Deepgreen DB

Install

The file you downloaded is a .bin file that can be executed directly with bash.

Execute the .bin script to install Deepgreen DB:

% bash THE-BIN-FILE-YOU-DOWNLOADED

The installation script will install the Deepgreen DB in the current directory and create a simple symlink deepgreendb to point to it.

---

Setting OS Parameters

IMPORTANT: Make sure your OS parameters are set properly according to this page.

Initializing the DB

To verify that the installation was successful, we will create an instance and start the service.

% # Source the env
% source deepgreendb/greenplum_path.sh

% # Make sure we can ssh to localhost without passwords
% gpssh-exkeys -h localhost

% # Create data directories for master and 2 segments
% sudo mkdir /dbfast{0,1,2}
% sudo chown $USER /dbfast{0,1,2}

% # Create the hostfile
% echo localhost > hostfile

% # Create cluster.conf file
% cat > cluster.conf <<HEREHERE

ARRAY_NAME="mpp1 cluster"
CLUSTER_NAME="mpp1 cluster"
MACHINE_LIST_FILE=hostfile
SEG_PREFIX=dg
DATABASE_PREFIX=dg
PORT_BASE=25432
declare -a DATA_DIRECTORY=(/dbfast1 /dbfast2)
MASTER_HOSTNAME=localhost
MASTER_DIRECTORY=/dbfast0
MASTER_PORT=15432
IP_ALLOW=0.0.0.0/0
TRUSTED_SHELL=/usr/bin/ssh
CHECK_POINT_SEGMENTS=8
ENCODING=UNICODE
export MASTER_DATA_DIRECTORY
export TRUSTED_SHELL
DEFAULT_QD_MAX_CONNECT=25
QE_CONNECT_FACTOR=5

HEREHERE

% # Finally, run gpinitsystem
% gpinitsystem -c cluster.conf -h hostfile

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Now We Can Have Some Fun

Let’s run some tests!

% # Source the env if this is a new shell
% source deepgreendb/greenplum_path.sh

% # We set up the DB on port 15432
% export PGPORT=15432

% # Create Test DB
% createdb test

% psql test
test=# create table tt as
select i::bigint as i, i::double precision as f
from generate_series(1, 1000000) i
distributed by (i);
SELECT 1000000
test=# show vitesse.version;
         vitesse.version
------------------------------------------------
Deepgreen DB 16.05 [rev 2c302da on 2016-05-08]
(1 row)

test=# \timing on
Timing is on.
test=# set vitesse.enable=0;
SET
Time: 1.799 ms
test=# select count(*), sum(i), avg(i) from tt;
count  |     sum      |   avg
---------+--------------+----------
1000000 | 500000500000 | 500000.5
(1 row)

Time: 439.994 ms
test=# set vitesse.enable=1;
SET
Time: 1.814 ms
test=# select count(*), sum(i), avg(i) from tt;
count  |     sum      |   avg
---------+--------------+----------
1000000 | 500000500000 | 500000.5
(1 row)

Time: 16.965 ms
test=# select 439/17;
?column?
----------
25
(1 row)

Time: 2.577 ms
test=#