[GitHub] qiuchenjian commented on a change in pull request #3078: [WIP] Support show lru command to list the cache sizes for all tables

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qiuchenjian commented on a change in pull request #3078: [WIP] Support show lru command to list the cache sizes for all tables
URL: https://github.com/apache/carbondata/pull/3078#discussion_r248964012
 
 

 ##########
 File path: integration/spark2/src/main/scala/org/apache/spark/sql/execution/command/lru/CarbonDataShowLRUCommand.scala
 ##########
 @@ -0,0 +1,197 @@
+/*
+ * 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.spark.sql.execution.command.lru
+
+import scala.collection.mutable
+import scala.collection.JavaConverters._
+
+import org.apache.spark.sql.{CarbonEnv, Row, SparkSession}
+import org.apache.spark.sql.catalyst.TableIdentifier
+import org.apache.spark.sql.catalyst.analysis.NoSuchTableException
+import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference}
+import org.apache.spark.sql.execution.command.DataCommand
+import org.apache.spark.sql.types.{LongType, StringType}
+
+import org.apache.carbondata.core.cache.CacheProvider
+import org.apache.carbondata.core.cache.dictionary.AbstractColumnDictionaryInfo
+import org.apache.carbondata.core.constants.CarbonCommonConstants
+import org.apache.carbondata.core.indexstore.BlockletDataMapIndexWrapper
+
+/**
+ * SHOW LRU
+ */
+case class CarbonDataShowLRUCommand(tableIdentifier: Option[TableIdentifier])
+  extends DataCommand {
+
+  override def output: Seq[Attribute] = {
+    Seq(AttributeReference("database", StringType, nullable = false)(),
+      AttributeReference("table", StringType, nullable = false)(),
+      AttributeReference("index size", LongType, nullable = false)(),
+      AttributeReference("dictionary size", LongType, nullable = false)())
+  }
+
+  override protected def opName: String = "SHOW LRU"
+
+  def showLRUOfAllTables(sparkSession: SparkSession): Seq[Row] = {
+    val currentDatabase = sparkSession.sessionState.catalog.getCurrentDatabase
+    val lruCache = CacheProvider.getInstance().getCarbonLRUCache()
+    if (lruCache == null) {
+      Seq(Row("ALL", "ALL", 0L, 0L),
+        Row(currentDatabase, "ALL", 0L, 0L))
+    } else {
+      val tableIdents = sparkSession.sessionState.catalog.listTables(currentDatabase).toArray
+      val dbLocation = CarbonEnv.getDatabaseLocation(currentDatabase, sparkSession)
+      val tempLocation = dbLocation.replace(
+        CarbonCommonConstants.WINDOWS_FILE_SEPARATOR, CarbonCommonConstants.FILE_SEPARATOR)
+      val tablePaths = tableIdents.map { tableIdent =>
+        (tempLocation + CarbonCommonConstants.FILE_SEPARATOR +
+         tableIdent.table + CarbonCommonConstants.FILE_SEPARATOR,
+          tableIdent.database.get + "." + tableIdent.table)
+      }
+
+      val dictIds = tableIdents.flatMap { tableIdent =>
+        CarbonEnv
+          .getCarbonTable(tableIdent)(sparkSession)
+          .getAllDimensions
+          .asScala
+          .filter(_.isGlobalDictionaryEncoding)
+          .toArray
+          .map(dim => (dim.getColumnId, tableIdent.database.get + "." + tableIdent.table))
+      }
+
+      // all databases
+      var (allIndexSize, allDictSize) = (0L, 0L)
+      // current database
+      var (dbIndexSize, dbDictSize) = (0L, 0L)
+      val tableMapIndexSize = mutable.HashMap[String, Long]()
+      val tableMapDictSize = mutable.HashMap[String, Long]()
+      val cacheIterator = lruCache.getLruCacheMap.entrySet().iterator()
+      while (cacheIterator.hasNext) {
+        val entry = cacheIterator.next()
+        val cache = entry.getValue
+        if (cache.isInstanceOf[BlockletDataMapIndexWrapper]) {
+          allIndexSize = allIndexSize + cache.getMemorySize
+          val indexPath = entry.getKey.replace(
+            CarbonCommonConstants.WINDOWS_FILE_SEPARATOR, CarbonCommonConstants.FILE_SEPARATOR)
+          val tablePath = tablePaths.find(path => indexPath.startsWith(path._1))
+          if (tablePath.isDefined) {
+            dbIndexSize = dbIndexSize + cache.getMemorySize
+            val memorySize = tableMapIndexSize.get(tablePath.get._2)
+            if (memorySize.isEmpty) {
+              tableMapIndexSize.put(tablePath.get._2, cache.getMemorySize)
+            } else {
+              tableMapIndexSize.put(tablePath.get._2, memorySize.get + cache.getMemorySize)
+            }
+          }
+        } else if (cache.isInstanceOf[AbstractColumnDictionaryInfo]) {
+          allDictSize = allDictSize + cache.getMemorySize
+          val dictId = dictIds.find(id => entry.getKey.startsWith(id._1))
+          if (dictId.isDefined) {
+            dbDictSize = dbDictSize + cache.getMemorySize
+            val memorySize = tableMapDictSize.get(dictId.get._2)
+            if (memorySize.isEmpty) {
+              tableMapDictSize.put(dictId.get._2, cache.getMemorySize)
+            } else {
+              tableMapDictSize.put(dictId.get._2, memorySize.get + cache.getMemorySize)
+            }
+          }
+        }
+      }
 
 Review comment:
   Will this pr will support the BloomDataMapCache?

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