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https://issues.apache.org/jira/browse/GEODE-7953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17090736#comment-17090736
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ASF GitHub Bot commented on GEODE-7953:
---------------------------------------
jhuynh1 commented on a change in pull request #4909:
URL: https://github.com/apache/geode/pull/4909#discussion_r413940221
##########
File path:
geode-core/src/main/java/org/apache/geode/cache/control/RestoreRedundancyResults.java
##########
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
contributor license
+ * agreements. See the NOTICE file distributed with this work for additional
information regarding
+ * copyright ownership. The ASF licenses this file to You under the Apache
License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
License. You may obtain a
+ * copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express
+ * or implied. See the License for the specific language governing permissions
and limitations under
+ * the License.
+ */
+package org.apache.geode.cache.control;
+
+import java.util.Map;
+
+import org.apache.geode.cache.partition.PartitionRebalanceInfo;
+import org.apache.geode.internal.cache.control.RegionRedundancyStatus;
+import
org.apache.geode.internal.cache.partitioned.PartitionedRegionRebalanceOp;
+
+/**
+ * A class to collect the results of restore redundancy operations for one or
more regions and
+ * determine the success of failure of the operation.
+ */
+public interface RestoreRedundancyResults {
+
+ /**
+ * {@link #SUCCESS} is defined as every included region having fully
satisfied redundancy.
+ * {@link #FAILURE} is defined as at least one region that is configured to
have redundant copies
+ * having fewer than its configured number of redundant copies.
+ * {@link #ERROR} is for cases when the restore redundancy operation was
unable to begin or threw
+ * an exception.
+ */
+ enum Status {
+ SUCCESS,
+ FAILURE,
+ ERROR
+ }
+
+ /**
+ * Adds the contents of another {@link RestoreRedundancyResults} object to
this one, including
+ * both {@link RegionRedundancyStatus} objects and information on the number
of primaries
+ * reassigned and the time taken to reassign them.
+ *
+ * @param results a {@link RestoreRedundancyResults} object whose contents
will be added to this
+ * one.
+ */
+ void addRegionResults(RestoreRedundancyResults results);
+
+ /**
+ * Adds information regarding the number of primaries reassigned and the
time taken to reassign
+ * them during a restore redundancy operation.
+ *
+ * @param details a {@link PartitionRebalanceInfo} generated by a
+ * {@link PartitionedRegionRebalanceOp} operation.
+ */
+ void addPrimaryReassignmentDetails(PartitionRebalanceInfo details);
+
+ /**
+ * Adds one {@link RegionRedundancyStatus} to the result set.
+ *
+ * @param regionResult The {@link RegionRedundancyStatus} to be added to the
result set.
+ */
+ void addRegionResult(RegionRedundancyStatus regionResult);
+
+ /**
+ * Returns the {@link Status} of this restore redundancy operation. Possible
statuses are
+ * {@link Status#SUCCESS}, {@link Status#FAILURE} and {@link Status#ERROR}.
+ *
+ * @return The {@link Status} of this restore redundancy operation.
+ */
+ Status getStatus();
+
+ /**
+ * Returns a message describing the results of this restore redundancy
operation.
+ *
+ * @return A {@link String} describing the results of this restore
redundancy operation.
+ */
+ String getMessage();
+
+ /**
+ * Returns the {@link RegionRedundancyStatus} for a specific region or null
if that region
+ * is not present in this {@link RestoreRedundancyResults}.
+ *
+ * @param regionName The region to which the {@link RegionRedundancyStatus}
to be returned
+ * belongs.
+ * @return A {@link RegionRedundancyStatus} for the specified region or null
if that region is not
+ * present in this {@link RestoreRedundancyResults}.
+ */
+ RegionRedundancyStatus getRegionResult(String regionName);
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses}
for regions with
+ * configured redundancy but zero actual redundant copies.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link
RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with
configured redundancy
+ * but zero actual redundant copies.
+ */
+ Map<String, RegionRedundancyStatus> getZeroRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses}
for regions with with
+ * at least one redundant copy, but fewer than the configured number of
redundant copies.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link
RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with at
least one redundant
+ * copy, but fewer than the configured number of redundant copies.
+ */
+ Map<String, RegionRedundancyStatus> getUnderRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses}
for regions with
+ * redundancy satisfied.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link
RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults} with
redundancy satisfied.
+ */
+ Map<String, RegionRedundancyStatus> getSatisfiedRedundancyRegionResults();
+
+ /**
+ * Returns all the {@link RegionRedundancyStatus RegionRedundancyStatuses}
contained in this
+ * {@link RestoreRedundancyResults}. This method may return the actual
backing map depending on
+ * implementation.
+ *
+ * @return A {@link Map} of {@link String} region name to {@link
RegionRedundancyStatus} for every
+ * region contained in this {@link RestoreRedundancyResults}.
+ */
+ Map<String, RegionRedundancyStatus> getRegionResults();
+
+ /**
+ * Returns the total number of primaries that were transferred as part of
the restore redundancy
+ * operations.
+ *
+ * @return the total number of primaries that were transferred
+ */
+ int getTotalPrimaryTransfersCompleted();
Review comment:
I would hope we don't have to transfer that many primaries... ever...Can
we even handle that many buckets (not theoretically but do we know of any cases
where we have over 100 million bucketsâť“)
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> Create Restore Redundancy Internal API
> --------------------------------------
>
> Key: GEODE-7953
> URL: https://issues.apache.org/jira/browse/GEODE-7953
> Project: Geode
> Issue Type: New Feature
> Components: regions
> Reporter: Donal Evans
> Assignee: Donal Evans
> Priority: Major
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> Introduce an internal API to allow redundancy to be restored and primary
> bucket hosts reassigned without necessitating a full rebalance.
> As described in the RFC found here:
> https://cwiki.apache.org/confluence/display/GEODE/Redundancy+Gfsh+Commands
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