Database support optimizations. Use PgBouncer to pool connections. Track and manage WAL archives to optimize space and speed up database replication setup.

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1343139 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 58 insertions, 0 deletions

diff --git a/sca-cpp/trunk/components/sqldb/pgsql-clean-archive b/sca-cpp/trunk/components/sqldb/pgsql-clean-archive
new file mode 100755
index 0000000000..0e52fade89
--- /dev/null
+++ b/sca-cpp/trunk/components/sqldb/pgsql-clean-archive
@@ -0,0 +1,58 @@
+#!/bin/sh
+
+#  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.
+
+# Cleanup database archive.
+# Keep the last two backups and corresponding WAL files.
+
+here=`echo "import os; print os.path.realpath('$0')" | python`; here=`dirname $here`
+root=`echo "import os; print os.path.realpath('$1')" | python`
+
+baks=`ls $root/sqldb/archive | sort -r | grep "\.backup$" | head -2`
+wals=`ls $root/sqldb/archive | sort -r | grep -v "\.backup\.tar\.gz$"`
+tars=`ls $root/sqldb/archive | sort -r | grep "\.backup\.tar\.gz$"`
+
+for f in $baks; do
+    if [ "$lastbak" = "" ]; then
+        lastbak=$f
+    else
+        prevbak=$f
+    fi
+done
+
+w=0
+for f in $wals; do
+    if [ "$w" = "2" ]; then
+        rm $root/sqldb/archive/$f
+    fi
+    if [ "$w" = "1" ]; then
+        w=2
+    fi
+    if [ "$f" = "$prevbak" ]; then
+        w=1
+    fi
+done
+
+t=0
+for f in $tars; do
+    if [ "$t" = "2" ]; then
+        rm $root/sqldb/archive/$f
+    fi
+    t=$((t+1))
+done
+