LuciferYang commented on code in PR #43138:
URL: https://github.com/apache/spark/pull/43138#discussion_r1338002812
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core/src/main/scala/org/apache/spark/internal/config/package.scala:
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@@ -726,12 +726,12 @@ package object config {
private[spark] val SHUFFLE_SERVICE_DB_BACKEND =
ConfigBuilder(Constants.SHUFFLE_SERVICE_DB_BACKEND)
.doc("Specifies a disk-based store used in shuffle service local db. " +
- "LEVELDB or ROCKSDB.")
+ "Only supported ROCKSDB at now.")
.version("3.4.0")
.stringConf
.transform(_.toUpperCase(Locale.ROOT))
.checkValues(DBBackend.values.map(_.toString).toSet)
- .createWithDefault(DBBackend.LEVELDB.name)
+ .createWithDefault(DBBackend.ROCKSDB.name)
Review Comment:
I'm not against this change, but I'm quite conflicted about it.
For shuffle db, we didn't make `ROCKSDB` the default in Spark 3.5.0, so I'm
not sure if it's appropriate to just remove it in Spark 4.0. This is why I
haven't submitted a pr to address this issue.
Let's wait for other people's opinions.
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