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mariadb/ndb/test/ndbapi/flexTimedAsynch.cpp
tomas@poseidon.(none) 8327a68438 neww ndb automake
2004-05-26 15:36:55 +00:00

852 lines
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/* 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; either version 2 of the License, or
(at your option) any later version.
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 */
/* ***************************************************
FLEXTIMEDASYNCH
Perform benchmark of insert, update and delete transactions.
Arguments:
-t Number of threads to start, i.e., number of parallel loops, default 1
-p Number of transactions in a batch, default 32
-o Number of batches per loop, default 200
-i Time between batch starts, default 0
-l Number of loops to run, default 1, 0=infinite
-a Number of attributes, default 25
-c Number of operations per transaction
-s Size of each attribute in 32 bit word, default 1 (Primary Key is always of size 1,
independent of this value)
-simple Use simple read to read from database
-dirty Use dirty read to read from database
-write Use writeTuple in insert and update
-n Use standard table names
-no_table_create Don't create tables in db
-temp Use temporary tables, no writing to disk.
Returns:
0 - Test passed
-1 - Test failed
1 - Invalid arguments
* *************************************************** */
#include "NdbApi.hpp"
#include <NdbThread.h>
#include <NdbSleep.h>
#include <NdbTick.h>
#include <NdbOut.hpp>
#include <NdbTimer.hpp>
#include <string.h>
#include <NdbMain.h>
#include <NdbTest.hpp>
#include <NDBT_Error.hpp>
#define MAXSTRLEN 16
#define MAXATTR 64
#define MAXTABLES 64
#define MAXTHREADS 256
#define MAXATTRSIZE 1000
#define PKSIZE 1
enum StartType { stIdle,
stInsert,
stRead,
stUpdate,
stDelete,
stStop } ;
ErrorData * flexTimedAsynchErrorData;
struct ThreadNdb
{
int NoOfOps;
int ThreadNo;
unsigned int threadBase;
unsigned int transactionCompleted;
};
extern "C" void* threadLoop(void*);
void setAttrNames(void);
void setTableNames(void);
void readArguments(int argc, const char** argv);
void createAttributeSpace();
void createTables(Ndb*);
void defineOperation(NdbConnection* aTransObject, StartType aType, unsigned int key, int *);
void execute(StartType aType);
void executeThread(StartType aType, Ndb* aNdbObject, ThreadNdb* threadInfo);
void executeCallback(int result, NdbConnection* NdbObject, void* aObject);
/* epaulsa > *************************************************************/
bool error_handler(const NdbError &) ; //replaces 'goto' things
static int failed = 0 ; // lame global variable that keeps track of failed transactions
// incremented in executeCallback() and reset in main()
/************************************************************* < epaulsa */
static NdbThread* threadLife[MAXTHREADS];
static int tNodeId;
static int ThreadReady[MAXTHREADS];
static StartType ThreadStart[MAXTHREADS];
static char tableName[MAXTABLES][MAXSTRLEN+1];
static char attrName[MAXATTR][MAXSTRLEN+1];
static int *getAttrValueTable;
// Program Parameters
static int tNoOfLoops = 1;
static int tAttributeSize = 1;
static unsigned int tNoOfThreads = 1;
static unsigned int tNoOfTransInBatch = 32;
static unsigned int tNoOfAttributes = 25;
static unsigned int tNoOfBatchesInLoop = 200;
static unsigned int tNoOfOpsPerTrans = 1;
static unsigned int tTimeBetweenBatches = 0;
//Program Flags
static int theTestFlag = 0;
static int theTempFlag = 1;
static int theSimpleFlag = 0;
static int theDirtyFlag = 0;
static int theWriteFlag = 0;
static int theStdTableNameFlag = 0;
static int theTableCreateFlag = 0;
#define START_REAL_TIME NdbTimer timer; timer.doStart();
#define STOP_REAL_TIME timer.doStop();
#define START_TIMER { NdbTimer timer; timer.doStart();
#define STOP_TIMER timer.doStop();
#define PRINT_TIMER(text, trans, opertrans) timer.printTransactionStatistics(text, trans, opertrans); };
void
resetThreads(){
for (int i = 0; i < tNoOfThreads ; i++) {
ThreadReady[i] = 0;
ThreadStart[i] = stIdle;
}
}
void
waitForThreads(void)
{
int cont;
do {
cont = 0;
NdbSleep_MilliSleep(20);
for (int i = 0; i < tNoOfThreads ; i++) {
