shuwang21 commented on code in PR #42357:
URL: https://github.com/apache/spark/pull/42357#discussion_r1327901950
##########
resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/config.scala:
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@@ -462,6 +462,30 @@ package object config extends Logging {
.stringConf
.createWithDefault("yarn.io/fpga")
+ private[spark] val YARN_CLIENT_STAT_CACHE_PRELOAD_ENABLED =
+ ConfigBuilder("spark.yarn.client.statCache.preload.enabled")
+ .doc("This configuration enables statCache to be preloaded at YARN client
side. This feature " +
+ "analyzes the pattern of resources paths, and if multiple resources
shared the same parent " +
+ "directory, a single <code>listStatus</code> will be invoked on the
parent directory " +
+ "instead of multiple <code>getFileStatus</code> performed on each
individual resources. " +
+ "If most resources from a small set of directories, this can
substantially improve job " +
+ "submission time. Enabling this feature may potentially increase client
memory overhead.")
Review Comment:
Do you mean `listStatus ` with `PathFilter `? I can try that.
https://hadoop.apache.org/docs/stable/api/org/apache/hadoop/fs/FileSystem.html#listStatus-org.apache.hadoop.fs.Path-org.apache.hadoop.fs.PathFilter-
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