Github user jackylk commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1059#discussion_r123155018
--- Diff:
core/src/main/java/org/apache/carbondata/core/datastore/page/UnsafeFixLengthColumnPage.java
---
@@ -326,9 +327,17 @@ public void encode(PrimitiveCodec codec) {
}
@Override
- public byte[] compress(Compressor compressor) {
- // TODO: use zero-copy raw compression
- return super.compress(compressor);
+ public byte[] compress(Compressor compressor) throws MemoryException,
IOException {
+ // use raw compression and copy to byte[]
+ int inputSize = pageSize << dataType.getSizeBits();
+ int compressedMaxSize = compressor.maxCompressedLength(inputSize);
+ MemoryBlock compressed =
UnsafeMemoryManager.allocateMemoryWithRetry(compressedMaxSize);
--- End diff --
I think it is better to change the logic in UnsafeMemoryManager to simplify
the usage code. In UnsafeMemoryManager, it will use unsafe memory based on
```
boolean offHeap = Boolean.parseBoolean(CarbonProperties.getInstance()
.getProperty(CarbonCommonConstants.ENABLE_OFFHEAP_SORT,
CarbonCommonConstants.ENABLE_OFFHEAP_SORT_DEFAULT));
```
So I suggest to change this part to make one configuration only for unsafe.
Then I will remove other unsafe configuration like
ENABLE_UNSAFE_COLUMN_PAGE_LOADING
@ravipesala please check
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