diff --git a/install/cobbler.sh b/install/cobbler.sh
index c3041d78..038226ca 100755
--- a/install/cobbler.sh
+++ b/install/cobbler.sh
@@ -218,6 +218,12 @@ fi
 
 # download packages
 cd /var/lib/cobbler/repo_mirror/centos_ppa_repo/
+fastesturl http://mirrors.hustunique.com http://mirror.centos.org
+if [[ "$?" != "0" ]]; then
+    echo "failed to determine the fastest url for downloading centos ppa packages"
+    exit 1
+fi
+read -r PPA_REPO_URL</tmp/url
 centos_ppa_repo_packages="
 ntp-4.2.6p5-1.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENTOS_IMAGE_TYPE,,}.${CENTOS_IMAGE_ARCH}.rpm
 openssh-clients-5.3p1-94.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENTOS_IMAGE_ARCH}.rpm
@@ -227,11 +233,7 @@ wget-1.12-1.8.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENTOS_I
 ntpdate-4.2.6p5-1.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENTOS_IMAGE_TYPE,,}.${CENTOS_IMAGE_ARCH}.rpm
 yum-plugin-priorities-1.1.30-14.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.noarch.rpm"
 for f in $centos_ppa_repo_packages; do
-    if [ "$REGION" == "asia" ]; then
-        download http://mirrors.yun-idc.com/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/os/${CENTOS_IMAGE_ARCH}/Packages/$f $f copy /var/lib/cobbler/repo_mirror/centos_ppa_repo/ || exit $?
-    else
-        download http://mirror.centos.org/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/os/${CENTOS_IMAGE_ARCH}/Packages/$f $f copy /var/lib/cobbler/repo_mirror/centos_ppa_repo/ || exit $?
-    fi
+    download $PPA_REPO_URL/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/os/${CENTOS_IMAGE_ARCH}/Packages/$f $f copy /var/lib/cobbler/repo_mirror/centos_ppa_repo/ || exit $?
 done
 
