ceph/src/script/smr_benchmark/linearCopy.sh

   1 #! /bin/bash
   2
   3 # copy a linear file from srcFile to destination disk in a loop until writeSize MBs is written
   4 # destinationDisk is a SMR Host Aware Disk eg. /dev/sdb
   5
   6 if [ "$#" -lt 3 ]; then
   7         echo "Usage ./linearCopy.sh srcFile destinationDisk writeSize(MB)"
   8         exit
   9 fi
  10
  11 if [ "$(id -u)" != "0" ]; then
  12         echo "Please run as sudo user"
  13         exit
  14 fi
  15
  16 srcFile=$1
  17 destDisk=$2
  18 writeSize=$3
  19 verbose=true
  20
  21 if [ -f time ]; then
  22         rm -rf time
  23 fi
  24
  25 #chunkSize=4096 # in bytes
  26 chunkSize=1048576 # in bytes
  27 fileSize=`stat --printf="%s" $srcFile`
  28
  29 numChunksInFile=`echo "$fileSize * (1048576 / $chunkSize)" | bc`
  30 chunksLeft=$(( $(($writeSize * 1048576)) / $chunkSize))
  31
  32
  33 echo "fileSize = $fileSize"
  34
  35 if [ "$(($fileSize % 512))" -ne 0 ]; then
  36         echo "$srcFile not 512 byte aligned"
  37         exit
  38 fi
  39
  40 if [ "$(($chunkSize % 512))" -ne 0 ]; then
  41         echo "$chunkSize not 512 byte aligned"
  42         exit
  43 fi
  44
  45 if [ "$fileSize" -lt "$chunkSize" ]; then
  46         echo "filesize $fileSize should be greater than chunkSize $chunkSize"
  47         exit
  48 fi
  49
  50
  51 numFileChunks=$(($fileSize / $chunkSize))
  52 if [ $verbose == true ]; then
  53         echo "numFileChunks = $numFileChunks"
  54 fi
  55
  56 smrLBAStart=33554432 # TODO query from SMR Drive
  57 #smrLBAStart=37224448
  58
  59 offset=$(( $smrLBAStart / $(( $chunkSize / 512)) ))
  60
  61 if [ $verbose == true ]; then
  62         echo "chunksLeft = $chunksLeft, offset = $offset"
  63 fi
  64
  65 chunkNum=0
  66
  67 while [ "$chunksLeft" -gt 0 ]; do
  68         chunkNum=$(($chunkNum + 1))
  69         if [ $verbose == true ]; then
  70                 echo "CHUNK $chunkNum `date +%H:%M:%S`" >> time
  71         fi
  72         dd if=$srcFile of=$destDisk seek=$offset bs=$chunkSize 2> tmp
  73         cat tmp | grep MB >> time # > /dev/null 2>&1
  74         if [ $verbose == true ]; then
  75                 echo "chunksLeft = $chunksLeft, offset = $offset"
  76         fi
  77         chunksLeft=$(($chunksLeft - $numFileChunks))
  78         offset=$(($offset + $numFileChunks))
  79 done
  80
  81 if [ -f tmp ]; then
  82         rm tmp
  83 fi
  84
  85 if [ $verbose == false ]; then
  86         rm time
  87 else
  88         echo "Time Stamp for Chunk Writes"
  89         cat time
  90         rm time
  91 fi