/*
* Perform a large write i/o.
*/
static void BufferedAppendWrite(
BufferedAppend *bufferedAppend)
{
int32 writeLen;
uint8 *largeWriteMemory;
int actualLen;
writeLen = bufferedAppend->largeWriteLen;
Assert(bufferedAppend->largeWriteLen > 0);
largeWriteMemory = bufferedAppend->largeWriteMemory;
#ifdef USE_ASSERT_CHECKING
{
int64 currentWritePosition;
currentWritePosition = FileNonVirtualCurSeek(bufferedAppend->file);
if (currentWritePosition < 0)
ereport(ERROR, (errcode_for_file_access(),
errmsg("unable to get current position in table \"%s\" for file \"%s\" (errcode %d)",
bufferedAppend->relationName,
bufferedAppend->filePathName,
errno)));
if (currentWritePosition != bufferedAppend->largeWritePosition)
ereport(ERROR, (errcode_for_file_access(),
errmsg("Current position mismatch actual "
INT64_FORMAT ", expected " INT64_FORMAT " in table \"%s\" for file \"%s\"",
currentWritePosition, bufferedAppend->largeWritePosition,
bufferedAppend->relationName,
bufferedAppend->filePathName)));
}
#endif
while (writeLen > 0)
{
int primaryError;
bool mirrorDataLossOccurred;
MirroredAppendOnly_Append(
&bufferedAppend->mirroredOpen,
(char*)largeWriteMemory,
writeLen,
&primaryError,
&mirrorDataLossOccurred);
if (primaryError != 0)
ereport(ERROR,
(errcode_for_file_access(),
errmsg("Could not write in table \"%s\" to segment file '%s': %m",
bufferedAppend->relationName,
bufferedAppend->filePathName)));
elogif(Debug_appendonly_print_append_block, LOG,
"Append-Only storage write: table '%s', segment file '%s', write position " INT64_FORMAT ", "
"writeLen %d (equals large write length %d is %s)",
bufferedAppend->relationName,
bufferedAppend->filePathName,
bufferedAppend->largeWritePosition,
writeLen,
bufferedAppend->largeWriteLen,
(writeLen == bufferedAppend->largeWriteLen ? "true" : "false"));
actualLen = writeLen;
writeLen -= actualLen;
largeWriteMemory += actualLen;
}
bufferedAppend->largeWritePosition += bufferedAppend->largeWriteLen;
bufferedAppend->largeWriteLen = 0;
}
/*
* Perform a large read i/o.
*/
static void
BufferedReadIo(
BufferedRead *bufferedRead)
{
int32 largeReadLen;
uint8 *largeReadMemory;
int32 offset;
largeReadLen = bufferedRead->largeReadLen;
Assert(bufferedRead->largeReadLen > 0);
largeReadMemory = bufferedRead->largeReadMemory;
#ifdef USE_ASSERT_CHECKING
{
int64 currentReadPosition;
currentReadPosition = FileNonVirtualCurSeek(bufferedRead->file);
if (currentReadPosition < 0)
ereport(ERROR, (errcode_for_file_access(),
errmsg("unable to get current position for table \"%s\" in file \"%s\": %m",
bufferedRead->relationName,
bufferedRead->filePathName)));
if (currentReadPosition != bufferedRead->largeReadPosition)
{
ereport(ERROR, (errcode_for_file_access(),
errmsg("Current position mismatch actual "
INT64_FORMAT ", expected " INT64_FORMAT " for table \"%s\" in file \"%s\"",
currentReadPosition, bufferedRead->largeReadPosition,
bufferedRead->relationName,
bufferedRead->filePathName)));
}
}
#endif
offset = 0;
while (largeReadLen > 0)
{
int actualLen = FileRead(
bufferedRead->file,
(char *) largeReadMemory,
largeReadLen);
if (actualLen == 0)
ereport(ERROR, (errcode_for_file_access(),
errmsg("read beyond eof in table \"%s\" file \"%s\", "
"read position " INT64_FORMAT " (small offset %d), "
"actual read length %d (large read length %d)",
bufferedRead->relationName,
bufferedRead->filePathName,
bufferedRead->largeReadPosition,
offset,
actualLen,
bufferedRead->largeReadLen)));
else if (actualLen < 0)
ereport(ERROR, (errcode_for_file_access(),
errmsg("unable to read table \"%s\" file \"%s\", "
"read position " INT64_FORMAT " (small offset %d), "
"actual read length %d (large read length %d): %m",
bufferedRead->relationName,
bufferedRead->filePathName,
bufferedRead->largeReadPosition,
offset,
actualLen,
bufferedRead->largeReadLen)));
elogif(Debug_appendonly_print_read_block, LOG,
"Append-Only storage read: table \"%s\", segment file \"%s\", read position " INT64_FORMAT " (small offset %d), "
"actual read length %d (equals large read length %d is %s)",
bufferedRead->relationName,
bufferedRead->filePathName,
bufferedRead->largeReadPosition,
offset,
actualLen,
bufferedRead->largeReadLen,
(actualLen == bufferedRead->largeReadLen ? "true" : "false"));
largeReadLen -= actualLen;
largeReadMemory += actualLen;
offset += actualLen;
}
if (VacuumCostActive)
VacuumCostBalance += VacuumCostPageMiss;
}
