Changeset 13245

Timestamp:

May 4, 2007, 11:20:43 AM (19 years ago)

Author:

jhoblitt

Message:

change getmountedvol() to set it's own transaction level to attempt to avoid hanging when the mounted table is modified while it's running

Location:

trunk

Files:

• Nebulous-Server/lib/Nebulous/Server/SQL.pm (modified) (3 diffs)
• Nebulous/lib/Nebulous/Server/SQL.pm (modified) (3 diffs)

trunk/Nebulous-Server/lib/Nebulous/Server/SQL.pm

@@ -1 +1 @@
 # Copyright (c) 2004  Joshua Hoblitt
 #
-# $Id: SQL.pm,v 1.38 2007-05-04 03:09:16 jhoblitt Exp $
+# $Id: SQL.pm,v 1.39 2007-05-04 21:20:43 jhoblitt Exp $
 
 package Nebulous::Server::SQL;
@@ -394 +394 @@
     DECLARE allocatevar BOOLEAN;
     DECLARE availablevar BOOLEAN;
+    DECLARE trans_level VARCHAR(255);
     DECLARE cur1 CURSOR FOR SELECT vol_id, name, path, allocate, available FROM volume;
     DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = TRUE;
+
+    -- store the current transaction level
+    SELECT @@session.tx_isolation INTO trans_level; 
+
+    -- set trans level
+    SET @@session.tx_isolation = 'REPEATABLE-READ';
 
     -- create a temp table to hold the merged results of the volume & mount
@@ -436 +443 @@
     
     CLOSE cur1;
+
+    -- restore the original transaction level
+    SET @@session.tx_isolation = trans_level;
 END 

trunk/Nebulous/lib/Nebulous/Server/SQL.pm

@@ -1 +1 @@
 # Copyright (c) 2004  Joshua Hoblitt
 #
-# $Id: SQL.pm,v 1.38 2007-05-04 03:09:16 jhoblitt Exp $
+# $Id: SQL.pm,v 1.39 2007-05-04 21:20:43 jhoblitt Exp $
 
 package Nebulous::Server::SQL;
@@ -394 +394 @@
     DECLARE allocatevar BOOLEAN;
     DECLARE availablevar BOOLEAN;
+    DECLARE trans_level VARCHAR(255);
     DECLARE cur1 CURSOR FOR SELECT vol_id, name, path, allocate, available FROM volume;
     DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = TRUE;
+
+    -- store the current transaction level
+    SELECT @@session.tx_isolation INTO trans_level; 
+
+    -- set trans level
+    SET @@session.tx_isolation = 'REPEATABLE-READ';
 
     -- create a temp table to hold the merged results of the volume & mount
@@ -436 +443 @@
     
     CLOSE cur1;
+
+    -- restore the original transaction level
+    SET @@session.tx_isolation = trans_level;
 END