Empties memcached completely, including flushed keys.

memcache_empty.sh

#!/usr/bin/env bash

# Edit these to your liking
IP="127.0.0.1";
PORT="11211";

# Warn the user
printf "This will flush all keys and delete them as well. This action can NOT be reversed.\\n";
printf "Are you sure you want to do this?\\n";
select answer in "Yes" "No" ; do
  case $answer in
    "Yes" )
      printf "Here we go then...\\n";
      break;
      ;;
    "No" )
      printf "Stopped.\\n";
      exit 1;
      ;;
  esac
done

# First flush all
printf "Attempting flush_all\\n";
printf "======================\\n";
printf "flush_all" | netcat $IP $PORT;

# Get the slabs
printf "Getting slabs and keys\\n";
printf "======================\\n";

# Save $IFS
ORIGINAL_IFS=$IFS;
IFS=$'\n';
SLAB_LINES=$( printf "stats items" | netcat $IP $PORT );

# Declare an associative array (may make this Bash 4 only - not sure)
declare -A SLAB_NUMBERS;

# Get all the slab numbers
for SLAB_LINE in $SLAB_LINES;
do
  if [[ "${SLAB_LINE:0:3}" == "END" ]]; then continue; fi

  SLAB_LINE=${SLAB_LINE##STAT items:};
  SLAB_LINE=${SLAB_LINE%%:*};
  SLAB_NUMBERS[$SLAB_LINE]=1;
done

# Reset $IFS
IFS=$ORIGINAL_IFS;

for SLAB_NUMBER in ${!SLAB_NUMBERS[@]};
do
  printf "Slab %s\\n" $SLAB_NUMBER;
  printf -- "----------------------\\n";

  # Get all the keys in each slab
  IFS=$'\n';
  KEY_LINES=$( printf "stats cachedump %s 0" $SLAB_NUMBER | netcat $IP $PORT );

  for KEY_LINE in $KEY_LINES;
  do
    if [[ "${KEY_LINE:0:3}" == "END" ]]; then continue; fi

    # Delete the key
    KEY_LINE=${KEY_LINE##ITEM };
    KEY_LINE=${KEY_LINE%% [*};
    printf "Deleting %s\\n" $KEY_LINE;
    printf "delete %s" $KEY_LINE | netcat $IP $PORT;
  done
  IFS=$ORIGINAL_IFS;
done

exit 0;