if (ThreadReady[i] == 0) {
cont = 1;
}
}
} while (cont == 1);
}
void
tellThreads(StartType what)
{
for (int i = 0; i < tNoOfThreads ; i++)
ThreadStart[i] = what;
}
void createAttributeSpace(){
getAttrValueTable = new int[tAttributeSize*
tNoOfThreads *
tNoOfAttributes ];
}
void deleteAttributeSpace(){
delete [] getAttrValueTable;
}
NDB_COMMAND(flexTimedAsynch, "flexTimedAsynch", "flexTimedAsynch [-tpoilcas]", "flexTimedAsynch", 65535)
{
ThreadNdb tabThread[MAXTHREADS];
int tLoops=0;
int returnValue;
//NdbOut flexTimedAsynchNdbOut;
flexTimedAsynchErrorData = new ErrorData;
flexTimedAsynchErrorData->resetErrorCounters();
Ndb* pNdb;
pNdb = new Ndb( "TEST_DB" );
pNdb->init();
readArguments(argc, argv);
createAttributeSpace();
ndbout << endl << "FLEXTIMEDASYNCH - Starting normal mode" << endl;
ndbout << "Perform benchmark of insert, update and delete transactions" << endl << endl;
if(theTempFlag == 0)
ndbout << " " << "Using temporary tables. " << endl;
// -t, tNoOfThreads
ndbout << " " << tNoOfThreads << " number of concurrent threads " << endl;
// -c, tNoOfOpsPerTrans
ndbout << " " << tNoOfOpsPerTrans << " operations per transaction " << endl;
// -p, tNoOfTransInBatch
ndbout << " " << tNoOfTransInBatch << " number of transactions in a batch per thread " << endl;
// -o, tNoOfBatchesInLoop
ndbout << " " << tNoOfBatchesInLoop << " number of batches per loop " << endl;
// -i, tTimeBetweenBatches
ndbout << " " << tTimeBetweenBatches << " milli seconds at least between batch starts " << endl;
// -l, tNoOfLoops
ndbout << " " << tNoOfLoops << " loops " << endl;
// -a, tNoOfAttributes
ndbout << " " << tNoOfAttributes << " attributes per table " << endl;
// -s, tAttributeSize
ndbout << " " << tAttributeSize << " is the number of 32 bit words per attribute " << endl << endl;
NdbThread_SetConcurrencyLevel(2 + tNoOfThreads);
/* print Setting */
flexTimedAsynchErrorData->printSettings(ndbout);
setAttrNames();
setTableNames();
ndbout << "Waiting for ndb to become ready..." <<endl;
if (pNdb->waitUntilReady() == 0) {
tNodeId = pNdb->getNodeId();
ndbout << " NdbAPI node with id = " << tNodeId << endl;
createTables(pNdb);
/****************************************************************
* Create NDB objects. *
****************************************************************/
resetThreads();
for (int i = 0; i < tNoOfThreads ; i++) {
tabThread[i].ThreadNo = i;
threadLife[i] = NdbThread_Create(threadLoop,
(void**)&tabThread[i],
32768,
"flexTimedAsynchThread",
NDB_THREAD_PRIO_LOW);
}
ndbout << endl << "All NDB objects and table created" << endl << endl;
int noOfTransacts = tNoOfTransInBatch*tNoOfBatchesInLoop*tNoOfThreads;
/****************************************************************
* Execute program. *
****************************************************************/
for(;;) {
int loopCount = tLoops + 1 ;
ndbout << endl << "Loop # " << loopCount << endl << endl ;
/****************************************************************
* Perform inserts. *
****************************************************************/
failed = 0 ;
START_TIMER;
execute(stInsert);
STOP_TIMER;
PRINT_TIMER("insert", noOfTransacts, tNoOfOpsPerTrans);
if (0 < failed) {
ndbout << failed << " of the transactions returned errors!, moving on now..."<<endl ;
}
/****************************************************************
* Perform read. *
****************************************************************/
failed = 0 ;
START_TIMER;
execute(stRead);
STOP_TIMER;
PRINT_TIMER("read", noOfTransacts, tNoOfOpsPerTrans);
if (0 < failed) {
ndbout << failed << " of the transactions returned errors!, moving on now..."<<endl ;
}
/****************************************************************
* Perform update. *
***************************************************************/
failed = 0 ;
START_TIMER;
execute(stUpdate);
STOP_TIMER;
PRINT_TIMER("update", noOfTransacts, tNoOfOpsPerTrans) ;
if (0 < failed) {
ndbout << failed << " of the transactions returned errors!, moving on now..."<<endl ;
}
/****************************************************************
* Perform read after update.
