diff --git a/checkin_notes b/checkin_notes
index 979cca8094..97a9afdfd8 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -666,3 +666,10 @@ David  17 Jan 2012
         ssim.php
     lib/
         str_util.cpp
+
+David  18 Jan 2012
+    - web: link between LAMMPS job submission page and file sandbox page
+
+    html/user/
+        lammps.php
+        sandbox.php
diff --git a/html/user/lammps.php b/html/user/lammps.php
index dc73e5d4d7..e754d24f7a 100644
--- a/html/user/lammps.php
+++ b/html/user/lammps.php
@@ -121,7 +121,11 @@ function show_submit_form($user) {
     row2("Area", area_select());
     row2("", "<input type=submit value=Prepare>");
     end_table();
-    echo "</form>";
+    echo "</form>
+        <p>
+        <a href=sandbox.php>File sandbox</a>
+    ";
+    
     page_tail();
 }
 
diff --git a/html/user/sandbox.php b/html/user/sandbox.php
index ab1831a2b5..e75df05b37 100644
--- a/html/user/sandbox.php
+++ b/html/user/sandbox.php
@@ -47,8 +47,8 @@ function list_files($user) {
         <form action=sandbox.php method=post ENCTYPE=\"multipart/form-data\">
         <input type=hidden name=action value=upload_file>
         Upload a file to your sandbox:
-        <br><input size=80 type=file name=new_file>
-        <br> <input type=submit value=Upload>
+        <p><input size=80 type=file name=new_file>
+        <p> <input type=submit value=Upload>
         </form>
         <hr>
     ";
@@ -85,6 +85,9 @@ function list_files($user) {
         }
         end_table();
     }
+    echo "
+        <p><a href=lammps.php>Submit LAMMPS jobs</a>
+    ";
     page_tail();
 }
 
diff --git a/ssim/ssim.cpp b/ssim/ssim.cpp
index 596bf1aee3..340de05303 100644
--- a/ssim/ssim.cpp
+++ b/ssim/ssim.cpp
@@ -399,6 +399,20 @@ struct STATS_ITEM {
             break;
         }
     }
+    void print_summary(FILE* f) {
+        double dt = sim.now - start_time;
+        switch (kind) {
+        case DISK:
+            fprintf(f, "%f\n", integral/dt);
+            break;
+        case NETWORK:
+            fprintf(f, "%f\n", integral/dt);
+            break;
+        case FAULT_TOLERANCE:
+            fprintf(f, "%f\n", extreme_val);
+            break;
+        }
+    }
 };
 
 // represents a file to be stored.
@@ -466,6 +480,13 @@ struct DFILE : EVENT {
         download_rate.print();
         printf("  Fault tolerance level:\n");
         fault_tolerance.print();
+
+        FILE* f = fopen("summary.txt", "w");
+        fault_tolerance.print_summary(f);
+        disk_usage.print_summary(f);
+        upload_rate.print_summary(f);
+        download_rate.print_summary(f);
+        fclose(f);
     }
 };
 
diff --git a/ssim/ssim.php b/ssim/ssim.php
index ef5217b16d..aa5a2d34a1 100644
--- a/ssim/ssim.php
+++ b/ssim/ssim.php
@@ -42,7 +42,7 @@ function parse_input_file($filename) {
     return $x;
 }
 
-function make_graph($input, $title, $index) {
+function make_graph($input, $prefix, $title, $index) {
     $gp_filename = $input->name."_$prefix.gp";
     $f = fopen($gp_filename, "w");
     fprintf($f, "set terminal png small size 1024, 768
@@ -62,9 +62,22 @@ plot ");
     fclose($f);
     $png_filename = $input->name."_$prefix.png";
     $cmd = "gnuplot < $gp_filename > $png_filename";
+    echo "$cmd\n";
     system($cmd);
 }
 
+function parse_output_file($fname) {
+    $f = fopen($fname, "r");
+    if (!$f) {
+        die("no output file $fname\n");
+    }
+    $ft = (int)fgets($f);
+    $du = (double)fgets($f);
+    $ul = (double)fgets($f);
+    $dl = (double)fgets($f);
+    return array($ft, $du, $ul, $dl);
+}
+
 if ($argc != 2) {
     die("usage: ssim.php infile\n");
 }
@@ -75,16 +88,15 @@ foreach ($input->policy as $p) {
         die("no policy file '$p'\n");
     }
     foreach ($input->host_life_mean as $hlm) {
-        $cmd = "ssim --policy_file $p --host_life_mean $hlm --connect_interval $input->connect_interval --mean_xfer_rate $input->mean_xfer_rate";
-        //system($cmd);
+        $cmd = "ssim --policy $p --host_life_mean $hlm --connect_interval $input->connect_interval --mean_xfer_rate $input->mean_xfer_rate > /dev/null";
         echo "$cmd\n";
+        system($cmd);
         list($du, $ul, $dl, $ft) = parse_output_file("summary.txt");
-        printf($datafile, "$hlm $du $ul $dl $ft\n");
+        fprintf($datafile, "$hlm $du $ul $dl $ft\n");
     }
+    fclose($datafile);
 }
 
-exit();
-
 make_graph($input, "du", "Disk usage", 2);
 make_graph($input, "ub", "Upload bandwidth", 3);
 make_graph($input, "db", "Download bandwidth", 4);