ajantha-bhat commented on a change in pull request #2814: [CARBONDATA-3001]
configurable page size in MB
URL: https://github.com/apache/carbondata/pull/2814#discussion_r273889773
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File path:
processing/src/main/java/org/apache/carbondata/processing/store/CarbonFactDataHandlerColumnar.java
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@@ -227,50 +260,135 @@ 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;
+ int configuredPageSizeInBytes;
+ String configuredPageSizeStrInBytes =
+
model.getTableSpec().getCarbonTable().getTableInfo().getFactTable().getTableProperties()
+ .get(CarbonCommonConstants.TABLE_PAGE_SIZE_INMB);
Review comment:
ok. done
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