Merge whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-new-maint

into  whalegate.ndb.mysql.com:/home/tomas/mysql-5.1-single-user


BitKeeper/etc/ignore:
  auto-union

.bzrignore

@@ -2641,6 +2641,16 @@ storage/ndb/lib/libNEWTON_BASICTEST_COMMON.so
 storage/ndb/lib/libREP_API.so
 storage/ndb/lib/libndbclient.so
 storage/ndb/lib/libndbclient_extra.so
+storage/ndb/ndbapi-examples/mgmapi_logevent/mgmapi_logevent
+storage/ndb/ndbapi-examples/mgmapi_logevent2/mgmapi_logevent2
+storage/ndb/ndbapi-examples/ndbapi_async/ndbapi_async
+storage/ndb/ndbapi-examples/ndbapi_async1/ndbapi_async1
+storage/ndb/ndbapi-examples/ndbapi_event/ndbapi_event
+storage/ndb/ndbapi-examples/ndbapi_retries/ndbapi_retries
+storage/ndb/ndbapi-examples/ndbapi_scan/ndbapi_scan
+storage/ndb/ndbapi-examples/ndbapi_simple/ndbapi_simple
+storage/ndb/ndbapi-examples/ndbapi_simple_dual/ndbapi_simple_dual
+storage/ndb/ndbapi-examples/ndbapi_simple_index/ndbapi_simple_index
 storage/ndb/src/common/debugger/libtrace.dsp
 storage/ndb/src/common/debugger/signaldata/libsignaldataprint.dsp
 storage/ndb/src/common/logger/liblogger.dsp
@@ -2718,6 +2728,8 @@ storage/ndb/test/ndbapi/testDataBuffers
 storage/ndb/test/ndbapi/testDeadlock
 storage/ndb/test/ndbapi/testDict
 storage/ndb/test/ndbapi/testIndex
+storage/ndb/test/ndbapi/testIndexStat
+storage/ndb/test/ndbapi/testInterpreter
 storage/ndb/test/ndbapi/testLcp
 storage/ndb/test/ndbapi/testMgm
 storage/ndb/test/ndbapi/testNdbApi
@@ -2753,6 +2765,7 @@ storage/ndb/test/tools/hugoScanRead
 storage/ndb/test/tools/hugoScanUpdate
 storage/ndb/test/tools/listen_event
 storage/ndb/test/tools/ndb_cpcc
+storage/ndb/test/tools/rep_latency
 storage/ndb/test/tools/restart
 storage/ndb/test/tools/verify_index
 storage/ndb/tools/ndb_config

libmysqld/Makefile.am

@@ -45,7 +45,7 @@ libmysqlsources =	errmsg.c get_password.c libmysql.c client.c pack.c \
 noinst_HEADERS =	embedded_priv.h emb_qcache.h
 
 sqlsources = derror.cc field.cc field_conv.cc strfunc.cc filesort.cc \
-	     ha_ndbcluster.cc \
+	     ha_ndbcluster.cc ha_ndbcluster_cond.cc \
 	ha_ndbcluster_binlog.cc ha_partition.cc \
 	handler.cc sql_handler.cc \
 	hostname.cc init.cc password.c \
@@ -107,6 +107,9 @@ endif
 ha_ndbcluster.o:ha_ndbcluster.cc
 		$(CXXCOMPILE) @ndbcluster_includes@ $(LM_CFLAGS) -c $<
 
+ha_ndbcluster_cond.o:ha_ndbcluster_cond.cc
+		$(CXXCOMPILE) @ndbcluster_includes@ $(LM_CFLAGS) -c $<
+
 ha_ndbcluster_binlog.o: ha_ndbcluster_binlog.cc
 		$(CXXCOMPILE) @ndbcluster_includes@ $(LM_CFLAGS) -c $<
 

