Add last_activity field to experiment_stats to make searching/indexing

easier.

Also add a daily_stats table that will record, you guessed it, the
daily stats, which will be a mucg faster wayt to see what is going on
and even generate some graphs.

db/Experiment.pm.in

@@ -525,11 +525,13 @@ sub Create($$$$)
     #
     if (! DBQueryWarn("insert into experiment_stats ".
 		      "(eid, pid, creator, creator_idx, gid, created, ".
-		      " batch, exptidx, rsrcidx, pid_idx, gid_idx, eid_uuid) ".
+		      " batch, exptidx, rsrcidx, pid_idx, gid_idx, eid_uuid, ".
+		      " last_activity) ".
 		      "values('$eid', '$pid', '$creator_uid', '$creator_idx',".
 		      "       '$gid', FROM_UNIXTIME('$now'), ".
 		      "        $batchmode, $exptidx, $rsrcidx, ".
-		      "        $pid_idx, $gid_idx, '$uuid')")) {
+		      "        $pid_idx, $gid_idx, '$uuid', ".
+		      "        FROM_UNIXTIME('$now'))")) {
 	DBQueryWarn("delete from experiments where pid='$pid' and eid='$eid'");
 	DBQueryWarn("delete from experiment_resources where idx=$rsrcidx");
 	DBQueryWarn("unlock tables");
@@ -2172,6 +2174,7 @@ sub PostSwap($$$$)
 	    DBQueryWarn("update experiment_stats ".
 			"set ${tmp}_count=${tmp}_count+1, ".
 			"    ${tmp}_last=now(), ".
+			"    last_activity=${tmp}_last, ".
 			"    swapin_duration=swapin_duration+${duration}, ".
 			"    swap_exitcode=0, ".
 			"    last_error=NULL ".

sql/database-create.sql

@@ -233,6 +233,26 @@ CREATE TABLE `current_reloads` (
   PRIMARY KEY  (`node_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1;
 
+--
+-- Table structure for table `daily_stats`
+--
+
+DROP TABLE IF EXISTS `daily_stats`;
+CREATE TABLE `daily_stats` (
+  `theday` date default NULL,
+  `exptstart_count` int(11) unsigned default '0',
+  `exptpreload_count` int(11) unsigned default '0',
+  `exptswapin_count` int(11) unsigned default '0',
+  `exptswapout_count` int(11) unsigned default '0',
+  `exptswapmod_count` int(11) unsigned default '0',
+  `allexpt_duration` int(11) unsigned default '0',
+  `allexpt_vnodes` int(11) unsigned default '0',
+  `allexpt_vnode_duration` int(11) unsigned default '0',
+  `allexpt_pnodes` int(11) unsigned default '0',
+  `allexpt_pnode_duration` int(11) unsigned default '0',
+  PRIMARY KEY  (`theday`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1;
+
 --
 -- Table structure for table `datapository_databases`
 --
@@ -643,6 +663,7 @@ CREATE TABLE `experiment_stats` (
   `gid_idx` mediumint(8) unsigned NOT NULL default '0',
   `created` datetime default NULL,
   `destroyed` datetime default NULL,
+  `last_activity` datetime default NULL,
   `swapin_count` smallint(5) unsigned default '0',
   `swapin_last` datetime default NULL,
   `swapout_count` smallint(5) unsigned default '0',

sql/database-migrate.txt

@@ -4395,3 +4395,28 @@ last_net_act,last_cpu_act,last_ext_act);
 	  drop primary key,
 	  add primary key (`exptidx`,`slicename`,`plc_idx`);
 
+4.144: Add daily stats for generating reports and graphs?
+
+	CREATE TABLE `daily_stats` (
+	  `theday` date default NULL,
+	  `exptstart_count` int(11) unsigned default '0',
+	  `exptpreload_count` int(11) unsigned default '0',
+	  `exptswapin_count` int(11) unsigned default '0',
+	  `exptswapout_count` int(11) unsigned default '0',
+	  `exptswapmod_count` int(11) unsigned default '0',
+	  `allexpt_duration` int(11) unsigned default '0',
+	  `allexpt_vnodes` int(11) unsigned default '0',
+	  `allexpt_vnode_duration` int(11) unsigned default '0',
+	  `allexpt_pnodes` int(11) unsigned default '0',
+	  `allexpt_pnode_duration` int(11) unsigned default '0',
+	  PRIMARY KEY  (`theday`)
+	) ENGINE=MyISAM DEFAULT CHARSET=latin1;
+
+	alter table experiment_stats add
+	      `last_activity` datetime default NULL after destroyed;
+
+	# this is fine for an initial value.
+	update experiment_stats set last_activity=created
+	      where last_activity is NULL;
+
+