****************************************************************/
failed = 0 ;
START_TIMER;
execute(stRead);
STOP_TIMER;
PRINT_TIMER("read", noOfTransacts, tNoOfOpsPerTrans);
if (0 < failed) {
ndbout << failed << " of the transactions returned errors!, moving on now..."<<endl ;
}
/****************************************************************
* Perform delete. *
****************************************************************/
failed = 0;
START_TIMER;
execute(stDelete);
STOP_TIMER;
PRINT_TIMER("delete", noOfTransacts, tNoOfOpsPerTrans);
if (0 < failed) {
ndbout << failed << " of the transactions returned errors!, moving on now..."<<endl ;
}
tLoops++;
ndbout << "--------------------------------------------------" << endl;
if(tNoOfLoops != 0){
if(tNoOfLoops <= tLoops)
break ;
}
}
ndbout << endl << "Benchmark completed!" << endl;
returnValue = NDBT_OK;
execute(stStop);
void * tmp;
for(int i = 0; i<tNoOfThreads; i++){
NdbThread_WaitFor(threadLife[i], &tmp);
NdbThread_Destroy(&threadLife[i]);
}
} else {
ndbout << "NDB is not ready" << endl;
ndbout << "Benchmark failed!" << endl;
returnValue = NDBT_FAILED;
}
deleteAttributeSpace();
delete pNdb;
//printing errorCounters
flexTimedAsynchErrorData->printErrorCounters(ndbout);
return NDBT_ProgramExit(returnValue);
}//main()
////////////////////////////////////////
void execute(StartType aType)
{
resetThreads();
tellThreads(aType);
waitForThreads();
}
void*
threadLoop(void* ThreadData)
{
// Do work until signaled to stop.
Ndb* localNdb;
StartType tType;
ThreadNdb* threadInfo = (ThreadNdb*)ThreadData;
int threadNo = threadInfo->ThreadNo;
localNdb = new Ndb("TEST_DB");
localNdb->init(512);
localNdb->waitUntilReady();
threadInfo->threadBase = (threadNo * 2000000) + (tNodeId * 260000000);
for (;;) {
while (ThreadStart[threadNo] == stIdle) {
NdbSleep_MilliSleep(10);
}
// Check if signal to exit is received
if (ThreadStart[threadNo] == stStop) {
break;
}
tType = ThreadStart[threadNo];
ThreadStart[threadNo] = stIdle;
executeThread(tType, localNdb, threadInfo);
ThreadReady[threadNo] = 1;
}
delete localNdb;
ThreadReady[threadNo] = 1;
NdbThread_Exit(0);
return NULL;
}
void executeThread(StartType aType, Ndb* aNdbObject, ThreadNdb* threadInfo)
{
// Do all batch job in loop with start specified delay
int i, j, k;
NdbConnection* tConArray[1024];
unsigned int tBase;
unsigned int tBase2;
int threadId = threadInfo->ThreadNo;
int *getValueRowAddress = NULL;
NdbTimer timer;
timer.doStart();
for (i = 0; i < tNoOfBatchesInLoop; i++) {
//tBase = threadBase + (i * tNoOfTransInBatch * tNoOfOpsPerTrans);
tBase = threadInfo->threadBase + (i * tNoOfTransInBatch * tNoOfOpsPerTrans);
//tCompleted = 0;
threadInfo->transactionCompleted = 0;
for (j = 0; j < tNoOfTransInBatch; j++) {
tBase2 = tBase + (j * tNoOfOpsPerTrans);
tConArray[j] = aNdbObject->startTransaction();
if ( tConArray[j] == NULL && !error_handler(aNdbObject->getNdbError())) {
ndbout << endl << "Unable to recover! Quiting now" << endl ;
exit (-1) ;
return ;
}
for (k = 0; k < tNoOfOpsPerTrans; k++) {
//-------------------------------------------------------
// Define the operation, but do not execute it yet.
