ravipesala commented on a change in pull request #2814: [CARBONDATA-3001]
configurable page size in MB
URL: https://github.com/apache/carbondata/pull/2814#discussion_r275230446
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File path:
processing/src/main/java/org/apache/carbondata/processing/store/CarbonFactDataHandlerColumnar.java
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@@ -227,50 +268,120 @@ public void addDataToStore(CarbonRow row) throws
CarbonDataWriterException {
/**
* Check if column page can be added more rows after adding this row to page.
+ * only few no-dictionary dimensions columns (string, varchar,
+ * complex columns) can grow huge in size.
*
- * A varchar column page uses
SafeVarLengthColumnPage/UnsafeVarLengthColumnPage to store data
- * and encoded using HighCardDictDimensionIndexCodec which will call
getByteArrayPage() from
- * column page and flatten into byte[] for compression.
- * Limited by the index of array, we can only put number of
Integer.MAX_VALUE bytes in a page.
- *
- * Another limitation is from Compressor. Currently we use snappy as default
compressor,
- * and it will call MaxCompressedLength method to estimate the result size
for preparing output.
- * For safety, the estimate result is oversize: `32 + source_len +
source_len/6`.
- * So the maximum bytes to compress by snappy is (2GB-32)*6/7≈1.71GB.
*
- * Size of a row does not exceed 2MB since UnsafeSortDataRows uses 2MB
byte[] as rowBuffer.
- * Such that we can stop adding more row here if any long string column
reach this limit.
- *
- * If use unsafe column page, please ensure the memory configured is enough.
- * @param row
- * @return false if any varchar column page cannot add one more value(2MB)
+ * @param row carbonRow
+ * @return false if next rows can be added to same page.
+ * true if next rows cannot be added to same page
*/
- private boolean isVarcharColumnFull(CarbonRow row) {
- //TODO: test and remove this as now UnsafeSortDataRows can exceed 2MB
- if (model.getVarcharDimIdxInNoDict().size() > 0) {
+ private boolean needToCutThePage(CarbonRow row) {
+ List<DataType> noDictDataTypesList = model.getNoDictDataTypesList();
+ int totalNoDictPageCount = noDictDataTypesList.size() +
model.getNoDictAllComplexColumnDepth();
+ if (totalNoDictPageCount > 0) {
+ int currentElementLength;
+ int bucketCounter = 0;
+ if (configuredPageSizeInBytes == 0) {
+ // no need to cut the page
+ // use default value
+ /*configuredPageSizeInBytes =
+ CarbonCommonConstants.TABLE_PAGE_SIZE_INMB_DEFAULT * 1024 * 1024;*/
+ return false;
+ }
Object[] nonDictArray =
WriteStepRowUtil.getNoDictAndComplexDimension(row);
- for (int i = 0; i < model.getVarcharDimIdxInNoDict().size(); i++) {
- if (DataTypeUtil
-
.isPrimitiveColumn(model.getNoDictAndComplexColumns()[i].getDataType())) {
- // get the size from the data type
- varcharColumnSizeInByte[i] +=
-
model.getNoDictAndComplexColumns()[i].getDataType().getSizeInBytes();
- } else {
- varcharColumnSizeInByte[i] +=
- ((byte[])
nonDictArray[model.getVarcharDimIdxInNoDict().get(i)]).length;
- }
- if (SnappyCompressor.MAX_BYTE_TO_COMPRESS -
- (varcharColumnSizeInByte[i] + dataRows.size() * 4) < (2 <<
20)) {
- LOGGER.debug("Limited by varchar column, page size is " +
dataRows.size());
- // re-init for next page
- varcharColumnSizeInByte = new
int[model.getVarcharDimIdxInNoDict().size()];
- return true;
+ for (int i = 0; i < noDictDataTypesList.size(); i++) {
+ DataType columnType = noDictDataTypesList.get(i);
+ if ((columnType == DataTypes.STRING) || (columnType ==
DataTypes.VARCHAR)) {
+ currentElementLength = ((byte[]) nonDictArray[i]).length;
+ noDictColumnPageSize[bucketCounter] += currentElementLength;
+ canSnappyHandleThisRow(noDictColumnPageSize[bucketCounter]);
+ // If current page size is more than configured page size, cut the
page here.
+ if (noDictColumnPageSize[bucketCounter] + dataRows.size() * 4
+ >= configuredPageSizeInBytes) {
+ if (LOGGER.isDebugEnabled()) {
+ LOGGER.debug("cutting the page. Rows count in this page: " +
dataRows.size());
+ }
+ // re-init for next page
+ noDictColumnPageSize = new int[totalNoDictPageCount];
+ return true;
+ }
+ bucketCounter++;
+ } else if (columnType.isComplexType()) {
+ // this is for depth of each complex column, model is having only
total depth.
+ GenericDataType genericDataType = complexIndexMapCopy
+ .get(i - model.getNoDictionaryCount() +
model.getPrimitiveDimLens().length);
+ int depth = genericDataType.getDepth();
+ List<ArrayList<byte[]>> flatComplexColumnList =
(List<ArrayList<byte[]>>) nonDictArray[i];
+ for (int k = 0; k < depth; k++) {
+ ArrayList<byte[]> children = flatComplexColumnList.get(k);
+ // Add child element from inner list.
+ int complexElementSize = 0;
+ for (byte[] child : children) {
+ complexElementSize += child.length;
+ }
+ noDictColumnPageSize[bucketCounter] += complexElementSize;
+ canSnappyHandleThisRow(noDictColumnPageSize[bucketCounter]);
+ // If current page size is more than configured page size, cut the
page here.
+ if (noDictColumnPageSize[bucketCounter] + dataRows.size() * 4
+ >= configuredPageSizeInBytes) {
+ LOGGER.info("cutting the page. Rows count: " + dataRows.size());
+ // re-init for next page
+ noDictColumnPageSize = new int[totalNoDictPageCount];
+ return true;
+ }
+ bucketCounter++;
+ }
}
}
}
return false;
}
+ private int setFlatCarbonRowForComplex(CarbonRow row) {
Review comment:
Better move this method to `WriteStepRowUtil`
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