sql/Makefile.am

@@ -48,9 +48,9 @@ noinst_HEADERS =	item.h item_func.h item_sum.h item_cmpfunc.h \
 			procedure.h sql_class.h sql_lex.h sql_list.h \
 			sql_map.h sql_string.h unireg.h \
 			sql_error.h field.h handler.h mysqld_suffix.h \
-			ha_partition.h \
-			ha_ndbcluster.h ha_ndbcluster_binlog.h \
-			ha_ndbcluster_tables.h rpl_constants.h \
+			ha_ndbcluster.h ha_ndbcluster_cond.h \
+			ha_ndbcluster_binlog.h ha_ndbcluster_tables.h 
+			ha_partition.h rpl_constants.h \
 			opt_range.h protocol.h rpl_tblmap.h rpl_utility.h \
 			log.h sql_show.h rpl_rli.h rpl_mi.h \
 			sql_select.h structs.h table.h sql_udf.h hash_filo.h \
@@ -92,8 +92,8 @@ mysqld_SOURCES =	sql_lex.cc sql_handler.cc sql_partition.cc \
 			log_event_old.cc rpl_record_old.cc \
 			discover.cc time.cc opt_range.cc opt_sum.cc \
 		   	records.cc filesort.cc handler.cc \
-			ha_partition.cc \
-                        ha_ndbcluster.cc ha_ndbcluster_binlog.cc \
+                        ha_ndbcluster.cc ha_ndbcluster_cond.cc \
+		        ha_ndbcluster_binlog.cc ha_partition.cc \
 			sql_db.cc sql_table.cc sql_rename.cc sql_crypt.cc \
 			sql_load.cc mf_iocache.cc field_conv.cc sql_show.cc \
 			sql_udf.cc sql_analyse.cc sql_analyse.h sql_cache.cc \
@@ -156,10 +156,13 @@ lex_hash.h:	gen_lex_hash.cc lex.h
 		./gen_lex_hash$(EXEEXT) > $@-t
 		$(MV) $@-t $@
 
-# the following three should eventually be moved out of this directory
+# the following four should eventually be moved out of this directory
 ha_ndbcluster.o:ha_ndbcluster.cc ha_ndbcluster.h
 		$(CXXCOMPILE) @ndbcluster_includes@ $(LM_CFLAGS) -c $<
 
+ha_ndbcluster_cond.o:ha_ndbcluster_cond.cc ha_ndbcluster_cond.h
+		$(CXXCOMPILE) @ndbcluster_includes@ $(LM_CFLAGS) -c $<
+
 ha_ndbcluster_binlog.o:ha_ndbcluster_binlog.cc ha_ndbcluster_binlog.h
 		$(CXXCOMPILE) @ndbcluster_includes@ $(LM_CFLAGS) -c $<
 

storage/ndb/src/kernel/blocks/dbtup/DbtupExecQuery.cpp

@@ -2917,11 +2917,10 @@ Dbtup::nr_update_gci(Uint32 fragPtrI, const Local_key* key, Uint32 gci)
     int ret;
     if (tablePtr.p->m_attributes[MM].m_no_of_varsize)
     {
-      tablePtr.p->m_offsets[MM].m_fix_header_size += 
-	Tuple_header::HeaderSize+1;
+      const Uint32 XXX = Tuple_header::HeaderSize+Var_part_ref::SZ32;
+      tablePtr.p->m_offsets[MM].m_fix_header_size += XXX;
       ret = alloc_page(tablePtr.p, fragPtr.p, &page_ptr, tmp.m_page_no);
-      tablePtr.p->m_offsets[MM].m_fix_header_size -= 
-	Tuple_header::HeaderSize+1;
+      tablePtr.p->m_offsets[MM].m_fix_header_size -= XXX;
     } 
     else
     {

storage/ndb/test/include/NdbRestarter.hpp

@@ -27,15 +27,34 @@ public:
 
   int getDbNodeId(int _i);
 
+  enum RestartFlags {
+    NRRF_INITIAL = 0x1,
+    NRRF_NOSTART = 0x2,
+    NRRF_ABORT   = 0x4
+  };
+
   int restartOneDbNode(int _nodeId, 
 		       bool initial = false, 
 		       bool nostart = false, 
 		       bool abort = false);
 
+  int restartOneDbNode2(int _nodeId, Uint32 flags){
+    return restartOneDbNode(_nodeId,
+                            flags & NRRF_INITIAL,
+                            flags & NRRF_NOSTART,
+                            flags & NRRF_ABORT);
+  }
+
   int restartAll(bool initial = false, 
 		 bool nostart = false, 
 		 bool abort = false);
   