 centos_ppa_repo_rsyslog_packages="
@@ -320,11 +322,13 @@ fi
 
 # import cobbler distro
 sudo mkdir -p /var/lib/cobbler/iso
-if [ "$REGION" == "asia" ]; then
-    download "$CENTOS_IMAGE_SOURCE_ASIA" ${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso copy /var/lib/cobbler/iso/ || exit $?
-else
-    download "$CENTOS_IMAGE_SOURCE" ${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso copy /var/lib/cobbler/iso/ || exit $?
+fastesturl $CENTOS_IMAGE_SOURCE_ASIA $CENTOS_SOURCE_MIRROR
+if [[ "$?" != "0" ]]; then
+    echo "failed to determine the fastest source for centos iso"
+    exit 1
 fi
+read -r CENTOS_SOURCE</tmp/url
+download "$CENTOS_SOURCE" ${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso copy /var/lib/cobbler/iso/ || exit $?
 sudo mkdir -p /mnt/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}
 if [ $(mount | grep -c "/mnt/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH} ") -eq 0 ]; then
     sudo mount -o loop /var/lib/cobbler/iso/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso /mnt/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}
@@ -337,11 +341,14 @@ if [ $(mount | grep -c "/mnt/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH} ") -eq 0
 else
     echo "/mnt/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH} has already mounted"
 fi
-if [ "$REGION" == "asia" ]; then
-    download "$UBUNTU_IMAGE_SOURCE_ASIA" ${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso copy /var/lib/cobbler/iso/ || exit $?
-else
-    download "$UBUNTU_IMAGE_SOURCE" ${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso copy /var/lib/cobbler/iso/ || exit $?
+
+fastesturl $UBUNTU_IMAGE_SOURCE_ASIA $UBUNTU_IMAGE_SOURCE
+if [[ "$?" != "0" ]]; then
+    echo "failed to determine the fastest source for ubuntu iso"
+    exit 1
 fi
+read -r UBUNTU_SOURCE</tmp/url
+download "$UBUNTU_SOURCE" ${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso copy /var/lib/cobbler/iso/ || exit $?
 sudo mkdir -p /mnt/${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}
 if [ $(mount | grep -c "/mnt/${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH} ") -eq 0 ]; then
     sudo mount -o loop /var/lib/cobbler/iso/${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso /mnt/${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}
diff --git a/install/compass_web.sh b/install/compass_web.sh
index 78435c4d..262860ac 100755
--- a/install/compass_web.sh
+++ b/install/compass_web.sh
@@ -22,11 +22,13 @@ sudo cp -rf $WEB_HOME/v2 /var/www/compass_web/
 if [[ $LOCAL_REPO = "y" ]]; then
     echo "setting up local repo"
     mkdir -p /tmp/repo
-    if [[ "$REGION" == "asia" ]]; then
-        download $LOCAL_REPO_ASIA local_repo.tar.gz unzip /tmp/repo || exit $?
-    else
-        download https://s3-us-west-1.amazonaws.com/compass-local-repo/local_repo.tar.gz local_repo.tar.gz unzip /tmp/repo || exit $?
+    fastesturl $LOCAL_REPO_ASIA $LOCAL_REPO_US
+    if [[ "$?" != "0" ]]; then
+        echo "failed to determine the fastest local repo source"
+        exit 1
     fi
+    read -r LOCAL_REPO_SOURCE</tmp/url
+    download $LOCAL_REPO_SOURCE local_repo.tar.gz unzip /tmp/repo || exit $?
     mv -f /tmp/repo/local_repo/* /var/www/compass_web/v2/
     if [[ "$?" != "0" ]]; then
 	echo "failed to setup local repo"
diff --git a/install/install.conf b/install/install.conf
index 62d3f617..da8b74e6 100755
--- a/install/install.conf
+++ b/install/install.conf
@@ -48,7 +48,7 @@ export CENTOS_IMAGE_VERSION=${CENTOS_IMAGE_VERSION:-"${CENTOS_IMAGE_VERSION_MAJO
 export CENTOS_IMAGE_NAME=${CENTOS_IMAGE_NAME:-"${CENTOS_IMAGE_TYPE}-${CENTOS_IMAGE_VERSION}"}
 export CENTOS_IMAGE_ARCH=${CENTOS_IMAGE_ARCH:-"x86_64"}
 export CENTOS_IMAGE_SOURCE=${CENTOS_IMAGE_SOURCE:-"http://mirror.rackspace.com/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/isos/${CENTOS_IMAGE_ARCH}/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}-minimal.iso"}
-export CENTOS_IMAGE_SOURCE_ASIA=${CENTOS_IMAGE_SOURCE_ASIA:-"http://mirrors.yun-idc.com/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/isos/${CENTOS_IMAGE_ARCH}/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}-minimal.iso"}
+export CENTOS_IMAGE_SOURCE_ASIA=${CENTOS_IMAGE_SOURCE_ASIA:-"http://mirrors.hustunique.com/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/isos/${CENTOS_IMAGE_ARCH}/${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}-minimal.iso"}
 export UBUNTU_IMAGE_TYPE=${UBUNTU_IMAGE_TYPE:-"Ubuntu"}
 export UBUNTU_IMAGE_VERSION_MAJOR=${UBUNTU_IMAGE_VERSION_MAJOR:-"12"}
 export UBUNTU_IMAGE_VERSION_MINOR=${UBUNTU_IMAGE_VERSION_MINOR:-"04"}
@@ -58,7 +58,7 @@ export UBUNTU_IMAGE_NAME=${UBUNTU_IMAGE_NAME:-"${UBUNTU_IMAGE_TYPE}-${UBUNTU_IMA
 export UBUNTU_IMAGE_ARCH=${UBUNTU_IMAGE_ARCH:-"x86_64"}
 export UBUNTU_IMAGE_ARCH_OTHER=${UBUNTU_IMAGE_ARCH_OTHER:-"amd64"}
 export UBUNTU_IMAGE_SOURCE=${UBUNTU_IMAGE_SOURCE:-"http://releases.ubuntu.com/${UBUNTU_IMAGE_VERSION}/${UBUNTU_IMAGE_TYPE,,}-${UBUNTU_IMAGE_VERSION}${UBUNTU_IMAGE_PATCH_VERSION}-server-${UBUNTU_IMAGE_ARCH_OTHER}.iso"}
-export UBUNTU_IMAGE_SOURCE_ASIA=${UBUNTU_IMAGE_SOURCE_ASIA:-"http://mirros.ustc.edu.cn/ubuntu-releases/${UBUNTU_IMAGE_VERSION}/${UBUNTU_IMAGE_TYPE,,}-${UBUNTU_IMAGE_VERSION}${UBUNTU_IMAGE_PATCH_VERSION}-server-${UBUNTU_IMAGE_ARCH_OTHER}.iso"}
+export UBUNTU_IMAGE_SOURCE_ASIA=${UBUNTU_IMAGE_SOURCE_ASIA:-"http://mirrors.ustc.edu.cn/ubuntu-releases/${UBUNTU_IMAGE_VERSION}/${UBUNTU_IMAGE_TYPE,,}-${UBUNTU_IMAGE_VERSION}${UBUNTU_IMAGE_PATCH_VERSION}-server-${UBUNTU_IMAGE_ARCH_OTHER}.iso"}
 
