X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Fscript%2Fsmr_benchmark%2FlinearCopy.sh;fp=src%2Fceph%2Fsrc%2Fscript%2Fsmr_benchmark%2FlinearCopy.sh;h=30a6044a86ec6548a79a4375c6ff59c1960f0220;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git

diff --git a/src/ceph/src/script/smr_benchmark/linearCopy.sh b/src/ceph/src/script/smr_benchmark/linearCopy.sh
new file mode 100755
index 0000000..30a6044
--- /dev/null
+++ b/src/ceph/src/script/smr_benchmark/linearCopy.sh
@@ -0,0 +1,91 @@
+#! /bin/bash
+
+# copy a linear file from srcFile to destination disk in a loop until writeSize MBs is written
+# destinationDisk is a SMR Host Aware Disk eg. /dev/sdb
+
+if [ "$#" -lt 3 ]; then
+	echo "Usage ./linearCopy.sh srcFile destinationDisk writeSize(MB)"
+	exit
+fi
+
+if [ "$(id -u)" != "0" ]; then
+	echo "Please run as sudo user"
+	exit
+fi
+
+srcFile=$1
+destDisk=$2
+writeSize=$3
+verbose=true
+
+if [ -f time ]; then
+	rm -rf time
+fi
+
+#chunkSize=4096 # in bytes
+chunkSize=1048576 # in bytes
+fileSize=`stat --printf="%s" $srcFile`
+
+numChunksInFile=`echo "$fileSize * (1048576 / $chunkSize)" | bc`
+chunksLeft=$(( $(($writeSize * 1048576)) / $chunkSize))
+
+
+echo "fileSize = $fileSize"
+
+if [ "$(($fileSize % 512))" -ne 0 ]; then
+	echo "$srcFile not 512 byte aligned"
+	exit
+fi
+
+if [ "$(($chunkSize % 512))" -ne 0 ]; then
+	echo "$chunkSize not 512 byte aligned"
+	exit
+fi
+
+if [ "$fileSize" -lt "$chunkSize" ]; then
+	echo "filesize $fileSize should be greater than chunkSize $chunkSize"
+	exit
+fi
+
+
+numFileChunks=$(($fileSize / $chunkSize))
+if [ $verbose == true ]; then
+	echo "numFileChunks = $numFileChunks"
+fi
+
+smrLBAStart=33554432 # TODO query from SMR Drive
+#smrLBAStart=37224448
+
+offset=$(( $smrLBAStart / $(( $chunkSize / 512)) ))
+
+if [ $verbose == true ]; then
+	echo "chunksLeft = $chunksLeft, offset = $offset"
+fi
+
+chunkNum=0
+
+while [ "$chunksLeft" -gt 0 ]; do
+	chunkNum=$(($chunkNum + 1))
+	if [ $verbose == true ]; then
+		echo "CHUNK $chunkNum `date +%H:%M:%S`" >> time
+	fi
+	dd if=$srcFile of=$destDisk seek=$offset bs=$chunkSize 2> tmp 
+	cat tmp | grep MB >> time # > /dev/null 2>&1
+	if [ $verbose == true ]; then
+		echo "chunksLeft = $chunksLeft, offset = $offset"
+	fi
+	chunksLeft=$(($chunksLeft - $numFileChunks))
+	offset=$(($offset + $numFileChunks))
+done
+
+if [ -f tmp ]; then
+	rm tmp
+fi
+
+if [ $verbose == false ]; then
+	rm time
+else
+	echo "Time Stamp for Chunk Writes"
+	cat time
+	rm time
+fi