+  int restartAll2(Uint32 flags){
+    return restartAll(flags & NRRF_INITIAL,
+                      flags & NRRF_NOSTART,
+                      flags & NRRF_ABORT);
+  }
+  
   int startAll();
   int startNodes(const int * _nodes, int _num_nodes);
   int waitClusterStarted(unsigned int _timeout = 120);

storage/ndb/test/ndbapi/testNodeRestart.cpp

@@ -1567,6 +1567,72 @@ runBug27466(NDBT_Context* ctx, NDBT_Step* step)
   return NDBT_OK;
 }
 
+int
+runBug28023(NDBT_Context* ctx, NDBT_Step* step)
+{
+  int result = NDBT_OK;
+  int loops = ctx->getNumLoops();
+  int records = ctx->getNumRecords();
+  Ndb* pNdb = GETNDB(step);
+  NdbRestarter res;
+
+  if (res.getNumDbNodes() < 2)
+  {
+    return NDBT_OK;
+  }
+
+
+  HugoTransactions hugoTrans(*ctx->getTab());
+  if (hugoTrans.loadTable(pNdb, records) != 0){
+    return NDBT_FAILED;
+  }
+  
+  if (hugoTrans.clearTable(pNdb, records) != 0)
+  {
+    return NDBT_FAILED;
+  }
+
+  for (Uint32 i = 0; i<loops; i++)
+  {
+    int node1 = res.getDbNodeId(rand() % res.getNumDbNodes());
+    
+    if (res.restartOneDbNode2(node1, 
+                              NdbRestarter::NRRF_ABORT |
+                              NdbRestarter::NRRF_NOSTART))
+      return NDBT_FAILED;
+    
+    if (res.waitNodesNoStart(&node1, 1))
+      return NDBT_FAILED;
+
+    if (hugoTrans.loadTable(pNdb, records) != 0){
+      return NDBT_FAILED;
+    }
+    
+    if (hugoTrans.clearTable(pNdb, records) != 0)
+    {
+      return NDBT_FAILED;
+    }
+    
+    res.startNodes(&node1, 1);
+    if (res.waitClusterStarted())
+      return NDBT_FAILED;
+
+    if (hugoTrans.loadTable(pNdb, records) != 0){
+      return NDBT_FAILED;
+    }
+    
+    if (hugoTrans.scanUpdateRecords(pNdb, records) != 0)
+      return NDBT_FAILED;
+
+    if (hugoTrans.clearTable(pNdb, records) != 0)
+    {
+      return NDBT_FAILED;
+    }
+  }
+  
+  return NDBT_OK;
+}
+
 NDBT_TESTSUITE(testNodeRestart);
 TESTCASE("NoLoad", 
 	 "Test that one node at a time can be stopped and then restarted "\
@@ -1924,6 +1990,9 @@ TESTCASE("Bug27283", ""){
 TESTCASE("Bug27466", ""){
   INITIALIZER(runBug27466);
 }
+TESTCASE("Bug28023", ""){
+  INITIALIZER(runBug28023);
+}
 NDBT_TESTSUITE_END(testNodeRestart);
 
 int main(int argc, const char** argv){

storage/ndb/test/run-test/daily-basic-tests.txt

@@ -549,6 +549,10 @@ max-time: 1000
 cmd: testNodeRestart
 args: -n Bug26481 T1
 
+max-time: 1000
+cmd: testNodeRestart
+args: -n Bug28023 T7 D2
+
 #
 # DICT TESTS
 max-time: 1500

storage/ndb/test/src/HugoTransactions.cpp

@@ -1146,7 +1146,7 @@ HugoTransactions::pkInterpretedUpdateRecords(Ndb* pNdb,
     }
 
     // PKs
-    if (equalForRow(pOp, r) != 0)
+    if (equalForRow(pUpdOp, r) != 0)
     {
       closeTransaction(pNdb);
       return NDBT_FAILED;
@@ -1714,7 +1714,7 @@ HugoTransactions::indexUpdateRecords(Ndb* pNdb,
       
       if(!ordered)
       {
-        if (equalForRow(pOp, r+b) != 0)
+        if (equalForRow(pUpdOp, r+b) != 0)
         {
           closeTransaction(pNdb);
           return NDBT_FAILED;

storage/ndb/test/tools/Makefile.am

@@ -13,7 +13,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
-ndbtest_PROGRAMS = hugoLoad hugoFill hugoLockRecords hugoPkDelete hugoPkRead hugoPkReadRecord  hugoPkUpdate hugoScanRead hugoScanUpdate restart verify_index copy_tab create_index  ndb_cpcc listen_event eventlog
+ndbtest_PROGRAMS = hugoLoad hugoFill hugoLockRecords hugoPkDelete hugoPkRead hugoPkReadRecord  hugoPkUpdate hugoScanRead hugoScanUpdate restart verify_index copy_tab create_index  ndb_cpcc listen_event eventlog rep_latency
 