 export COBBLER_PASSWORD=${COBBLER_PASSWORD:-"cobbler"}
 
@@ -84,5 +84,6 @@ export SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
 export COMPASSDIR=${SCRIPT_DIR}/..
 export TESTMODE=${TESTMODE:-"False"}
 
-# Set Local Repo source for Asia
+# Set Local Repo sources
+export LOCAL_REPO_US=${LOCAL_REPO_US:-"https://s3-us-west-1.amazonaws.com/compass-local-repo/local_repo.tar.gz"}
 export LOCAL_REPO_ASIA=${LOCAL_REPO_ASIA:-"http://nj.baidupcs.com/file/5aa212b98c6315fd8c22706c56819aad?bkt=p2-nj-424&fid=2147902224-250528-851286049844289&time=1415230560&sign=FDTAXERB-DCb740ccc5511e5e8fedcff06b081203-Q0KR%2FCMM5y%2B3ha0fXamUW32EywA%3D&to=nb&fm=Nan,B,U,ny&newver=1&newfm=1&flow_ver=3&expires=8h&rt=pr&r=451353717&mlogid=587914427&vuk=2147902224&vbdid=441655319&fin=local_repo.tar.gz"}
diff --git a/install/install.sh b/install/install.sh
index 0d1d4e57..36a75da6 100755
--- a/install/install.sh
+++ b/install/install.sh
@@ -119,6 +119,15 @@ else
 fi
 figlet -ctf slant Compass Installer
 
+# Install bc
+sudo yum -y install bc >& /dev/null
+if [[ "$?" != "0" ]]; then
+    echo "failed to install bc"
+    exit 1
+else
+    echo "bc is installed"
+fi
+
 while [ $1 ]; do
   flags=$1
   param=${flags/'--'/''}
@@ -158,9 +167,6 @@ loadvars()
         done
     fi
 }
-echo -e "\x1b[32mAvailable Regions are asia/america, other REGIONs please use default: america\x1b[37m"
-loadvars REGION "america"
-
 
 loadvars NIC "eth0"
 sudo ifconfig $NIC
diff --git a/install/install_func.sh b/install/install_func.sh
index c8852f5b..8f9aac64 100755
--- a/install/install_func.sh
+++ b/install/install_func.sh
@@ -1,6 +1,24 @@
 #!/bin/bash
 #
 
+fastesturl()
+{
+    shortest=99999
+    fastest_url=""
+    while [ $1 ]; do
+        url=$1
+        short_url=$(echo $url|cut -d '/' -f3)
+        time=`curl -o /dev/null -s -w %{time_total} $short_url`
+        if [ $(echo "$shortest > $time" | bc) -eq 1 ]; then
+            shortest=$time
+            echo "$url" > /tmp/url
+            fastest_url=$url
+        fi
+        shift
+    done
+    echo "$fastest_url is the fastest source, using it"
+}
+
 copy2dir()
 {
     repo=$1
diff --git a/install/prepare.sh b/install/prepare.sh
index b2ef5a04..83a46cac 100755
--- a/install/prepare.sh
+++ b/install/prepare.sh
@@ -213,6 +213,12 @@ else
 fi
 
