Example #1
0
  public TpcbExample(
      File home,
      int accounts,
      int branches,
      int tellers,
      int history,
      int cachesize,
      boolean noSync)
      throws DatabaseException, FileNotFoundException {

    this.accounts = accounts;
    this.branches = branches;
    this.tellers = tellers;
    this.history = history;

    EnvironmentConfig config = new EnvironmentConfig();
    config.setErrorStream(System.err);
    config.setErrorPrefix(progname);
    config.setLockDetectMode(LockDetectMode.DEFAULT);
    config.setCacheSize(cachesize == 0 ? 4 * 1024 * 1024 : cachesize);
    config.setTxnNoSync(noSync);
    config.setLockDetectMode(LockDetectMode.DEFAULT);
    config.setAllowCreate(true);

    config.setInitializeCache(true);
    config.setTransactional(true);
    config.setInitializeLocking(true);
    config.setInitializeLogging(true);

    dbenv = new Environment(home, config);
  }
Example #2
0
  public int init(RepConfig config) throws DatabaseException {
    int ret = 0;
    appConfig = config;
    EnvironmentConfig envConfig = new EnvironmentConfig();
    envConfig.setErrorStream(System.err);
    envConfig.setErrorPrefix(RepConfig.progname);

    envConfig.setReplicationManagerLocalSite(appConfig.getThisHost());
    for (RepRemoteHost host = appConfig.getFirstOtherHost();
        host != null;
        host = appConfig.getNextOtherHost()) {
      envConfig.replicationManagerAddRemoteSite(host.getAddress(), host.isPeer());
    }
    if (appConfig.totalSites > 0) envConfig.setReplicationNumSites(appConfig.totalSites);

    /*
     * Set replication group election priority for this environment.
     * An election first selects the site with the most recent log
     * records as the new master.  If multiple sites have the most
     * recent log records, the site with the highest priority value
     * is selected as master.
     */
    envConfig.setReplicationPriority(appConfig.priority);

    envConfig.setCacheSize(RepConfig.CACHESIZE);
    envConfig.setTxnNoSync(true);

    envConfig.setEventHandler(new RepQuoteEventHandler());

    /*
     * Set the policy that determines how master and client sites
     * handle acknowledgement of replication messages needed for
     * permanent records.  The default policy of "quorum" requires only
     * a quorum of electable peers sufficient to ensure a permanent
     * record remains durable if an election is held.  The "all" option
     * requires all clients to acknowledge a permanent replication
     * message instead.
     */
    envConfig.setReplicationManagerAckPolicy(appConfig.ackPolicy);

    /*
     * Set the threshold for the minimum and maximum time the client
     * waits before requesting retransmission of a missing message.
     * Base these values on the performance and load characteristics
     * of the master and client host platforms as well as the round
     * trip message time.
     */
    envConfig.setReplicationRequestMin(20000);
    envConfig.setReplicationRequestMax(500000);

    /*
     * Configure deadlock detection to ensure that any deadlocks
     * are broken by having one of the conflicting lock requests
     * rejected. DB_LOCK_DEFAULT uses the lock policy specified
     * at environment creation time or DB_LOCK_RANDOM if none was
     * specified.
     */
    envConfig.setLockDetectMode(LockDetectMode.DEFAULT);

    envConfig.setAllowCreate(true);
    envConfig.setRunRecovery(true);
    envConfig.setThreaded(true);
    envConfig.setInitializeReplication(true);
    envConfig.setInitializeLocking(true);
    envConfig.setInitializeLogging(true);
    envConfig.setInitializeCache(true);
    envConfig.setTransactional(true);
    envConfig.setVerboseReplication(appConfig.verbose);
    try {
      dbenv = new RepQuoteEnvironment(appConfig.getHome(), envConfig);
    } catch (FileNotFoundException e) {
      System.err.println("FileNotFound exception: " + e);
      System.err.println("Ensure that the environment directory is pre-created.");
      ret = 1;
    }

    if (appConfig.bulk) dbenv.setReplicationConfig(ReplicationConfig.BULK, true);

    /*
     * Configure heartbeat timeouts so that repmgr monitors the
     * health of the TCP connection.  Master sites broadcast a heartbeat
     * at the frequency specified by the DB_REP_HEARTBEAT_SEND timeout.
     * Client sites wait for message activity the length of the
     * DB_REP_HEARTBEAT_MONITOR timeout before concluding that the
     * connection to the master is lost.  The DB_REP_HEARTBEAT_MONITOR
     * timeout should be longer than the DB_REP_HEARTBEAT_SEND timeout.
     */
    dbenv.setReplicationTimeout(ReplicationTimeoutType.HEARTBEAT_SEND, 5000000);
    dbenv.setReplicationTimeout(ReplicationTimeoutType.HEARTBEAT_MONITOR, 10000000);

