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Posted to reviews@spark.apache.org by "yaooqinn (via GitHub)" <gi...@apache.org> on 2024/01/18 13:01:04 UTC
[PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
yaooqinn opened a new pull request, #44786:
URL: https://github.com/apache/spark/pull/44786
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This PR introduces 2 keys in the form of 'spark.sql.avro.$codecName.level' just like the existing 'spark.sql.avro.deflate.level' for standard and xz codec. W/ this patch, users are able to play the trade-off between the speed and compression ratio when they use AVRO compressed by zstd or xz.
### Why are the changes needed?
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Avro supports compression level for deflate, xz and zstd, but we have only supported deflate.
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yes, new configurations added
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new tests
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no
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun commented on code in PR #44786:
URL: https://github.com/apache/spark/pull/44786#discussion_r1457693863
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
##########
@@ -3625,7 +3625,23 @@ object SQLConf {
.version("2.4.0")
.intConf
.checkValues((1 to 9).toSet + Deflater.DEFAULT_COMPRESSION)
- .createWithDefault(Deflater.DEFAULT_COMPRESSION)
+ .createOptional
Review Comment:
Why do we need to remove the default `Deflater.DEFAULT_COMPRESSION` here?
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun closed pull request #44786: [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files
URL: https://github.com/apache/spark/pull/44786
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun commented on code in PR #44786:
URL: https://github.com/apache/spark/pull/44786#discussion_r1459618369
##########
connector/avro/src/main/scala/org/apache/spark/sql/avro/AvroUtils.scala:
##########
@@ -110,10 +110,12 @@ private[sql] object AvroUtils extends Logging {
case compressed =>
job.getConfiguration.setBoolean("mapred.output.compress", true)
job.getConfiguration.set(AvroJob.CONF_OUTPUT_CODEC, compressed.getCodecName)
- if (compressed == DEFLATE) {
- val deflateLevel = sqlConf.avroDeflateLevel
- logInfo(s"Compressing Avro output using the $codecName codec at level $deflateLevel")
- job.getConfiguration.setInt(AvroOutputFormat.DEFLATE_LEVEL_KEY, deflateLevel)
+ if (compressed.getSupportCompressionLevel) {
+ val level = sqlConf.getConfString(s"spark.sql.avro.$codecName.level",
+ compressed.getDefaultCompressionLevel.toString)
+ logInfo(s"Compressing Avro output using the $codecName codec at level $level")
+ val s = if (compressed == ZSTANDARD) "zstd" else codecName
Review Comment:
@beliefer May I ask your reason? For me, it's not required because Avro's real codec name is `zstandard` instead of `zstd` .
**AVRO REPO** https://github.com/apache/avro/blob/8d610fb5c7d3958256801848dbd80d6f9d3c556b/lang/java/avro/src/main/java/org/apache/avro/file/DataFileConstants.java#L41
```
public static final String ZSTANDARD_CODEC = "zstandard";
```
**SPARK REPO**
https://github.com/apache/spark/blob/39f8e1a5953b5897f893151d24dc585a80c0c8a0/connector/avro/src/main/java/org/apache/spark/sql/avro/AvroCompressionCodec.java#L36
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun commented on PR #44786:
URL: https://github.com/apache/spark/pull/44786#issuecomment-1898811626
Merged to master for Apache Spark 4.0.0.
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "beliefer (via GitHub)" <gi...@apache.org>.
beliefer commented on code in PR #44786:
URL: https://github.com/apache/spark/pull/44786#discussion_r1460278740
##########
connector/avro/src/main/scala/org/apache/spark/sql/avro/AvroUtils.scala:
##########
@@ -110,10 +110,12 @@ private[sql] object AvroUtils extends Logging {
case compressed =>
job.getConfiguration.setBoolean("mapred.output.compress", true)
job.getConfiguration.set(AvroJob.CONF_OUTPUT_CODEC, compressed.getCodecName)
- if (compressed == DEFLATE) {
- val deflateLevel = sqlConf.avroDeflateLevel
- logInfo(s"Compressing Avro output using the $codecName codec at level $deflateLevel")
- job.getConfiguration.setInt(AvroOutputFormat.DEFLATE_LEVEL_KEY, deflateLevel)
+ if (compressed.getSupportCompressionLevel) {
+ val level = sqlConf.getConfString(s"spark.sql.avro.$codecName.level",
+ compressed.getDefaultCompressionLevel.toString)
+ logInfo(s"Compressing Avro output using the $codecName codec at level $level")
+ val s = if (compressed == ZSTANDARD) "zstd" else codecName
Review Comment:
Got it. `zstd` only used for `avro.mapred.zstd.level`.
