Attachment 5956 Details for Bug 7670 – test script that demonstrates the bug

test script that demonstrates the bug

hardLinkCopyTest.sh (text/plain), 5.32 KB, created by Dave Yost on 2010-09-09 19:40:59 UTC

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Creator: Dave Yost

Created: 2010-09-09 19:40:59 UTC

Size: 5.32 KB

patch

obsolete

>#!/bin/bash
>
>makelinks() { (
>  local volume=$1
>  local file=$2  # ignored in this version
>  echostep Making as many links as possible on $volume
>  # Iterate until the ln command fails
>  set -e
>  cd $volume
>  mkdir -p links
>  for a in 0 1 2 3 4 5 6 7 8 9 ; do
>    for b in 0 1 2 3 4 5 6 7 8 9 ; do
>      echo making 10,000 pairs of hard-linked files ...
>      mkdir -p links/$a$b
>      for c in 0 1 2 3 4 5 6 7 8 9 ; do
>        for d in 0 1 2 3 4 5 6 7 8 9 ; do
>          mkdir -p links/$a$b/$c$d
>          for e in 0 1 2 3 4 5 6 7 8 9 ; do
>            for f in 0 1 2 3 4 5 6 7 8 9 ; do
>              file=links/$a$b/$c$d/$e$f
>              touch ${file}a
>              ln    ${file}a ${file}b
>            done
>          done
>        done
>      done
>    done
>  done
>) }
>
>makelinksAllToOneFile() { (
>  local volume=$1
>  local file=$2
>  echostep Making as many links as possible on $volume
>  # Iterate until the ln command fails
>  set -e
>  cd $volume
>  mkdir -p links
>  for a in 0 1 2 3 4 5 6 7 8 9 ; do
>    for b in 0 1 2 3 4 5 6 7 8 9 ; do
>      echo making 10,000 hard links ...
>      mkdir -p links/$a$b
>      for c in 0 1 2 3 4 5 6 7 8 9 ; do
>        for d in 0 1 2 3 4 5 6 7 8 9 ; do
>          mkdir -p links/$a$b/$c$d
>          for e in 0 1 2 3 4 5 6 7 8 9 ; do
>            for f in 0 1 2 3 4 5 6 7 8 9 ; do
>              ln -f $file links/$a$b/$c$d/$e$f
>            done
>          done
>        done
>      done
>    done
>  done
>) }
>
>createRamVolume() {
>  #!/bin/sh
>  # Copyright 2008 DIGLLOYD INC
>  #
>  # constants for crd (create ram disk)
>  # Copyright 2008 DIGLLOYD INC
>  #
>  # http://macperformanceguide.com/Mac-HowToUseARAMDisk.html
>  # original name is crd; modify time 2010-01-19.12:19:59
>
>  # minimum allowed size
>  MIN_MB=32
>  
>  # maximum allowed size
>  MAX_MB=60000
>  
>  # base name for ram disks
>  VOLUME_NAME_BASE=RamDisk
>  
>  echo ""
>  echo "Copyright 2010, DIGLLOYD INC. All Rights Reserved"
>  echo "See our performance tools at http://macperformanceguide.com/Software-Main.html"
>  echo ""
>  echo "This script is designed for Mac OS X Snow Leopard 10.6.x only!."
>  echo "Do not use it with OS X Leopard (10.5) or earlier."
>  echo "..."
>  echo ""
>  
>  PROG_NAME=$0
>  EXAMPLE="${PROG_NAME}  4096 RamDisk1"
>  
>  if [ -n "$3" ]; then 
>      echo Too many arguments.  Specify size in MB then volume name. Example:
>      echo $EXAMPLE
>      exit
>  fi
>  
>  if [ -z "$2" ]; then
>      echo Specify size in MB then volume name. Example:
>      echo $EXAMPLE
>      exit
>  fi
>  
>  if [ -z "$1" ]; then
>     echo Specify size in MB then volume name. Example:
>     echo $EXAMPLE
>     exit
>  fi
>  
>  
