# Postgres-XL

https://www.postgres-xl.org

https://www.postgres-xl.org/documentation/install-short.html
https://www.postgres-xl.org/documentation/install-procedure.html

# Set up 9 servers

Data nodes:
pgxl1
pgxl2
pgxl3
pgxl4
pgxl5

GTM:
pgxl-gtm-1
pgxl-gtm-2

Coordinators:
pgxl-coord-1
pgxl-coord-2
pgxl-coord-3


# Set up SSH between hosts

ssh-keygen -t ed25519
set up root ssh between all nodes

# /etc/hosts
set up /etc/hosts with all cluster name/IPs.

Set up /etc/hosts with all cluster name/IPs for Postgres interface, with pg- prefix


# Get source
Binary:
wget https://www.postgres-xl.org/downloads/postgres-xl-10r1.tar.gz

Git (better):
git clone https://git.postgresql.org/git/postgres-xl.git

# Install Dependencies
apt install build-essential bison flex libreadline-dev zlib1g-dev

# Build
git checkout remotes/origin/XL_10_STABLE

mkdir build_dir
cd build_dir
../configure
make -j8
sudo make install

# Configure
adduser postgres

Run this as root:
/sbin/ldconfig /usr/local/pgsql/lib

XXX no?
Add this to ~/.bashrc
LD_LIBRARY_PATH=/usr/local/pgsql/lib
export LD_LIBRARY_PATH

Add this to ~/.bashrc
PATH=/usr/local/pgsql/bin:$PATH
export PATH

XXX set up user postgres to ssh to all nodes ?

https://www.postgres-xl.org/documentation/pgxc-ctl.html

Run:
pgxc_ctl
At PGXC promt run:
prepare config empty


add gtm master name host port dir
add gtm slave name host port dir
add gtm_proxy name host port dir
add coordinator master name host port pooler dir< extraServerConf extraPgHbaConf
add coordinator slave name host port pooler dir archDir
add datanode master name host port pooler dir waldir extraServerConf extraPgHbaConf
add datanode slave name host port pooler dir waldir archDir



XLDIR=/usr/local/pgsql/
pgxc_ctl prepare config empty
pgxc_ctl add gtm master gtm_1 pg-pgxl-gtm-1 20001 "$XLDIR/gtm"
XXX slave or proxy?
pgxc_ctl add gtm slave  gtm_2 pg-pgxl-gtm-2 20002 "$XLDIR/gtm"
pgxc_ctl add gtm_proxy  gtm_2 pg-pgxl-gtm-2 20002 "$XLDIR/gtm"
pgxc_ctl add coordinator master coord_1 pg-pgxl-coord-1 30001 31001 "$XLDIR/coord-1" none none
XXX master or slaves?
pgxc_ctl add coordinator master coord_2 pg-pgxl-coord-2 30002 31002 "$XLDIR/coord-2" none none
pgxc_ctl add coordinator master coord_3 pg-pgxl-coord-3 30003 31003 "$XLDIR/coord-3" none none
pgxc_ctl add datanode master datanode_1 pg-pgxl1 40001 41001 "$XLDIR/data-1" none none none
XXX master or slaves?
pgxc_ctl add datanode master datanode_2 pg-pgxl2 40001 41001 "$XLDIR/data-2" none none none
pgxc_ctl add datanode master datanode_3 pg-pgxl3 40001 41001 "$XLDIR/data-3" none none none
pgxc_ctl add datanode master datanode_4 pg-pgxl4 40001 41001 "$XLDIR/data-4" none none none
pgxc_ctl add datanode master datanode_5 pg-pgxl5 40001 41001 "$XLDIR/data-5" none none none
pgxc_ctl monitor all createdb -p 30001 test


# Open Up firewall.


# OmniDB
git clone https://github.com/OmniDB/OmniDB

# Notes
Maybe add build dependency python3-dev (?) for PL/Python shared library.
Maybe gettext.
Maybe OpenSSL.
XXX change prefix ?