/*
* FileRepPrimary_StartResyncWorker()
*/
void
FileRepPrimary_StartResyncWorker(void)
{
int status = STATUS_OK;
FileRep_InsertConfigLogEntry("start resync worker");
Insist(fileRepRole == FileRepPrimaryRole);
while (1) {
if (status != STATUS_OK)
{
FileRep_SetSegmentState(SegmentStateFault, FaultTypeMirror);
FileRepSubProcess_SetState(FileRepStateFault);
}
/*
* We are waiting for following conditions to move forward:
*
* Database is running
* And
* if dataState is InResync, we wait for FileRepSubProcess to Ready state
* else don't wait
*/
while (!isDatabaseRunning() ||
!(dataState == DataStateInResync ? FileRepSubProcess_GetState() == FileRepStateReady : true))
{
FileRepSubProcess_ProcessSignals();
if (FileRepSubProcess_GetState() == FileRepStateShutdown ||
FileRepSubProcess_GetState() == FileRepStateShutdownBackends)
{
break;
}
pg_usleep(50000L); /* 50 ms */
}
if (FileRepSubProcess_GetState() == FileRepStateShutdown ||
FileRepSubProcess_GetState() == FileRepStateShutdownBackends) {
break;
}
FileRepSubProcess_InitHeapAccess();
status = FileRepPrimary_RunResyncWorker();
if (status != STATUS_OK) {
continue;
}
break;
} // while(1)
}
/*
*
* FileRepPrimary_RunChangeTrackingCompacting()
*
*/
static void
FileRepPrimary_RunChangeTrackingCompacting(void)
{
int retry = 0;
FileRep_InsertConfigLogEntry("run change tracking compacting if records has to be discarded");
/*
* We have to check if any records have to be discarded from Change Tracking log file.
* Due to crash it can happen that the highest change tracking log lsn > the highest xlog lsn.
*
* Records from change tracking log file can be discarded only after database is started.
* Full environhment has to be set up in order to run queries over SPI.
*/
while (FileRepSubProcess_GetState() != FileRepStateShutdown &&
FileRepSubProcess_GetState() != FileRepStateShutdownBackends &&
isDatabaseRunning() == FALSE)
{
FileRepSubProcess_ProcessSignals();
pg_usleep(50000L); /* 50 ms */
}
ChangeTracking_DoFullCompactingRoundIfNeeded();
/*
* Periodically check if compacting is required.
* Periodic compacting is required in order to
* a) reduce space for change tracking log file
* b) reduce time for transition from Change Tracking to Resync
*/
FileRep_InsertConfigLogEntry("run change tracking compacting");
while (1) {
FileRepSubProcess_ProcessSignals();
while (FileRepSubProcess_GetState() == FileRepStateFault ||
segmentState == SegmentStateChangeTrackingDisabled)
{
FileRepSubProcess_ProcessSignals();
pg_usleep(50000L); /* 50 ms */
}
if (! (FileRepSubProcess_GetState() == FileRepStateReady &&
dataState == DataStateInChangeTracking))
{
break;
}
Insist(fileRepRole == FileRepPrimaryRole);
Insist(dataState == DataStateInChangeTracking);
Insist(FileRepSubProcess_GetState() == FileRepStateReady);
/* retry compacting of change tracking log files once per minute */
pg_usleep(50000L); /* 50 ms */
if (++retry == 1200)
{
ChangeTracking_CompactLogsIfPossible();
retry=0;
}
}
}
