LU-657 test: limit the write size in run_dd

[fs/lustre-release.git] / lustre / tests / run_dd.sh

diff --git a/lustre/tests/run_dd.sh b/lustre/tests/run_dd.sh
index 36af6ae..6106bb0 100755 (executable)
--- a/lustre/tests/run_dd.sh
+++ b/lustre/tests/run_dd.sh
@@ -17,7 +17,7 @@ set -x
 
 . $(dirname $0)/functions.sh
 
 
 . $(dirname $0)/functions.sh
 

-assert_env MOUNT END_RUN_FILE LOAD_PID_FILE
+assert_env MOUNT END_RUN_FILE LOAD_PID_FILE LFS

 
 trap signaled TERM
 
 
 trap signaled TERM
 


@@ -28,30 +28,36 @@ TESTDIR=$MOUNT/d0.dd-$(hostname)
 
 CONTINUE=true
 while [ ! -e "$END_RUN_FILE" ] && $CONTINUE; do
 
 CONTINUE=true
 while [ ! -e "$END_RUN_FILE" ] && $CONTINUE; do

-    echoerr "$(date +'%F %H:%M:%S'): dd run starting"
-    mkdir -p $TESTDIR
-    cd $TESTDIR
-    # suppress dd xfer stat to workaround buggy coreutils/gettext
-    # combination in RHEL5 and OEL5, see BZ 21264
-    dd bs=4k count=1000000 status=noxfer if=/dev/zero of=$TESTDIR/dd-file 1>$LOG &
-    load_pid=$!
-    wait $load_pid
-
-    if [ $? -eq 0 ]; then
-        echoerr "$(date +'%F %H:%M:%S'): dd succeeded"
-        cd $TMP
-        rm -rf $TESTDIR
-        echoerr "$(date +'%F %H:%M:%S'): dd run finished"
-    else
-        echoerr "$(date +'%F %H:%M:%S'): dd failed"
-        if [ -z "$ERRORS_OK" ]; then
-            echo $(hostname) >> $END_RUN_FILE
-        fi
-        if [ $BREAK_ON_ERROR ]; then
-            # break
-            CONTINUE=false
-        fi
-    fi
+       echoerr "$(date +'%F %H:%M:%S'): dd run starting"
+       mkdir -p $TESTDIR
+       $LFS setstripe -c -1 $TESTDIR
+       cd $TESTDIR
+       # suppress dd xfer stat to workaround buggy coreutils/gettext
+       # combination in RHEL5 and OEL5, see BZ 21264
+       FREE_SPACE=$($LFS df $TESTDIR|awk '/filesystem summary:/ {print $5}')
+       BLKS=$((FREE_SPACE * 9 / 40))
+       echo "Free disk space is $FREE_SPACE, 4k blocks to dd is $BLKS"
+
+       dd bs=4k count=$BLKS status=noxfer if=/dev/zero of=$TESTDIR/dd-file \
+                                                               1>$LOG &
+       load_pid=$!
+       wait $load_pid
+
+       if [ $? -eq 0 ]; then
+               echoerr "$(date +'%F %H:%M:%S'): dd succeeded"
+               cd $TMP
+               rm -rf $TESTDIR
+               echoerr "$(date +'%F %H:%M:%S'): dd run finished"
+       else
+               echoerr "$(date +'%F %H:%M:%S'): dd failed"
+               if [ -z "$ERRORS_OK" ]; then
+                       echo $(hostname) >> $END_RUN_FILE
+               fi
+               if [ $BREAK_ON_ERROR ]; then
+                       # break
+                       CONTINUE=false
+               fi
+       fi

 done
 
 echoerr "$(date +'%F %H:%M:%S'): dd run exiting"
 done
 
 echoerr "$(date +'%F %H:%M:%S'): dd run exiting"