//-------------------------------------------------------
if(aType == stRead){
getValueRowAddress = getAttrValueTable +
threadId * tNoOfAttributes * tAttributeSize;
}
defineOperation(tConArray[j], aType, (tBase2 + k), getValueRowAddress);
}
tConArray[j]->executeAsynchPrepare(Commit, &executeCallback, threadInfo);
}
//-------------------------------------------------------
// Now we have defined a set of transactions (= batch), it is now time
// to execute all of them.
//-------------------------------------------------------
aNdbObject->sendPollNdb(3000, 0, 0);
//while (tCompleted < tNoOfTransInBatch) {
while (threadInfo->transactionCompleted < tNoOfTransInBatch) {
aNdbObject->pollNdb(3000, 0);
ndbout << "threadInfo->transactionCompleted = " <<
threadInfo->transactionCompleted << endl;
}
for (j = 0 ; j < tNoOfTransInBatch ; j++) {
aNdbObject->closeTransaction(tConArray[j]);
}
// Control the elapsed time since the last batch start.
// Wait at least tTimeBetweenBatches milli seconds.
timer.doStop();
while(timer.elapsedTime() < tTimeBetweenBatches){
NdbSleep_MilliSleep(1);
timer.doStop();
}
// Ready to start new batch
timer.doStart();
}
return;
}
void
executeCallback(int result, NdbConnection* NdbObject, void* aObject)
{
//tCompleted++;
ThreadNdb *threadInfo = (ThreadNdb *)aObject;
threadInfo->transactionCompleted++;
if (result == -1) {
// Add complete error handling here
int retCode = flexTimedAsynchErrorData->handleErrorCommon(NdbObject->getNdbError());
if (retCode == 1) {
if (NdbObject->getNdbError().code != 626 && NdbObject->getNdbError().code != 630){
ndbout_c("execute: %s", NdbObject->getNdbError().message);
ndbout_c("Error code = %d", NdbObject->getNdbError().code);}
} else if (retCode == 2) {
ndbout << "4115 should not happen in flexAsynch" << endl;
} else if (retCode == 3) {
/* What can we do here? */
ndbout_c("execute: %s", NdbObject->getNdbError().message);
}//if(retCode == 3)
// ndbout << "Error occured in poll:" << NdbObject->getNdbError() <<
// " ErrorCode = " << NdbObject->getNdbError() << endl;
ndbout << "executeCallback threadInfo->transactionCompleted = " <<
threadInfo->transactionCompleted << endl;
failed++ ;
return;
}
return;
}
void
defineOperation(NdbConnection* localNdbConnection,
StartType aType,
unsigned int threadBase,
int *pRow )
{
NdbOperation* localNdbOperation;
unsigned int loopCountAttributes = tNoOfAttributes;
unsigned int countAttributes;
int attrValue[MAXATTRSIZE];
//-------------------------------------------------------
// Set-up the attribute values for this operation.