 # transproxy 
 
@@ -34,6 +34,7 @@ create_index_SOURCES = create_index.cpp
 ndb_cpcc_SOURCES = cpcc.cpp
 listen_event_SOURCES = listen.cpp
 eventlog_SOURCES = log_listner.cpp
+rep_latency_SOURCES = rep_latency.cpp
 
 include $(top_srcdir)/storage/ndb/config/common.mk.am
 include $(top_srcdir)/storage/ndb/config/type_ndbapitest.mk.am

storage/ndb/test/tools/listen.cpp

@@ -22,6 +22,128 @@
 #include <getarg.h>
 
 
+#define BATCH_SIZE 128
+struct Table_info
+{
+  Uint32 id;
+};
+
+struct Trans_arg
+{
+  Ndb *ndb;
+  NdbTransaction *trans;
+  Uint32 bytes_batched;
+};
+
+Vector< Vector<NdbRecAttr*> > event_values;
+Vector< Vector<NdbRecAttr*> > event_pre_values;
+Vector<struct Table_info> table_infos;
+
+static void do_begin(Ndb *ndb, struct Trans_arg &trans_arg)
+{
+  trans_arg.ndb =  ndb;
+  trans_arg.trans = ndb->startTransaction();
+  trans_arg.bytes_batched = 0;
+}
+
+static void do_equal(NdbOperation *op,
+                     NdbEventOperation *pOp)
+{
+  struct Table_info *ti = (struct Table_info *)pOp->getCustomData();
+  Vector<NdbRecAttr*> &ev = event_values[ti->id];
+  const NdbDictionary::Table *tab= pOp->getTable();
+  unsigned i, n_columns = tab->getNoOfColumns();
+  for (i= 0; i < n_columns; i++)
+  {
+    if (tab->getColumn(i)->getPrimaryKey() &&
+        op->equal(i, ev[i]->aRef()))
+    {
+      abort();
+    }
+  }
+}
+
+static void do_set_value(NdbOperation *op,
+                         NdbEventOperation *pOp)
+{
+  struct Table_info *ti = (struct Table_info *)pOp->getCustomData();
+  Vector<NdbRecAttr*> &ev = event_values[ti->id];
+  const NdbDictionary::Table *tab= pOp->getTable();
+  unsigned i, n_columns = tab->getNoOfColumns();
+  for (i= 0; i < n_columns; i++)
+  {
+    if (!tab->getColumn(i)->getPrimaryKey() &&
+        op->setValue(i, ev[i]->aRef()))
+    {
+      abort();
+    }
+  }
+}
+
+static void do_insert(struct Trans_arg &trans_arg, NdbEventOperation *pOp)
+{
+  if (!trans_arg.trans)
+    return;
+
+  NdbOperation *op =
+    trans_arg.trans->getNdbOperation(pOp->getEvent()->getTableName());
+  op->writeTuple();
+
+  do_equal(op, pOp);
+  do_set_value(op, pOp);
+
+  trans_arg.bytes_batched++;
+  if (trans_arg.bytes_batched > BATCH_SIZE)
+  {
+    trans_arg.trans->execute(NdbTransaction::NoCommit);
+    trans_arg.bytes_batched = 0; 
+  }
+}
+static void do_update(struct Trans_arg &trans_arg, NdbEventOperation *pOp)
+{
+  if (!trans_arg.trans)
+    return;
+
+  NdbOperation *op =
+    trans_arg.trans->getNdbOperation(pOp->getEvent()->getTableName());
+  op->writeTuple();
+
+  do_equal(op, pOp);
+  do_set_value(op, pOp);
+
+  trans_arg.bytes_batched++;
+  if (trans_arg.bytes_batched > BATCH_SIZE)
+  {
+    trans_arg.trans->execute(NdbTransaction::NoCommit);
+    trans_arg.bytes_batched = 0; 
+  }
+}
+static void do_delete(struct Trans_arg &trans_arg, NdbEventOperation *pOp)
+{
+  if (!trans_arg.trans)
+    return;
+
+  NdbOperation *op =
+    trans_arg.trans->getNdbOperation(pOp->getEvent()->getTableName());
+  op->deleteTuple();
+
+  do_equal(op, pOp);
+
+  trans_arg.bytes_batched++;
+  if (trans_arg.bytes_batched > BATCH_SIZE)
+  {
+    trans_arg.trans->execute(NdbTransaction::NoCommit);
+    trans_arg.bytes_batched = 0; 
+  }
+}
+static void do_commit(struct Trans_arg &trans_arg)
+{
+  if (!trans_arg.trans)
+    return;
+  trans_arg.trans->execute(NdbTransaction::Commit);
+  trans_arg.ndb->closeTransaction(trans_arg.trans);
+}
+
 int 
 main(int argc, const char** argv){
   ndb_init();
@@ -29,8 +151,14 @@ main(int argc, const char** argv){
   
