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From elecha...@apache.org
Subject svn commit: r1665131 - /directory/mavibot/trunk/mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java
Date Mon, 09 Mar 2015 06:30:49 GMT
Author: elecharny
Date: Mon Mar  9 06:30:49 2015
New Revision: 1665131

URL: http://svn.apache.org/r1665131
Log:
Speedup: we don't write the recordManager everytime a btree is modified, we do that when a
full transaction is committed. Otherwise, we had this page written twice, once when the B-tree
was updated, and another one when the BoB B-tree was updated.

Modified:
    directory/mavibot/trunk/mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java

Modified: directory/mavibot/trunk/mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java
URL: http://svn.apache.org/viewvc/directory/mavibot/trunk/mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java?rev=1665131&r1=1665130&r2=1665131&view=diff
==============================================================================
--- directory/mavibot/trunk/mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java
(original)
+++ directory/mavibot/trunk/mavibot/src/main/java/org/apache/directory/mavibot/btree/RecordManager.java
Mon Mar  9 06:30:49 2015
@@ -2020,8 +2020,15 @@ public class RecordManager extends Abstr
 
         try
         {
-            writeCounter.put( 0L, writeCounter.containsKey( 0L ) ? writeCounter.get( 0L )
+ 1 : 1 );
-            fileChannel.write( RECORD_MANAGER_HEADER_BUFFER, 0 );
+
+            Integer nbTxnStarted = context.get();
+
+            if ( ( nbTxnStarted == null ) || ( nbTxnStarted <= 1 ) )
+            {
+                //System.out.println( "Writing page at 0000" );
+                writeCounter.put( 0L, writeCounter.containsKey( 0L ) ? writeCounter.get(
0L ) + 1 : 1 );
+                fileChannel.write( RECORD_MANAGER_HEADER_BUFFER, 0 );
+            }
         }
         catch ( IOException ioe )
         {
@@ -2523,6 +2530,7 @@ public class RecordManager extends Abstr
                 //fileChannel.force( false );
             }
 
+            //System.out.println( "Writing page at " + Long.toHexString( pos ) );
             writeCounter.put( pos, writeCounter.containsKey( pos ) ? writeCounter.get( pos
) + 1 : 1 );
 
             nbUpdatePageIOs.incrementAndGet();
@@ -3060,6 +3068,7 @@ public class RecordManager extends Abstr
      */
     private PageIO fetchNewPage() throws IOException
     {
+        //System.out.println( "Fetching new page" );
         if ( firstFreePage == NO_PAGE )
         {
             nbCreatedPages.incrementAndGet();
@@ -3950,6 +3959,8 @@ public class RecordManager extends Abstr
 
     private void checkFreePages() throws EndOfFileExceededException, IOException
     {
+        //System.out.println( "Checking the free pages, starting from " + Long.toHexString(
firstFreePage ) );
+
         // read all the free pages, add them into a set, to be sure we don't have a cycle
         Set<Long> freePageOffsets = new HashSet<Long>();
 
@@ -3957,6 +3968,8 @@ public class RecordManager extends Abstr
 
         while ( currentFreePageOffset != NO_PAGE )
         {
+            //System.out.println( "Next page offset :" + Long.toHexString( currentFreePageOffset
) );
+
             if ( ( currentFreePageOffset % pageSize ) != 0 )
             {
                 throw new InvalidOffsetException( "Wrong offset : " + Long.toHexString( currentFreePageOffset
) );



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