>  MB_SIZE=$1
>  DISK_NAME=$2
>  
>  if [ ${MB_SIZE} -lt ${MIN_MB} ]; then
>     echo RAM disk size minimum ${MIN_MB}MB, maximum ${MAX_MB}MB.
>     echo $EXAMPLE
>     exit
>  fi
>  
>  if [ ${MB_SIZE} -gt ${MAX_MB} ]; then
>     echo RAM disk size minimum ${MIN_MB}MB, maximum ${MAX_MB}MB.
>     echo $EXAMPLE
>     exit
>  fi
>  
>  
>  if [ -e /Volumes/$DISK_NAME ]; then
>     echo Volume \"$DISK_NAME\" already exists, to unmount use: hdiutil detach /Volumes/$DISK_NAME
>     exit
>  fi
>  
>  
>  BLOCKS=${MB_SIZE}
>  let "BLOCKS *= 2048"
>  
>  echo Creating ${MB_SIZE} MB ram disk named ${DISK_NAME}
>  echo hdid -nomount ram://$BLOCKS
>  CREATED_RAMDISK=`hdid -nomount ram://$BLOCKS`
>  
>  echo New block device: ${CREATED_RAMDISK}
>  #DISK_NAME=`basename ${CREATED_RAMDISK}`
>  
>  echo Creating volume named: ${DISK_NAME}
>  newfs_hfs -v ${DISK_NAME} /dev/$CREATED_RAMDISK
>  
>  echo Mounting in /Volumes/${DISK_NAME}
>  #mkdir /Volumes/${DISK_NAME}
>  diskutil mount ${CREATED_RAMDISK}
>  
>  open -a Finder /Volumes/$DISK_NAME
>  
>  echo ""
>  echo "RamDisk '${DISK_NAME}' created, ${MB_SIZE}MB"
>}
>
>createVolume() { (
>  local name=$1
>  local volume=/Volumes/$name
>  echostep Creating and mounting $volume
>  if [[ ! -e $volume ]] ; then
>    createRamVolume 32 $name
>    return 1
>  else
>    echo $volume already exists.
>    return 0
>  fi
>) }
>
>clearVolume() {
>  local name=$1
>  if [[ -z $name ]] ; then
>    echo dangerous bug, exiting
>    exit 2
>  fi
>  local volume=/Volumes/$name
>  shopt -u nullglob
>  files=$(echo $volume/*)
>  if [[ "$files" != $volume/'*' ]] ; then
>    echo "Removing $volume/*"
>    rm -rf $volume/*
>  fi
>}
>
>numberOfFiles() {
>  local volume=$1
>  echostep "Number of files on $volume: "
>  find $volume -type f | lines
>}
>
>lines() {
>  wc | awk '{ print $1}'
>}
>
>echodo() {
>  eval "echo-command $@"
>  eval "$@"
>}
>
>echo-command() {
>  echo -n "[ "
>  echo -n    $@
>  echo        " ]"
>}
>
>echostep() {
>  echo
>  echo '========' "$@"
>}
>
>#===============================================================================
>
>sourceName=LottaLinks ; source=/Volumes/$sourceName
>destName=Copy         ;   dest=/Volumes/$destName
>
>echostep "Test copying lots of hard links"
>echo "
>Make two minimal-sized ram disks, '$source' and '$dest'.
>Populate $source with as many hard links sharing a single file as possible.
>Copy $source to $dest.
>See if it worked properly."
>
>if ! createVolume $sourceName ; then
>  echostep Populate the source volume
>  filename=sleep
>  rsync -a /bin/$filename $source
>  makelinks $source $filename
>fi
>
>createVolume $destName
>
>numberOfFiles $source
>
>for x in \
>     "/usr/bin/rsync -a --hard-links"
>#     "/Local/Software/CCC/rsync -a --hard-links" \
>#     "/usr/local/bin/rsync -a --hard-links"
>#     ditto
>do
>  echostep "Clear volume $dest"
>  clearVolume $destName
>
>  echostep Copy using $x
>  echodo $x $source/ $dest
>
>  numberOfFiles $dest
>done

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Attachments on bug 7670: 5956