other three.
*/
StringBuffer buf = new StringBuffer();
long[] dbBytes = new long[N_DBS];
for (int i = 0; i < N_DBS; i += 1) {
dbBytes[i] = getDatabaseCacheBytes(dbs[i]);
buf.append(" db=" + i + " bytes=" + dbBytes[i]);
}
assertTrue(dbBytes[0] < dbBytes[2]);
assertTrue(dbBytes[0] < dbBytes[3]);
assertTrue(dbBytes[0] < dbBytes[4]);
assertTrue(dbBytes[1] < dbBytes[2]);
assertTrue(dbBytes[1] < dbBytes[3]);
assertTrue(dbBytes[1] < dbBytes[4]);
//System.out.println(buf);
}
Arrays.sort(results);
//System.out.println(Arrays.toString(results));
close();
}
public void testCacheMode_EVICT_LN()
throws DatabaseException {
open();
for (int i = 0; i < N_DBS; i += 1) {
write(dbs[i], DB_CACHE_SIZE);
}
long[] results = new long[100];
for (int repeat = 0; repeat < 100; repeat += 1) {
/* Read all DBs evenly. */
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry();
boolean done = false;
Cursor[] cursors = new Cursor[N_DBS];
for (int j = 0; j < N_DBS; j++) {
cursors[j] = dbs[j].openCursor(null, null);
}
cursors[0].setCacheMode(CacheMode.EVICT_LN);
cursors[1].setCacheMode(CacheMode.EVICT_LN);
cursors[2].setCacheMode(CacheMode.MAKE_COLD);
cursors[3].setCacheMode(CacheMode.MAKE_COLD);
cursors[4].setCacheMode(CacheMode.MAKE_COLD);
for (int i = 0; !done; i += 1) {
IntegerBinding.intToEntry(i, key);
for (int j = 0; j < N_DBS; j += 1) {
if (cursors[j].getSearchKey(key, data, null) !=
OperationStatus.SUCCESS) {
done = true;
}
}
}
for (int j = 0; j < N_DBS; j++) {
cursors[j].close();
}
/*
* Check that db[0] and db[1] use more than the other three.
*/
StringBuffer buf = new StringBuffer();
long[] dbBytes = new long[N_DBS];
for (int i = 0; i < N_DBS; i += 1) {
dbBytes[i] = getDatabaseCacheBytes(dbs[i]);
buf.append(" db=" + i + " bytes=" + dbBytes[i]);
}
assertTrue(dbBytes[0] < dbBytes[2]);
assertTrue(dbBytes[0] < dbBytes[3]);
assertTrue(dbBytes[0] < dbBytes[4]);
assertTrue(dbBytes[1] < dbBytes[2]);
assertTrue(dbBytes[1] < dbBytes[3]);
assertTrue(dbBytes[1] < dbBytes[4]);
//System.out.println(buf);
}
Arrays.sort(results);
//System.out.println(Arrays.toString(results));
close();
}
private long getDatabaseCacheBytes(Database db)
throws DatabaseException {
long total = 0;
DatabaseImpl dbImpl = DbInternal.dbGetDatabaseImpl(db);
INList ins = dbImpl.getDbEnvironment().getInMemoryINs();
Iterator i = ins.iterator();
while (i.hasNext()) {
IN in = (IN) i.next();
if (in.getDatabase() == dbImpl) {
total += in.getInMemorySize();
}
}
return total;
}
/**
* Writes enough records in the given envIndex environment to cause at
* least minSizeToWrite bytes to be used in the cache.
*/
private int write(Database db, int minSizeToWrite)
throws DatabaseException {
DatabaseEntry key = new DatabaseEntry();
DatabaseEntry data = new DatabaseEntry(new byte[ENTRY_DATA_SIZE]);
int i;
for (i = 0; i < minSizeToWrite / ENTRY_DATA_SIZE; i += 1) {
IntegerBinding.intToEntry(i, key);
db.put(null, key, data);
}
return i;
}
}
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