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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2021/02/03 07:53:30 UTC
[GitHub] [iotdb] wangchao316 opened a new pull request #2621: IOTDB-1140 optimize regular data encoding
wangchao316 opened a new pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621
current regular data encoding algorithm：
Calculate the difference between two adjacent values. The smallest difference is used as the equal-frequency frequency.
Determine the data range of this batch of data based on the difference between the last value and the first value.
Traverse this batch of data, use a BitSet, compare the difference between two adjacent values with the same frequency, and save the value true by default,
If the value is not equal to the equal frequency, calculate the number of equal frequency differences and set the value to false at the corresponding position, indicating that the point is a missing point.
this algorithm only can identity missing point, if have error point , it will throw exception..
because BitSet only can do this thing, indicates whether the same frequency exists in a segment of data
But there is some optimize point..
If there is an abnormal value in a column of values, the algorithm is deviated if the difference is directly obtained to the minimum value.
sample: 1000，1100，1800，1400，1500...
current algorithm be do not use...
1800 is a error point, we should identity error point, revise data.
revise data should be : 1000，1100，1300，1400，1500
After discussion with Mr. Huang , solution:
1. The value cannot be in regular encoding.
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[GitHub] [iotdb] wangchao316 closed pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
wangchao316 closed pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621
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[GitHub] [iotdb] sonarcloud[bot] removed a comment on pull request #2621: IOTDB-1140 optimize regular data encoding
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URL: https://github.com/apache/iotdb/pull/2621#issuecomment-773146274
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[GitHub] [iotdb] qiaojialin merged pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
qiaojialin merged pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621
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[GitHub] [iotdb] sonarcloud[bot] commented on pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
sonarcloud[bot] commented on pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621#issuecomment-773104543
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[GitHub] [iotdb] yuqi1129 commented on a change in pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
yuqi1129 commented on a change in pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621#discussion_r571349386
##########
File path: server/src/test/java/org/apache/iotdb/db/integration/IoTDBCheckConfigIT.java
##########
@@ -0,0 +1,149 @@
+/*
+ * 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.iotdb.db.integration;
+
+import org.apache.iotdb.db.conf.IoTDBConfigCheck;
+import org.apache.iotdb.db.conf.IoTDBDescriptor;
+import org.apache.iotdb.db.engine.fileSystem.SystemFileFactory;
+import org.apache.iotdb.db.service.IoTDB;
+import org.apache.iotdb.db.utils.EnvironmentUtils;
+import org.apache.iotdb.tsfile.common.conf.TSFileConfig;
+import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor;
+import org.junit.*;
+
+import java.io.*;
Review comment:
It's no advice to import star in java
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[GitHub] [iotdb] wangchao316 commented on pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
wangchao316 commented on pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621#issuecomment-773293978
@jixuan1989 @qiaojialin hi , could you please review this PR?
Thanks...
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[GitHub] [iotdb] wangchao316 commented on pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
wangchao316 commented on pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621#issuecomment-773293978
@jixuan1989 @qiaojialin hi , could you please review this PR?
Thanks...
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[GitHub] [iotdb] sonarcloud[bot] commented on pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
sonarcloud[bot] commented on pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621#issuecomment-773104543
SonarCloud Quality Gate failed.
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[GitHub] [iotdb] sonarcloud[bot] removed a comment on pull request #2621: IOTDB-1140 optimize regular data encoding
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sonarcloud[bot] removed a comment on pull request #2621:
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[GitHub] [iotdb] wangchao316 closed pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
wangchao316 closed pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621
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[GitHub] [iotdb] sonarcloud[bot] commented on pull request #2621: IOTDB-1140 optimize regular data encoding
Posted by GitBox <gi...@apache.org>.
sonarcloud[bot] commented on pull request #2621:
URL: https://github.com/apache/iotdb/pull/2621#issuecomment-772398744
Kudos, SonarCloud Quality Gate passed!
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