   int _help = 0;
   const char* db = 0;
+  const char* connectstring1 = 0;
+  const char* connectstring2 = 0;
 
   struct getargs args[] = {
+    { "connectstring1", 'c',
+      arg_string, &connectstring1, "connectstring1", "" },
+    { "connectstring2", 'C',
+      arg_string, &connectstring2, "connectstring2", "" },
     { "database", 'd', arg_string, &db, "Database", "" },
     { "usage", '?', arg_flag, &_help, "Print help", "" }
   };
@@ -46,7 +174,7 @@ main(int argc, const char** argv){
   }
 
   // Connect to Ndb
-  Ndb_cluster_connection con;
+  Ndb_cluster_connection con(connectstring1);
   if(con.connect(12, 5, 1) != 0)
   {
     return NDBT_ProgramExit(NDBT_FAILED);
@@ -62,11 +190,34 @@ main(int argc, const char** argv){
   while(MyNdb.waitUntilReady() != 0)
     ndbout << "Waiting for ndb to become ready..." << endl;
 
+  Ndb_cluster_connection *con2 = NULL;
+  Ndb *ndb2 =  NULL;
+  if (connectstring2)
+  {
+    con2 = new Ndb_cluster_connection(connectstring2);
+
+    if(con2->connect(12, 5, 1) != 0)
+    {
+      return NDBT_ProgramExit(NDBT_FAILED);
+    }
+    ndb2 = new Ndb( con2, db ? db : "TEST_DB" );
+
+    if(ndb2->init() != 0){
+      ERR(ndb2->getNdbError());
+      return NDBT_ProgramExit(NDBT_FAILED);
+    }
+
+    // Connect to Ndb and wait for it to become ready
+    while(ndb2->waitUntilReady() != 0)
+      ndbout << "Waiting for ndb to become ready..." << endl;
+  }
+
   int result = 0;
   
   NdbDictionary::Dictionary *myDict = MyNdb.getDictionary();
   Vector<NdbDictionary::Event*> events;
   Vector<NdbEventOperation*> event_ops;
+  int sz = 0;
   for(i= optind; i<argc; i++)
   {
     const NdbDictionary::Table* table= myDict->getTable(argv[i]);
@@ -121,12 +272,23 @@ main(int argc, const char** argv){
       goto end;
     }
 
+    event_values.push_back(Vector<NdbRecAttr *>());
+    event_pre_values.push_back(Vector<NdbRecAttr *>());
     for (int a = 0; a < table->getNoOfColumns(); a++) 
     {
-      pOp->getValue(table->getColumn(a)->getName());
-      pOp->getPreValue(table->getColumn(a)->getName());
+      event_values[sz].
+        push_back(pOp->getValue(table->getColumn(a)->getName()));
+      event_pre_values[sz].
+        push_back(pOp->getPreValue(table->getColumn(a)->getName()));
     }
     event_ops.push_back(pOp);
+    {
+      struct Table_info ti;
+      ti.id = sz;
+      table_infos.push_back(ti);
+    }
+    pOp->setCustomData((void *)&table_infos[sz]);
+    sz++;
   }
 
   for(i= 0; i<(int)event_ops.size(); i++)
@@ -140,6 +302,7 @@ main(int argc, const char** argv){
     }
   }
 
