https://github.com/voldemort/voldemort
Tip revision: a4c02983548ce517bf96dd1018b5463db7c5d852 authored by Bhavani Sudha Saktheeswaran on 21 February 2014, 23:03:36 UTC
Releasing voldemort 1.6.8
Releasing voldemort 1.6.8
Tip revision: a4c0298
rebalance-zone-expansion.sh
#!/bin/bash -e
#
# Copyright 2013 LinkedIn, Inc
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# This script generates a cluster.xml and a plan for the zone expansion.
# The final cluster is placed in output_dir/
# Argument = -c current_cluster -s current_stores -i interim_cluster -f final_stores
# -o output dir
# This script uses getopts which means only single character switches are allowed.
# Using getopt would allow for multi charcter switch names but would come at a
# cost of not being cross compatible.
# Function to display usage
usage_and_exit() {
echo "ERROR: $1."
cat <<EOF
Usage: $0 options
OPTIONS:
-h Show this message
-c Current cluster that describes the cluster
-s Current stores that describes the store. If you do not have info about the stores yet, look
under 'voldemort_home/config/tools/' for some store examples.
-i Interim Cluster that corresponds to zone expansion.
-f Final Stores that corresponds to zone expansion.
-o Output dir where all interim and final files will be stored.
EOF
exit 1
}
# initialize variables to an empty string
current_cluster=""
current_stores=""
interim_cluster=""
final_stores=""
output_dir=""
# Figure out voldemort home directory
dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
vold_home="$(dirname "$dir")"
# Parse options
while getopts “hc:s:i:f:o:” OPTION
do
case $OPTION in
h)
usage_and_exit
exit 1
;;
c)
current_cluster=$OPTARG
echo "[rebalance-zone-expansion] Will rebalance on the cluster described in '$current_cluster'."
;;
s)
current_stores=$OPTARG
echo "[rebalance-zone-expansion] Will rebalance on the stores described in '$current_stores'."
;;
i)
interim_cluster=$OPTARG
echo "[rebalance-zone-expansion] Will rebalance on the interim cluster described in '$interim_cluster'."
;;
f)
final_stores=$OPTARG
echo "[rebalance-zone-expansion] Will rebalance on the final stores described in '$final_stores'."
;;
o)
output_dir=$OPTARG
output_dir=$(readlink -m $output_dir)
mkdir -p $output_dir
echo "[rebalance-zone-expansion] Using '$output_dir' for all interim and final files generated."
;;
?)
usage_and_exit
;;
esac
done
if [[ -z $current_cluster ]] || [[ -z $current_stores ]] || [[ -z $interim_cluster ]] \
|| [[ -z $final_stores ]] || [[ -z $output_dir ]]
then
printf "\n"
echo "[rebalance-zone-expansion] Missing argument. Check again."
usage_and_exit
exit 1
fi
if [ ! -e $current_cluster ]; then
usage_and_exit "File '$current_cluster' does not exist."
fi
if [ ! -e $current_stores ]; then
usage_and_exit "File '$current_stores' does not exist."
fi
if [ ! -e $interim_cluster ]; then
usage_and_exit "File '$interim_cluster' does not exist."
fi
if [ ! -e $final_stores ]; then
usage_and_exit "File '$final_stores' does not exist."
fi
# The final cluster.xml for zone expansion is generated in three steps.
# Step 1 : In step 1 1000 separate iterations of the repartitioner is executed and the one
# with the minimal utility value is chose for step 2.
# Step 2: In step 2, the cluster.xml from step 1 is fed to the repartitioner along with random swap
# attempts. The repartitioner randomly swaps the partitions only in zone 2
# and tries to balance the ring.
# Step 3: Finally, a plan is generated on how to reach from the orignal cluster topology to
# the one that is generated in step 2.
#
step2_zoneid=2
step2_swap_attempts=1000
step2_overall_iterations=5
# Step 1
for i in {1..1000}
do
mkdir -p $output_dir/step1/$i
$vold_home/bin/run-class.sh voldemort.tools.RepartitionerCLI \
--current-cluster $current_cluster \
--current-stores $current_stores \
--interim-cluster $interim_cluster \
--final-stores $final_stores \
--attempts 1 \
--output-dir $output_dir/step1/$i
done
#find the run with the best (minimal) utility value
bestUtil="$(grep "Utility" $output_dir/step1/*/final-cluster.xml.analysis | sort -nk 3 | head -n 1 | cut -f1 -d ' ')"
remove=".analysis:Utility"
path_to_bestUtil=${bestUtil%%$remove}
if [ ! -e $path_to_bestUtil ]; then
usage_and_exit "final cluster.xml from step1 does not exist"
fi
# Step 2
$vold_home/bin/run-class.sh voldemort.tools.RepartitionerCLI \
--current-cluster $path_to_bestUtil \
--current-stores $final_stores \
--output-dir $output_dir/step2 \
--enable-random-swaps \
--random-swap-zoneids $step2_zoneid \
--attempts $step2_overall_iterations \
--random-swap-attempts $step2_swap_attempts \
# Step 3
mkdir -p $output_dir/step3/
$vold_home/bin/run-class.sh voldemort.tools.RebalancePlanCLI \
--current-cluster $current_cluster \
--current-stores $current_stores \
--final-cluster $output_dir/step2/final-cluster.xml \
--final-stores $final_stores \
--output-dir $output_dir/step3/
echo "[rebalance-zone-expansion] Placing final-cluster.xml in '$output_dir'"
cp $output_dir/step3/final-cluster.xml $output_dir/final-cluster.xml
echo "[rebalance-zone-expansion] Placing plan.out in '$output_dir'"
cp $output_dir/step3/plan.out $output_dir/plan.out
echo "[rebalance-zone-expansion] Placing final-cluster.xml.analysis in '$output_dir'"
cp $output_dir/step2/final-cluster.xml $output_dir/final-cluster.xml.analysis