    /* The following base replication features may also be useful to your
     * application. See Berkeley DB documentation for more details.
     *   - Master leases: Provide stricter consistency for data reads
     *     on a master site.
     *   - Timeouts: Customize the amount of time Berkeley DB waits
     *     for such things as an election to be concluded or a master
     *     lease to be granted.
     *   - Delayed client synchronization: Manage the master site's
     *     resources by spreading out resource-intensive client
     *     synchronizations.
     *   - Blocked client operations: Return immediately with an error
     *     instead of waiting indefinitely if a client operation is
     *     blocked by an ongoing client synchronization.
     *
     * The following repmgr features may also be useful to your
     * application.  See Berkeley DB documentation for more details.
     *  - Two-site strict majority rule - In a two-site replication
     *    group, require both sites to be available to elect a new
     *    master.
     *  - Timeouts - Customize the amount of time repmgr waits
     *    for such things as waiting for acknowledgements or attempting
     *    to reconnect to other sites.
     *  - Site list - return a list of sites currently known to repmgr.
     */

    /* Start checkpoint and log archive support threads. */
    ckpThr = new CheckpointThread(dbenv);
    ckpThr.start();
    lgaThr = new LogArchiveThread(dbenv, envConfig);
    lgaThr.start();

    /* Start replication manager. */
    dbenv.replicationManagerStart(3, appConfig.startPolicy);

    return ret;
  }
Example #3
0
  public void run() {
    String homedirName = baseDirName + threadNumber;
    TestUtils.removeDir(homedirName);

    try {
      homedir = new File(homedirName);
      homedir.mkdir();
    } catch (Exception e) {
      TestUtils.DEBUGOUT(
          2, "Warning: initialization had a problem creating a clean directory.\n" + e);
    }
    try {
      homedir = new File(homedirName);
    } catch (NullPointerException npe) {
      // can't really happen :)
    }

    TestUtils.DEBUGOUT(1, "Creating worker: " + threadNumber);

    envConfig = new EnvironmentConfig();
    envConfig.setErrorStream(TestUtils.getErrorStream());
    envConfig.setErrorPrefix("RepmgrElectionTest test(" + threadNumber + ")");
    envConfig.setAllowCreate(true);
    envConfig.setRunRecovery(true);
    envConfig.setThreaded(true);
    envConfig.setInitializeLocking(true);
    envConfig.setInitializeLogging(true);
    envConfig.setInitializeCache(true);
    envConfig.setTransactional(true);
    envConfig.setTxnNoSync(true);
    envConfig.setInitializeReplication(true);
    envConfig.setVerboseReplication(false);

    ReplicationManagerSiteConfig localConfig =
        new ReplicationManagerSiteConfig(address, basePort + threadNumber);
    localConfig.setLocalSite(true);
    envConfig.addReplicationManagerSite(localConfig);

    envConfig.setReplicationPriority(priorities[threadNumber]);
    envConfig.setEventHandler(this);
    envConfig.setReplicationManagerAckPolicy(ReplicationManagerAckPolicy.ALL);

    if (masterThreadIndex >= 0) {
      // If we already have the master, then set it as the bootstrap helper,
      // otherwise, set local site as new master.
      ReplicationManagerSiteConfig remoteConfig =
          new ReplicationManagerSiteConfig(address, basePort + masterThreadIndex);
      remoteConfig.setBootstrapHelper(true);
      envConfig.addReplicationManagerSite(remoteConfig);
    }

    try {
      dbenv = new Environment(homedir, envConfig);

    } catch (FileNotFoundException e) {
      fail("Unexpected FNFE in standard environment creation." + e);
    } catch (DatabaseException dbe) {
      fail("Unexpected database exception came from environment create." + dbe);
    }

    try {
      // If we do not have master, then set local site as new master.
      if (masterThreadIndex == -1)
        dbenv.replicationManagerStart(NUM_WORKER_THREADS, ReplicationManagerStartPolicy.REP_MASTER);
      else
        dbenv.replicationManagerStart(NUM_WORKER_THREADS, ReplicationManagerStartPolicy.REP_CLIENT);
    } catch (DatabaseException dbe) {
      fail("Unexpected database exception came from replicationManagerStart." + dbe);
    }

    TestUtils.DEBUGOUT(1, "Started replication site: " + threadNumber);
    lastSiteStarted = true;

    try {
      java.lang.Thread.sleep(1000 * (1 + threadNumber));
    } catch (InterruptedException ie) {
    }

    if (masterThreadIndex != -1) {
      // Wait for "Start-up done" for each client, then add next client.
      ReplicationStats rs = null;
      int i = 0;
      do {
        try {
          java.lang.Thread.sleep(2000);
        } catch (InterruptedException e) {
        }

        try {
          rs = dbenv.getReplicationStats(StatsConfig.DEFAULT);
        } catch (DatabaseException dbe) {
          dbe.printStackTrace();
          fail("Unexpected database exception came from getReplicationStats." + dbe);
        }
      } while (!rs.getStartupComplete() && i++ < maxLoopWait);
      assertTrue(rs.getStartupComplete());
    }
  }