+  struct Trans_arg trans_arg;
   while(true)
   {
     while(MyNdb.pollEvents(100) == 0);
@@ -149,18 +312,26 @@ main(int argc, const char** argv){
     {
       Uint64 gci= pOp->getGCI();
       Uint64 cnt_i= 0, cnt_u= 0, cnt_d= 0;
+      if (ndb2)
+        do_begin(ndb2, trans_arg);
       do
       {
 	switch(pOp->getEventType())
 	{
 	case NdbDictionary::Event::TE_INSERT:
 	  cnt_i++;
+          if (ndb2)
+            do_insert(trans_arg, pOp);
 	  break;
 	case NdbDictionary::Event::TE_DELETE:
 	  cnt_d++;
+          if (ndb2)
+            do_delete(trans_arg, pOp);
 	  break;
 	case NdbDictionary::Event::TE_UPDATE:
 	  cnt_u++;
+          if (ndb2)
+            do_update(trans_arg, pOp);
 	  break;
 	case NdbDictionary::Event::TE_CLUSTER_FAILURE:
 	  break;
@@ -180,6 +351,8 @@ main(int argc, const char** argv){
 	  abort();
 	}
       } while ((pOp= MyNdb.nextEvent()) && gci == pOp->getGCI());
+      if (ndb2)
+        do_commit(trans_arg);
       ndbout_c("GCI: %lld events: %lld(I) %lld(U) %lld(D)", gci, cnt_i, cnt_u, cnt_d);
     }
   }
@@ -187,8 +360,15 @@ end:
   for(i= 0; i<(int)event_ops.size(); i++)
     MyNdb.dropEventOperation(event_ops[i]);
 
+  if (ndb2)
+    delete ndb2;
+  if (con2)
+    delete con2;
   return NDBT_ProgramExit(NDBT_OK);
 }
 
+template class Vector<struct Table_info>;
+template class Vector<NdbRecAttr*>;
+template class Vector< Vector<NdbRecAttr*> >;
 template class Vector<NdbDictionary::Event*>;
 template class Vector<NdbEventOperation*>;

