[GitHub] [accumulo] dlmarion commented on a change in pull request #2265: Fixes #2199 allow system compaction to preempt queued user compactions

[GitBox <gi...@apache.org>]

dlmarion commented on a change in pull request #2265:
URL: https://github.com/apache/accumulo/pull/2265#discussion_r709078462



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File path: core/src/main/java/org/apache/accumulo/core/conf/Property.java
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@@ -887,6 +887,14 @@
       "2.1.0"),
   TABLE_COMPACTION_DISPATCHER_OPTS("table.compaction.dispatcher.opts.", null, PropertyType.PREFIX,
       "Options for the table compaction dispatcher", "2.1.0"),
+  TABLE_COMPACTION_SELECTION_EXPIRATION("table.compaction.selection.expiration.ms", "1m",
+      PropertyType.TIMEDURATION,
+      "User compactions select files and are then queued for compaction, preventing these files "
+          + "from being used in system compactions.  This timeout allows system compactions to cancel "
+          + "the hold queued user compactions have on files, when its queued for more than the "
+          + "specified time.  If a system compaction cancels a hold and runs, then the user compaction"
+          + " can reselect and hold files after the system compaction runs.   ",

Review comment:
       small nit - there is some space at the end of the description.




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