Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22504#discussion_r231346161
--- Diff: docs/configuration.md ---
@@ -266,6 +266,40 @@ of the most common options to set are:
Only has effect in Spark standalone mode or Mesos cluster deploy mode.
</td>
</tr>
+<tr>
+ <td><code>spark.driver.log.dfsDir</code></td>
+ <td>(none)</td>
+ <td>
+ Base directory in which Spark driver logs are synced, if
<code>spark.driver.log.persistToDfs.enabled</code>
+ is true. Within this base directory, each application logs the driver
logs to an application specific file.
+ Users may want to set this to a unified location like an HDFS
directory so driver log files can be persisted
+ for later usage. This directory should allow any Spark user to
read/write files and the Spark History Server
+ user to delete files. Additionally, older logs from this directory are
cleaned by
+ <a href="monitoring.html#spark-history-server-configuration-options">
Spark History Server</a> if
+ <code>spark.history.fs.driverlog.cleaner.enabled</code> is true and,
if they are older than max age configured
+ at <code>spark.history.fs.driverlog.cleaner.maxAge</code>.
--- End diff --
s/at/by setting
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