//-------------------------------------------------------
for (int k = 0; k < loopCountAttributes; k++) {
*(int *)&attrValue[k] = (int)threadBase;
}
localNdbOperation = localNdbConnection->getNdbOperation(tableName[0]);
if (localNdbOperation == NULL) {
error_handler(localNdbOperation->getNdbError()) ;
}
switch (aType) {
case stInsert: { // Insert case
if (theWriteFlag == 1 && theDirtyFlag == 1) {
localNdbOperation->dirtyWrite();
} else if (theWriteFlag == 1) {
localNdbOperation->writeTuple();
} else {
localNdbOperation->insertTuple();
}
break;
}
case stRead: { // Read Case
if (theSimpleFlag == 1) {
localNdbOperation->simpleRead();
} else if (theDirtyFlag == 1) {
localNdbOperation->dirtyRead();
} else {
localNdbOperation->readTuple();
}
break;
}
case stUpdate: { // Update Case
if (theWriteFlag == 1 && theDirtyFlag == 1) {
localNdbOperation->dirtyWrite();
} else if (theWriteFlag == 1) {
localNdbOperation->writeTuple();
} else if (theDirtyFlag == 1) {
localNdbOperation->dirtyUpdate();
} else {
localNdbOperation->updateTuple();
}
break;
}
case stDelete: { // Delete Case
localNdbOperation->deleteTuple();
break;
}
default: {
error_handler(localNdbOperation->getNdbError());
}
}
localNdbOperation->equal((char*)attrName[0],(char*)&attrValue[0]);
switch (aType) {
case stInsert: // Insert case
case stUpdate: // Update Case
{
for (countAttributes = 1; countAttributes < loopCountAttributes; countAttributes++) {
localNdbOperation->setValue( (char*)attrName[countAttributes],(char*)&attrValue[0]);
}
break;
}
case stRead: { // Read Case
for (countAttributes = 1; countAttributes < loopCountAttributes; countAttributes++) {
//localNdbOperation->getValue((char*)attrName[countAttributes],(char*)&attrValue[0]);
localNdbOperation->getValue((char*)attrName[countAttributes],
(char *) (pRow + countAttributes*tAttributeSize));
}
break;
}
case stDelete: { // Delete Case
break;
}
default: {
error_handler(localNdbOperation->getNdbError());
}
}
return;
}
void readArguments(int argc, const char** argv)
{
int i = 1;
while (argc > 1)
{
if (strcmp(argv[i], "-t") == 0)
{
tNoOfThreads = atoi(argv[i+1]);
// if ((tNoOfThreads < 1) || (tNoOfThreads > MAXTHREADS))
if ((tNoOfThreads < 1) || (tNoOfThreads > MAXTHREADS))
exit(-1);
}
else if (strcmp(argv[i], "-i") == 0)
{
tTimeBetweenBatches = atoi(argv[i+1]);
if (tTimeBetweenBatches < 0)
exit(-1);
}
else if (strcmp(argv[i], "-p") == 0)
{
tNoOfTransInBatch = atoi(argv[i+1]);
//if ((tNoOfTransInBatch < 1) || (tNoOfTransInBatch > MAXTHREADS))
if ((tNoOfTransInBatch < 1) || (tNoOfTransInBatch > 10000))
exit(-1);
}
else if (strcmp(argv[i], "-c") == 0)
{
tNoOfOpsPerTrans = atoi(argv[i+1]);
if (tNoOfOpsPerTrans < 1)
exit(-1);
}
else if (strcmp(argv[i], "-o") == 0)
{
tNoOfBatchesInLoop = atoi(argv[i+1]);
if (tNoOfBatchesInLoop < 1)
exit(-1);
}
else if (strcmp(argv[i], "-a") == 0)
{
tNoOfAttributes = atoi(argv[i+1]);
if ((tNoOfAttributes < 2) || (tNoOfAttributes > MAXATTR))
exit(-1);
}
else if (strcmp(argv[i], "-n") == 0)
{
theStdTableNameFlag = 1;
argc++;
i--;
}
else if (strcmp(argv[i], "-l") == 0)
{
tNoOfLoops = atoi(argv[i+1]);
if ((tNoOfLoops < 0) || (tNoOfLoops > 100000))
exit(-1);
}
else if (strcmp(argv[i], "-s") == 0)
{
tAttributeSize = atoi(argv[i+1]);
if ((tAttributeSize < 1) || (tAttributeSize > MAXATTRSIZE))
exit(-1);
}
else if (strcmp(argv[i], "-simple") == 0)
{
theSimpleFlag = 1;
argc++;
i--;
}
else if (strcmp(argv[i], "-write") == 0)
{
theWriteFlag = 1;
argc++;
i--;
}
else if (strcmp(argv[i], "-dirty") == 0)
{
theDirtyFlag = 1;
argc++;
i--;
}
else if (strcmp(argv[i], "-test") == 0)
{
theTestFlag = 1;
argc++;
i--;
}
else if (strcmp(argv[i], "-temp") == 0)
{
theTempFlag = 0; // 0 if temporary tables.