 # download cobbler related packages
+fastesturl "http://mirrors.hustunique.com" "http://mirror.centos.org"
+if [[ "$?" != "0" ]]; then
+    echo "failed to determine the fastest source for centos ppa rpms"
+    exit 1
+fi
+read -r CENTOS_PPA_SOURCE</tmp/url
 centos_ppa_repo_packages="
 ntp-4.2.6p5-1.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENTOS_IMAGE_TYPE,,}.${CENTOS_IMAGE_ARCH}.rpm
 openssh-clients-5.3p1-94.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENTOS_IMAGE_ARCH}.rpm
@@ -222,11 +228,7 @@ ntpdate-4.2.6p5-1.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.${CENT
 yum-plugin-priorities-1.1.30-14.${CENTOS_IMAGE_TYPE_OTHER}${CENTOS_IMAGE_VERSION_MAJOR}.noarch.rpm"
 
 for f in $centos_ppa_repo_packages; do
-    if [ "$REGION" == "asia" ]; then
-        download http://mirrors.yun-idc.com/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/os/${CENTOS_IMAGE_ARCH}/Packages/$f $f || exit $?
-    else
-        download http://mirror.centos.org/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/os/${CENTOS_IMAGE_ARCH}/Packages/$f $f || exit $?
-    fi
+    download $CENTOS_PPA_SOURCE/${CENTOS_IMAGE_TYPE,,}/${CENTOS_IMAGE_VERSION}/os/${CENTOS_IMAGE_ARCH}/Packages/$f $f || exit $?
 done
 
 centos_ppa_repo_rsyslog_packages="
@@ -248,19 +250,32 @@ download $UBUNTU_CHEF_CLIENT `basename $UBUNTU_CHEF_CLIENT` || exit $?
 download $CHEF_SRV chef-server || exit $?
 
 # download os images
-if [ "$REGION" == "asia" ]; then
-    download "$CENTOS_IMAGE_SOURCE_ASIA" ${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso || exit $?
-    download "$UBUNTU_IMAGE_SOURCE_ASIA" ${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso || exit $?
-else
-    download "$CENTOS_IMAGE_SOURCE" ${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso || exit $?
-    download "$UBUNTU_IMAGE_SOURCE" ${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso || exit $?
+fastesturl $CENTOS_IMAGE_SOURCE $CENTOS_IMAGE_SOURCE_ASIA
+if [[ "$?" != "0" ]]; then
+    echo "failed to determine the fastest source for centos image"
+    exit 1
 fi
+read -r CENTOS_ISO_SOURCE</tmp/url
+download $CENTOS_ISO_SOURCE ${CENTOS_IMAGE_NAME}-${CENTOS_IMAGE_ARCH}.iso || exit $?
+
+fastesturl $UBUNTU_IMAGE_SOURCE $UBUNTU_IMAGE_SOURCE_ASIA
+if [[ "$?" != "0" ]]; then
+    echo "failed to determine the fastest source for ubuntu image"
+    exit 1
+fi
+read -r UBUNTU_ISO_SOURCE</tmp/url
+download $UBUNTU_ISO_SOURCE ${UBUNTU_IMAGE_NAME}-${UBUNTU_IMAGE_ARCH}.iso || exit $?
 
 # download local repo
 if [[ $LOCAL_REPO = "y" ]]; then
-    download https://s3-us-west-1.amazonaws.com/compass-local-repo/local_repo.tar.gz local_repo.tar.gz || exit $?
+    fastesturl $LOCAL_REPO_US $LOCAL_REPO_ASIA
+    if [[ "$?" != "0" ]]; then
+        echo "failed to determine the fastest source for local repo"
+        exit 1
+    fi
+    read -r LOCAL_REPO_SOURCE</tmp/url
+    download $LOCAL_REPO_SOURCE local_repo.tar.gz || exit $?
 fi
-
 # Install net-snmp
 echo "install snmp config"
 if [[ ! -e /etc/snmp ]]; then
diff --git a/install/setup_env.sh b/install/setup_env.sh
index ec3c59b7..36ce72fc 100755
--- a/install/setup_env.sh
+++ b/install/setup_env.sh
@@ -10,6 +10,5 @@ NEXTSERVER=\${NEXTSERVER:-$NEXTSERVER}
 IP_START=\${IP_START:-$IP_START}
 IP_END=\${IP_END:-$IP_END}
 LOCAL_REPO=\${LOCAL_REPO:-$LOCAL_REPO}
-REGION=\${REGION:-$REGION}
 EOF
 chmod ugo+x $SCRIPT_DIR/env.conf