Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/21618#discussion_r200465965
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -656,6 +656,25 @@ object SQLConf {
.intConf
.createWithDefault(10000)
+ val PARALLEL_GET_GLOBBED_PATH_THRESHOLD =
+ buildConf("spark.sql.sources.parallelGetGlobbedPath.threshold")
+ .doc("The maximum number of subfiles or directories allowed after a
globbed path " +
+ "expansion. If the number of paths exceeds this value during
expansion, it tries to " +
+ "expand the globbed in parallel with multi-thread.")
+ .intConf
+ .checkValue(threshlod => threshlod >= 0, "The maximum number of
subfiles or directories " +
+ "must not be negative")
+ .createWithDefault(32)
+
+ val PARALLEL_GET_GLOBBED_PATH_NUM_THREADS =
+ buildConf("spark.sql.sources.parallelGetGlobbedPath.numThreads")
+ .doc("The number of threads to get a collection of path in parallel.
Set the " +
+ "number to avoid generating too many threads.")
+ .intConf
+ .checkValue(parallel => parallel >= 0, "The maximum number of
threads allowed for getting " +
--- End diff --
what happens if this value is equal to zero?
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