davisusanibar commented on code in PR #34873:
URL: https://github.com/apache/arrow/pull/34873#discussion_r1176767869
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java/vector/src/main/java/org/apache/arrow/vector/ipc/ArrowWriter.java:
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@@ -53,6 +53,8 @@ public abstract class ArrowWriter implements AutoCloseable {
protected static final Logger LOGGER =
LoggerFactory.getLogger(ArrowWriter.class);
+ protected static final int compressionLevel = 3;
Review Comment:
> The default level is tricky here:
>
> * LZ4 default level is 1 with range from 1 to 9
> * ZSTD default level is 3 with range from 1 to 22 (also negative levels -1
to -5 are supported)
>
> There is a [discussion](https://github.com/apache/arrow/issues/35287) on
the C++ side to add support of `Codec::Options`. Would it be good to do similar
things on the Java side so we can accommodate different default levels per
codec?
Uhmm, our current compression version only support compression level for
Zstd not for LZ4. I was reviewing and is close the same as [Spark Compression
Level
Zstd](https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/io/CompressionCodec.scala).
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