svn commit - mysqldoc@docsrva: r17408 - in trunk: dynamic-docs/changelog refman-5.1

[jon.stephens]

Author: jstephens
Date: 2009-10-31 13:36:40 +0100 (Sat, 31 Oct 2009)
New Revision: 17408

Log:

Noted greatly improved restart times (redo and filesystem handling 
optimizations) in NDB 6.3.28/7.0.9

(Thanks, AndrewH and Jonas!)



Modified:
   trunk/dynamic-docs/changelog/mysqld-1.xml
   trunk/refman-5.1/mysql-cluster-overview.xml


Modified: trunk/dynamic-docs/changelog/mysqld-1.xml
===================================================================
--- trunk/dynamic-docs/changelog/mysqld-1.xml	2009-10-31 01:07:19 UTC (rev 17407)
+++ trunk/dynamic-docs/changelog/mysqld-1.xml	2009-10-31 12:36:40 UTC (rev 17408)
Changed blocks: 1, Lines Added: 31, Lines Deleted: 0; 1279 bytes

@@ -6,6 +6,37 @@
 ]>
 <changelog>
 
+  <logentry entrytype="feature">
+
+    <tags>
+      <highlight type="cluster"/>
+      <highlight type="performance"/>
+      <manual type="redo log"/>
+      <manual type="filesystem operations"/>
+    </tags>
+
+    <versions>
+      <version ver="5.1.39-ndb-6.3.28"/>
+      <version ver="5.1.39-ndb-7.0.9"/>
+    </versions>
+
+    <message>
+
+      <para>
+        Significant improvements in redo log handling and other
+        filesystem operations can yield a considerable reduction in the
+        time required for restarts. While actual restart times observed
+        in a production setting will naturally vary according to
+        database size, hardware, and other conditions, our own
+        preliminary testing shows that these optimizations can yield
+        startup times that are faster than those typical of previous
+        MySQL Cluster releases by a factor of 50 or more.
+      </para>
+
+    </message>
+
+  </logentry>
+
   <logentry entrytype="bug">
 
     <tags>


Modified: trunk/refman-5.1/mysql-cluster-overview.xml
===================================================================
--- trunk/refman-5.1/mysql-cluster-overview.xml	2009-10-31 01:07:19 UTC (rev 17407)
+++ trunk/refman-5.1/mysql-cluster-overview.xml	2009-10-31 12:36:40 UTC (rev 17408)
Changed blocks: 2, Lines Added: 51, Lines Deleted: 7; 3815 bytes

@@ -2542,15 +2542,37 @@
                 NDB 6.3.27 and later, the <command>ndb_desc</command>
                 utility provides two additional columns in its output
                 that show the amount of space allocated on disk for a
-                given NDB table as well the amount of space that remains
-                available for additional storage of disk-based column
-                data for that table. For more information, see
+                given <literal role="se">NDB</literal> table as well the
+                amount of space that remains available for additional
+                storage of disk-based column data for that table. For
+                more information, see
                 <xref linkend="mysql-cluster-programs-ndb-desc"/>.
               </para>
 
             </formalpara>
           </listitem>
 
+          <listitem>
+            <formalpara>
+
+              <title>Improved restart times</title>
+
+              <para>
+                Optimizations in redo log handling and other filesystem
+                operations introduced in MySQL Cluster NDB 6.3.28 have
+                the potential to reduce considerably the time required
+                for restarts. While actual performance benefits observed
+                in production setups will naturally vary depending on
+                database size, hardware, and other conditions, our own
+                preliminary testing has shown that these improvements
+                can yield startup times that are faster than those
+                typical of previous MySQL Cluster NDB 6.3 releases by a
+                factor of 50 or more.
+              </para>
+
+            </formalpara>
+          </listitem>
+
         </itemizedlist>
       </para>
 

@@ -2969,16 +2991,38 @@
               applicable to individual tables. In MySQL Cluster NDB
               7.0.8 and later, the <command>ndb_desc</command> utility
               provides two additional columns in its output that show
-              the amount of space allocated on disk for a given NDB
-              table as well the amount of space that remains available
-              for additional storage of disk-based column data for that
-              table. For more information, see
+              the amount of space allocated on disk for a given
+              <literal role="se">NDB</literal> table as well the amount
+              of space that remains available for additional storage of
+              disk-based column data for that table. For more
+              information, see
               <xref linkend="mysql-cluster-programs-ndb-desc"/>.
             </para>
 
           </formalpara>
         </listitem>
 
+        <listitem>
+          <formalpara>
+
+            <title>Improved restart times</title>
+
+            <para>
+              Optimizations in redo log handling and other filesystem
+              operations introduced in MySQL Cluster NDB 7.0.9 have the
+              potential to reduce considerably the time required for
+              restarts. While actual performance benefits observed in
+              production setups will naturally vary depending on
+              database size, hardware, and other conditions, our own
+              preliminary testing has shown that these improvements can
+              yield startup times that are faster than those typical of
+              previous MySQL Cluster NDB 7.0 releases by a factor of 50
+              or more.
+            </para>
+
+          </formalpara>
+        </listitem>
+
       </itemizedlist>
 
     </section>