@dongjoon-hyun Thank you for your explanation.
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "beliefer (via GitHub)" <gi...@apache.org>.
beliefer commented on code in PR #44786:
URL: https://github.com/apache/spark/pull/44786#discussion_r1460278740
##########
connector/avro/src/main/scala/org/apache/spark/sql/avro/AvroUtils.scala:
##########
@@ -110,10 +110,12 @@ private[sql] object AvroUtils extends Logging {
case compressed =>
job.getConfiguration.setBoolean("mapred.output.compress", true)
job.getConfiguration.set(AvroJob.CONF_OUTPUT_CODEC, compressed.getCodecName)
- if (compressed == DEFLATE) {
- val deflateLevel = sqlConf.avroDeflateLevel
- logInfo(s"Compressing Avro output using the $codecName codec at level $deflateLevel")
- job.getConfiguration.setInt(AvroOutputFormat.DEFLATE_LEVEL_KEY, deflateLevel)
+ if (compressed.getSupportCompressionLevel) {
+ val level = sqlConf.getConfString(s"spark.sql.avro.$codecName.level",
+ compressed.getDefaultCompressionLevel.toString)
+ logInfo(s"Compressing Avro output using the $codecName codec at level $level")
+ val s = if (compressed == ZSTANDARD) "zstd" else codecName
Review Comment:
Got it. `zstd` only used for `avro.mapred.zstd.level`.
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "dongjoon-hyun (via GitHub)" <gi...@apache.org>.
dongjoon-hyun commented on code in PR #44786:
URL: https://github.com/apache/spark/pull/44786#discussion_r1457695414
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
##########
@@ -3625,7 +3625,23 @@ object SQLConf {
.version("2.4.0")
.intConf
.checkValues((1 to 9).toSet + Deflater.DEFAULT_COMPRESSION)
- .createWithDefault(Deflater.DEFAULT_COMPRESSION)
+ .createOptional
Review Comment:
Oh, nvm. I found it goes to `DEFLATE(DataFileConstants.DEFLATE_CODEC, true, CodecFactory.DEFAULT_DEFLATE_LEVEL),`.
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "yaooqinn (via GitHub)" <gi...@apache.org>.
yaooqinn commented on PR #44786:
URL: https://github.com/apache/spark/pull/44786#issuecomment-1899516986
Thank you very much @dongjoon-hyun
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Re: [PR] [SPARK-46759][SQL][AVRO] Codec xz and zstandard support compression level for avro files [spark]
Posted by "beliefer (via GitHub)" <gi...@apache.org>.
beliefer commented on code in PR #44786:
URL: https://github.com/apache/spark/pull/44786#discussion_r1458650779
##########
connector/avro/src/main/scala/org/apache/spark/sql/avro/AvroUtils.scala:
##########
@@ -110,10 +110,12 @@ private[sql] object AvroUtils extends Logging {
case compressed =>
job.getConfiguration.setBoolean("mapred.output.compress", true)
job.getConfiguration.set(AvroJob.CONF_OUTPUT_CODEC, compressed.getCodecName)
- if (compressed == DEFLATE) {
- val deflateLevel = sqlConf.avroDeflateLevel
- logInfo(s"Compressing Avro output using the $codecName codec at level $deflateLevel")
- job.getConfiguration.setInt(AvroOutputFormat.DEFLATE_LEVEL_KEY, deflateLevel)
+ if (compressed.getSupportCompressionLevel) {
+ val level = sqlConf.getConfString(s"spark.sql.avro.$codecName.level",
+ compressed.getDefaultCompressionLevel.toString)
+ logInfo(s"Compressing Avro output using the $codecName codec at level $level")
+ val s = if (compressed == ZSTANDARD) "zstd" else codecName
Review Comment:
It seems we should put `logInfo(s"Compressing Avro output using the $codecName codec at level $level")` after val `s = if (compressed == ZSTANDARD) "zstd" else codecName`.
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