storage/ndb/test/tools/rep_latency.cpp

+/* Copyright (C) 2003 MySQL AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/* 
+ * Update on master wait for update on slave
+ *
+ */
+
+#include <NdbApi.hpp>
+#include <NdbSleep.h>
+#include <sys/time.h>
+#include <NdbOut.hpp>
+#include <NDBT.hpp>
+
+struct Xxx
+{
+  Ndb *ndb;
+  const NdbDictionary::Table *table;
+  Uint32 pk_col;
+  Uint32 col;
+};
+
+struct XxxR
+{
+  Uint32 pk_val;
+  Uint32 val;
+  struct timeval start_time;
+  Uint32 latency;
+};
+
+static int
+prepare_master_or_slave(Ndb &myNdb,
+                        const char* table,
+                        const char* pk,
+                        Uint32 pk_val,
+                        const char* col,
+                        struct Xxx &xxx,
+                        struct XxxR &xxxr);
+static void
+run_master_update(struct Xxx &xxx, struct XxxR &xxxr);
+static void
+run_slave_wait(struct Xxx &xxx, struct XxxR &xxxr);
+
+#define PRINT_ERROR(code,msg) \
+  g_err << "Error in " << __FILE__ << ", line: " << __LINE__ \
+            << ", code: " << code \
+            << ", msg: " << msg << ".\n"
+#define APIERROR(error) { \
+  PRINT_ERROR((error).code, (error).message); \
+  exit(-1); }
+
+int main(int argc, char** argv)
+{
+  if (argc != 8)
+  {
+    ndbout << "Arguments are <connect_string cluster 1> <connect_string cluster 2> <database> <table name> <primary key> <value of primary key> <attribute to update>.\n";
+    exit(-1);
+  }
+  // ndb_init must be called first
+  ndb_init();
+  {
+    const char *opt_connectstring1 = argv[1];
+    const char *opt_connectstring2 = argv[2];
+    const char *opt_db             = argv[3];
+    const char *opt_table          = argv[4];
+    const char *opt_pk             = argv[5];
+    const Uint32 opt_pk_val        = atoi(argv[6]);
+    const char *opt_col            = argv[7];
+    
+    // Object representing the cluster 1
+    Ndb_cluster_connection cluster1_connection(opt_connectstring1);
+    // Object representing the cluster 2
+    Ndb_cluster_connection cluster2_connection(opt_connectstring2);
+    
+    // connect cluster 1 and run application
+    // Connect to cluster 1  management server (ndb_mgmd)
+    if (cluster1_connection.connect(4 /* retries               */,
+				    5 /* delay between retries */,
+				    1 /* verbose               */))
+    {
+      g_err << "Cluster 1 management server was not ready within 30 secs.\n";
+      exit(-1);
+    }
+    // Optionally connect and wait for the storage nodes (ndbd's)
+    if (cluster1_connection.wait_until_ready(30,0) < 0)
+    {
+      g_err << "Cluster 1 was not ready within 30 secs.\n";
+      exit(-1);
+    }
+    // connect cluster 2 and run application
+    // Connect to cluster management server (ndb_mgmd)
+    if (cluster2_connection.connect(4 /* retries               */,
+				    5 /* delay between retries */,
+				    1 /* verbose               */))
+    {
+      g_err << "Cluster 2 management server was not ready within 30 secs.\n";
+      exit(-1);
+    }
+    // Optionally connect and wait for the storage nodes (ndbd's)
+    if (cluster2_connection.wait_until_ready(30,0) < 0)
+    {
+      g_err << "Cluster 2 was not ready within 30 secs.\n";
+      exit(-1);
+    }
+    // Object representing the database
+    Ndb myNdb1(&cluster1_connection, opt_db);
+    Ndb myNdb2(&cluster2_connection, opt_db);
+    //
+    struct Xxx xxx1;
+    struct Xxx xxx2;
+    struct XxxR xxxr;
+    prepare_master_or_slave(myNdb1, opt_table, opt_pk, opt_pk_val, opt_col,
+                            xxx1, xxxr);
+    prepare_master_or_slave(myNdb2, opt_table, opt_pk, opt_pk_val, opt_col,
+                            xxx2, xxxr);
+    while (1)
+    {
+      // run the application code
+      run_master_update(xxx1, xxxr);
+      run_slave_wait(xxx2, xxxr);
+      ndbout << "latency: " << xxxr.latency << endl;
+    }
+  }
+  // Note: all connections must have been destroyed before calling ndb_end()
+  ndb_end(0);
+
+  return 0;
+}
+
+static int
+prepare_master_or_slave(Ndb &myNdb,
+                        const char* table,
+                        const char* pk,
+                        Uint32 pk_val,
+                        const char* col,
+                        struct Xxx &xxx,
+                        struct XxxR &xxxr)
+{
+  if (myNdb.init())
+    APIERROR(myNdb.getNdbError());
+  const NdbDictionary::Dictionary* myDict = myNdb.getDictionary();
