######################################################################
# customize per survey
-# the SCSI devices to measure
-scsidevs=${scsidevs:-"/dev/sde /dev/sdh"}
+# CHOOSE EITHER scsidevs or rawdevs
+# the SCSI devices to measure - WARNING: will be erased.
+# The raw devices to use
+# rawdevs=${rawdevs:-"/dev/raw/raw1"}
+# scsidevs=`ls /dev/sd[a-z] /dev/sd[a-z][a-z]` # all devices, if you use udev
# result file prefix. date/time+hostname makes unique
# NB ensure the path exists if it includes subdirs
rslt=${rslt:-"/tmp/sgpdd_survey_`date +%F@%R`_`uname -n`"}
# what to do (read or write)
-actions="write read"
+actions=${actions:-"write read"}
# total size per device (MBytes)
# NB bigger than device cache is good
-size=8192
+size=${size:-8192}
# record size (KBytes)
-rszlo=1024
-rszhi=1024
+rszlo=${rszlo:-1024}
+rszhi=${rszhi:-1024}
# Concurrent regions per device
crglo=${crglo:-1}
crghi=${crghi:-256}
# threads to share between concurrent regions per device
+# multiple threads per region simulates a deeper request queue
# NB survey skips over #thr < #regions and #thr/#regions > SG_MAX_QUEUE
thrlo=${thrlo:-1}
thrhi=${thrhi:-4096}
# map given device names into SG device names
i=0
devs=()
-for d in $scsidevs; do
- devs[$i]=`sg_map | awk "{if ($ 2 == \"$d\") print $ 1}"`
- if [ -z "${devs[$i]}" ]; then
- echo "Can't find SG device for $d"
- exit 1
- fi
- i=$((i+1))
-done
+if [ "$scsidevs" ]; then
+ # we will test for a LUN, the test for a partition
+ # if the partition number is > 9 this will fail
+ for d in $scsidevs; do
+ devs[$i]=`sg_map | awk "{if ($ 2 == \"$d\") print $ 1}"`
+ if [ -z "${devs[i]}" ]; then
+ echo "Can't find SG device for $d, testing for partition"
+ pt=`echo $d | sed 's/[0-9]$//'`
+ # Try again
+ devs[$i]=`sg_map | awk "{if ($ 2 == \"$pt\") print $ 1}"`
+ if [ -z "${devs[i]}" ]; then
+ echo "Can't find SG device $pt"
+ exit 1
+ fi
+ fi
+ i=$((i+1))
+ done
+elif [ "$rawdevs" ]; then
+ for r in $rawdevs; do
+ RES=`raw -q $r`
+ if [ $? -eq 0 ];then
+ devs[$i]=$r
+ i=$((i+1))
+ else
+ echo "Raw device $r not set up"
+ exit 1
+ fi
+ done
+else
+ echo "Must specify scsidevs or rawdevs"
+ exit 1
+fi
+
ndevs=${#devs[@]}
rsltf=${rslt}.summary
echo $minusn "$*"
}
+print_summary "$(date) sgpdd-survey on $rawdevs$scsidevs from $(hostname)"
+
for ((rsz=$rszlo;rsz<=$rszhi;rsz*=2)); do
for ((crg=$crglo;crg<=$crghi;crg*=2)); do
for ((thr=$thrlo;thr<=$thrhi;thr*=2)); do