Github user keith-turner commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/180#discussion_r90980177
--- Diff:
core/src/main/java/org/apache/accumulo/core/client/admin/SummaryRetriever.java
---
@@ -0,0 +1,46 @@
+/*
+ * 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.accumulo.core.client.admin;
+
+import java.util.Map;
+
+import org.apache.hadoop.io.Text;
+
+public interface SummaryRetriever {
+
+ /**
+ * Allows optionally setting start row before retrieving data.
+ */
+ SummaryRetriever start(Text startRow);
--- End diff --
@joshelser I created something called SummaryStore in ab8deb7. It
generates ~10 summaries for input data without knowing how many keys will be
added beforhand. Uses the approach I mentioned above of merging summaries.
One additional step I discovered I needed to do was double the number of
key/vals per summary each time I merged.
So if I have 10 summaries each covering 1000 keys, when I merge to 5 then
each of those represents 2000 keys. So now I want start adding summaries every
2000 keys. Next time I merge, I will start adding summaries every 4000 keys...
etc.
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