+  const NdbDictionary::Table *myTable = myDict->getTable(table);
+  if (myTable == NULL) 
+    APIERROR(myDict->getNdbError());
+  const NdbDictionary::Column *myPkCol = myTable->getColumn(pk);
+  if (myPkCol == NULL)
+    APIERROR(myDict->getNdbError());
+  if (myPkCol->getType() != NdbDictionary::Column::Unsigned)
+  {
+    PRINT_ERROR(0, "Primary key column not of type unsigned");
+    exit(-1);
+  }
+  const NdbDictionary::Column *myCol = myTable->getColumn(col);
+  if (myCol == NULL)
+    APIERROR(myDict->getNdbError());
+  if (myCol->getType() != NdbDictionary::Column::Unsigned)
+  {
+    PRINT_ERROR(0, "Update column not of type unsigned");
+    exit(-1);
+  }
+
+  xxx.ndb = &myNdb;
+  xxx.table = myTable;
+  xxx.pk_col = myPkCol->getColumnNo();
+  xxx.col = myCol->getColumnNo();
+
+  xxxr.pk_val = pk_val;
+
+  return 0;
+}
+
+static void run_master_update(struct Xxx &xxx, struct XxxR &xxxr)
+{
+  Ndb *ndb = xxx.ndb;
+  const NdbDictionary::Table *myTable = xxx.table;
+  int retry_sleep= 10; /* 10 milliseconds */
+  int retries= 100;
+  while (1)
+  {
+    Uint32 val;
+    NdbTransaction *trans = ndb->startTransaction();
+    if (trans == NULL)
+      goto err;
+    {
+      NdbOperation *op = trans->getNdbOperation(myTable);
+      if (op == NULL)
+        APIERROR(trans->getNdbError());
+      op->readTupleExclusive();
+      op->equal(xxx.pk_col, xxxr.pk_val);
+      op->getValue(xxx.col, (char *)&val);
+    }
+    if (trans->execute(NdbTransaction::NoCommit))
+      goto err;
+    //fprintf(stderr, "read %u\n", val);
+    xxxr.val = val + 1;
+    {
+      NdbOperation *op = trans->getNdbOperation(myTable);
+      if (op == NULL)
+        APIERROR(trans->getNdbError());
+      op->updateTuple();
+      op->equal(xxx.pk_col, xxxr.pk_val);
+      op->setValue(xxx.col, xxxr.val);
+    }
+    if (trans->execute(NdbTransaction::Commit))
+      goto err;
+    ndb->closeTransaction(trans);
+    //fprintf(stderr, "updated to %u\n", xxxr.val);
+    break;
+err:
+    const NdbError this_error= trans ?
+      trans->getNdbError() : ndb->getNdbError();
+    if (this_error.status == NdbError::TemporaryError)
+    {
+      if (retries--)
+      {
+        if (trans)
+          ndb->closeTransaction(trans);
+        NdbSleep_MilliSleep(retry_sleep);
+        continue; // retry
+      }
+    }
+    if (trans)
+      ndb->closeTransaction(trans);
+    APIERROR(this_error);
+  }
+  /* update done start timer */
+  gettimeofday(&xxxr.start_time, 0);
+}
+
+static void run_slave_wait(struct Xxx &xxx, struct XxxR &xxxr)
+{
+  struct timeval old_end_time = xxxr.start_time, end_time;
+  Ndb *ndb = xxx.ndb;
+  const NdbDictionary::Table *myTable = xxx.table;
+  int retry_sleep= 10; /* 10 milliseconds */
+  int retries= 100;
+  while (1)
+  {
+    Uint32 val;
+    NdbTransaction *trans = ndb->startTransaction();
+    if (trans == NULL)
+      goto err;
+    {
+      NdbOperation *op = trans->getNdbOperation(myTable);
+      if (op == NULL)
+        APIERROR(trans->getNdbError());
+      op->readTuple();
+      op->equal(xxx.pk_col, xxxr.pk_val);
+      op->getValue(xxx.col, (char *)&val);
+      if (trans->execute(NdbTransaction::Commit))
+        goto err;
+    }
+    /* read done, check time of read */
+    gettimeofday(&end_time, 0);
+    ndb->closeTransaction(trans);
+    //fprintf(stderr, "read %u waiting for %u\n", val, xxxr.val);
+    if (xxxr.val != val)
+    {
+      /* expected value not received yet */
+      retries = 100;
+      NdbSleep_MilliSleep(retry_sleep);
+      old_end_time =  end_time;
+      continue;
+    }
+    break;
+err:
+    const NdbError this_error= trans ?
+      trans->getNdbError() : ndb->getNdbError();
+    if (this_error.status == NdbError::TemporaryError)
+    {
+      if (retries--)
+      {
+        if (trans)
+          ndb->closeTransaction(trans);
+        NdbSleep_MilliSleep(retry_sleep);
+        continue; // retry
+      }
+    }
+    if (trans)
+      ndb->closeTransaction(trans);
+    APIERROR(this_error);
+  }
+
+  Int64 elapsed_usec1 =
+    ((Int64)end_time.tv_sec - (Int64)xxxr.start_time.tv_sec)*1000*1000 +
+    ((Int64)end_time.tv_usec - (Int64)xxxr.start_time.tv_usec);
+  Int64 elapsed_usec2 =
+    ((Int64)end_time.tv_sec - (Int64)old_end_time.tv_sec)*1000*1000 +
+    ((Int64)end_time.tv_usec - (Int64)old_end_time.tv_usec);
+  xxxr.latency =
+    ((elapsed_usec1 - elapsed_usec2/2)+999)/1000;
+}