Examples of org.apache.hadoop.hbase.client.HBaseAdmin.move()

Class org.apache.hadoop.hbase.client.HBaseAdmin

Examples of org.apache.hadoop.hbase.client.HBaseAdmin.move()

org.apache.hadoop.hbase.client.HBaseAdmin.move()
Move the region r to dest. @param encodedRegionName The encoded region name; i.e. the hash that makesup the region name suffix: e.g. if regionname is TestTable,0094429456,1289497600452.527db22f95c8a9e0116f0cc13c680396., then the encoded region name is: 527db22f95c8a9e0116f0cc13c680396. @param destServerName The servername of the destination regionserver. Ifpassed the empty byte array we'll assign to a random server. A server name is made of host, port and startcode. Here is an example: host187.example.com,60020,1289493121758 @throws UnknownRegionException Thrown if we can't find a region namedencodedRegionName @throws ZooKeeperConnectionException @throws MasterNotRunningException


      // Put data: r2->v2
      putDataAndVerify(table, "r2", FAMILY, "v2", 2);


      // Move region to origin server
      hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
          Bytes.toBytes(originServer.getServerName().getServerName()));
      do {
        Thread.sleep(1);
      } while (cluster.getServerWith(regionInfo.getRegionName()) == targetServerNum);

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    LOG.info("Moving " + victimRegions.size() + " regions from " + fromServers.size()
        + " servers to " + toServers.size() + " different servers");
    HBaseAdmin admin = this.context.getHBaseIntegrationTestingUtility().getHBaseAdmin();
    for (byte[] victimRegion : victimRegions) {
      int targetIx = RandomUtils.nextInt(toServers.size());
      admin.move(victimRegion, Bytes.toBytes(toServers.get(targetIx).getServerName()));
    }
  }


  protected void forceBalancer() throws Exception {
    HBaseAdmin admin = this.context.getHBaseIntegrationTestingUtility().getHBaseAdmin();

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        Random random = new Random();
        for (HRegionInfo regionInfo:regions) {
          try {
            byte[] destServerName =
              Bytes.toBytes(servers[random.nextInt(servers.length)].getServerName());
            admin.move(regionInfo.getRegionName(), destServerName);
          } catch (Exception e) {
            LOG.debug("Error moving region", e);
          }
        }
        Thread.sleep(sleepTime);

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      LOG.info("Moving " + victimRegions.size() + " regions from " + victimServers.size()
          + " servers to " + targetServers.size() + " different servers");
      HBaseAdmin admin = this.context.getHaseIntegrationTestingUtility().getHBaseAdmin();
      for (byte[] victimRegion : victimRegions) {
        int targetIx = random.nextInt(targetServers.size());
        admin.move(victimRegion, targetServers.get(targetIx));
      }
    }
  }


  public static class ForceBalancerAction extends Action {

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      int originServerNum = cluster.getServerWith(regionInfo.getRegionName());
      HRegionServer originServer = cluster.getRegionServer(originServerNum);
      int targetServerNum = (originServerNum + 1) % NUM_RS;
      HRegionServer targetServer = cluster.getRegionServer(targetServerNum);
      assertFalse(originServer.equals(targetServer));
      hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
          Bytes.toBytes(targetServer.getServerName().getServerName()));
      do {
        Thread.sleep(10);
      } while (cluster.getServerWith(regionInfo.getRegionName()) == originServerNum ||
          cluster.getMaster().getAssignmentManager().getRegionServerOfRegion(regionInfo) == null);

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      // Put data: r2->v2
      putDataAndVerify(table, "r2", FAMILY, "v2", 2);


      // Move region to origin server
      hbaseAdmin.move(regionInfo.getEncodedNameAsBytes(),
          Bytes.toBytes(originServer.getServerName().getServerName()));
      do {
        Thread.sleep(1);
      } while (cluster.getServerWith(regionInfo.getRegionName()) == targetServerNum);

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      final Map.Entry<HRegionInfo, ServerName> firstRegion = regions.entrySet()
          .iterator().next();


      PrivilegedExceptionAction moveAction = new PrivilegedExceptionAction() {
        public Object run() throws Exception {
          admin.move(firstRegion.getKey().getEncodedNameAsBytes(),
              Bytes.toBytes(newRs.getServerName().getServerName()));
          return null;
        }
      };
      SUPERUSER.runAs(moveAction);

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