argc++;
i--;
}
else if (strcmp(argv[i], "-no_table_create") == 0)
{
theTableCreateFlag = 1;
argc++;
i--;
}
else
{
ndbout << "Arguments: " << endl;
ndbout << "-t Number of threads to start, i.e., number of parallel loops, default 1 " << endl;
ndbout << "-p Number of transactions in a batch, default 32 " << endl;
ndbout << "-o Number of batches per loop, default 200 " << endl;
ndbout << "-i Minimum time between batch starts in milli seconds, default 0 " << endl;
ndbout << "-l Number of loops to run, default 1, 0=infinite " << endl;
ndbout << "-a Number of attributes, default 25 " << endl;
ndbout << "-c Number of operations per transaction, default 1 " << endl;
ndbout << "-s Size of each attribute in 32 bit word, default 1"
"(Primary Key is always of size 1, independent of this value) " << endl;
ndbout << "-simple Use simple read to read from database " << endl;
ndbout << "-dirty Use dirty read to read from database " << endl;
ndbout << "-write Use writeTuple in insert and update " << endl;
ndbout << "-n Use standard table names " << endl;
ndbout << "-no_table_create Don't create tables in db " << endl;
ndbout << "-temp Use temporary tables, no writing to disk. " << endl;
exit(-1);
}
argc -= 2;
i = i + 2;
}
}
void setAttrNames()
{
int i;
for (i = 0; i < MAXATTR ; i++)
{
sprintf(attrName[i], "COL%d", i);
}
}
void setTableNames()
{
// Note! Uses only uppercase letters in table name's
// so that we can look at the tables with SQL
int i;
for (i = 0; i < MAXTABLES ; i++)
{
if (theStdTableNameFlag==1)
{
sprintf(tableName[i], "TAB%d_%d", tNoOfAttributes,
NdbTick_CurrentMillisecond()/1000);
} else {
sprintf(tableName[i], "TAB%d_%d", tNoOfAttributes, tAttributeSize*4);
}
}
}
void createTables(Ndb* pMyNdb)
{
NdbSchemaCon *MySchemaTransaction;
NdbSchemaOp *MySchemaOp;
int check;
if (theTableCreateFlag == 0)
{
for(int i=0; i < 1 ;i++)
{
ndbout << "Creating " << tableName[i] << "..." << endl;
MySchemaTransaction = pMyNdb->startSchemaTransaction();
if( MySchemaTransaction ==
NULL && (!error_handler(MySchemaTransaction->getNdbError())))
exit(-1) ;/*goto error_handler; <epaulsa*/
MySchemaOp = MySchemaTransaction->getNdbSchemaOp();
if( MySchemaOp == NULL
&& (!error_handler(MySchemaTransaction->getNdbError())))
exit(-1) ;
check = MySchemaOp->createTable( tableName[i],
8, // Table Size
TupleKey, // Key Type
40, // Nr of Pages
All, // FragmentType
6,
78,
80,
1, // MemoryType
theTempFlag // 0 if temporary tables else 1
);
if ( check == -1 && (!error_handler(MySchemaTransaction->getNdbError())))
exit(-1) ; /* epaulsa > goto error_handler; < epaulsa */
check = MySchemaOp->createAttribute( (char*)attrName[0],
TupleKey,
32,
PKSIZE,
UnSigned,
MMBased,
NotNullAttribute );
if ( check == -1 &&(!error_handler(MySchemaTransaction->getNdbError())))
exit(-1) ; /* epaulsa > goto error_handler; < epaulsa */
for (int j = 1; j < tNoOfAttributes ; j++)
{
check = MySchemaOp->createAttribute( (char*)attrName[j],
NoKey,
32,
tAttributeSize,
UnSigned,
MMBased,
NotNullAttribute );
if ( check == -1
&& (!error_handler(MySchemaTransaction->getNdbError())))
exit(-1) ; /* epaulsa > goto error_handler; < epaulsa */
}
if ( MySchemaTransaction->execute() == -1
&&(!error_handler(MySchemaTransaction->getNdbError())))
exit(-1) ; /* epaulsa > goto error_handler; < epaulsa */
pMyNdb->closeSchemaTransaction(MySchemaTransaction);
}
}
return;
}
bool error_handler(const NdbError & err) {
ndbout << err << endl ;
if ( 4008==err.code || 721==err.code || 266==err.code ){
ndbout << endl << "Attempting to recover and continue now..." << endl ;
return true ; // return true to retry
}
return false ; // return false to abort
}
//*******************************************************************************************
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