Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2628#discussion_r214560533
--- Diff:
core/src/main/java/org/apache/carbondata/core/datastore/compression/ZstdCompressor.java
---
@@ -0,0 +1,170 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.carbondata.core.datastore.compression;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.DoubleBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import java.nio.LongBuffer;
+import java.nio.ShortBuffer;
+
+import org.apache.carbondata.core.util.ByteUtil;
+
+import com.github.luben.zstd.Zstd;
+
+public class ZstdCompressor implements Compressor {
+ private static final int COMPRESS_LEVEL = 3;
--- End diff --
It's a common parameter for almost all the compressors. The higher level it
is, the bigger compress ratio will achieve while it will takes more time.
Here Zstd use level 3 by default for common use.
---
