These instructions will help you connect BellaDati application to a PostgreSQL database.
We recommend using database engines PostgreSQL 9.4 4 or PostgreSQL 9.5.
Starting BellaDati version 22.214.171.124 PostgreSQL 9.6 database engine is tested and recommended too.
Create and Configure the PostgreSQL Database
|title||Setup the pg_hba.conf file to allow accessing the database via TCP socket. Here is an example:|
host belladati_db belladati_dbuser 0.0.0.0/0 md5
Create a database user which BellaDati will connect as (e.g.
belladati_dbuser). Remember this database user name, as it will be used to configure BellaDati's connection to this database in subsequent steps. Do not forget to configure the
pg_hba.conf file, which controls the database access.
$ createuser -SDRPsDRP belladati_dbuser
Create a database for BellaDati to be used as data warehouse (e.g.
belladati_db) with Unicode collation.
CREATE DATABASE belladati_db WITH ENCODING 'UNICODE' TEMPLATE template0;
Or from the command-line:
$ createdb -E UNICODE -O belladati_dbuser belladati_db -T template0
- Ensure that the user has permissions to connect to the database, and to create and write to tables in the database.
Check if your database has the plpgsql language. If not, you can define it using this command:
CREATE LANGUAGE plpgsql
Or from the command line:
$ createlang -U belladati_dbuser plpgsql belladati_db
When using the default PostgreSQL configuration file
pg_hba.conf, you have to execute this command by connecting via TCP socket:
createlang -h 127.0.0.1 -U belladati_dbuser plpgsql belladati_db
Remember the database name; it will be used to configure BellaDati's connection to the database in subsequent steps.
We strongly recommend performing the following PostgreSQL configuration changes in
$POSTGRES_HOME/data/postgresql.conf. This example specifies parameters when you run the BellaDati application and database on a single server with 4GB memory. 2GB are allocated for the BellaDati application server running on Java (using the -Xmx parameter). The rest should be available for the operating system and database server.
This configuration may change according to real usage needs.
Example below shows the minimal configuration for single server installation.
|Sets the maximum number of concurrent connections.|
|Sets the number of shared memory buffers used by the server.|
min 1/4 RAM, 1/2 RAM recommended
|Sets the maximum number of temporary buffers used by each session.|
|Sets the maximum memory to be used for query workspaces.|
min 16MB, RAM / 128 recommended
|Sets the maximum memory to be used for maintenance operations.|
min 64MB, RAM / 32 recommeneded
|Sets the maximum stack depth, in kilobytes.|
|Sets the number of disk-page buffers in shared memory for WAL.|
|Sets the planner's assumption about the size of the disk cache.|
|Sets the type of statements logged.|
|autovacuum||on||Starts the autovacuum subprocess.|| |
|autovacuum_analyze_scale_factor||0.05||Number of tuple inserts, updates, or deletes prior to analyze as a fraction of reltuples.|| |
|autovacuum_analyze_threshold||10||Minimum number of tuple inserts, updates, or deletes prior to analyze.|| |
|autovacuum_freeze_max_age||200000000||Age at which to autovacuum a table to prevent transaction ID wraparound.|| |
|autovacuum_max_workers||5||Sets the maximum number of simultaneously running autovacuum worker processes.|| |
|autovacuum_multixact_freeze_max_age||400000000||Multixact age at which to autovacuum a table to prevent multixact wraparound.|| |
|autovacuum_naptime||15s||Time to sleep between autovacuum runs.|| |
|autovacuum_vacuum_cost_delay||10ms||Vacuum cost delay in milliseconds, for autovacuum.|| |
|autovacuum_vacuum_cost_limit||1000||Vacuum cost amount available before napping, for autovacuum.|| |
|autovacuum_vacuum_scale_factor||0.1||Number of tuple updates or deletes prior to vacuum as a fraction of reltuples.|| |
|autovacuum_vacuum_threshold||25||Minimum number of tuple updates or deletes prior to vacuum.|| |
We recommend set the
archive_mode parameter to
off, using the
pg_dump command instead.
Backup and restore
You can backup the BellaDati database using the PostgreSQL dump command:
pg_dump -U user -F c -v -f "path_to_dump/dump.backup" belladati_db
To restore a backup, use the
pg_restore -v -c -O -d belladati_db -U user path_to_dump/dump.backup
Installing BellaDati on Linux - continue Installing BellaDati on Linux, step "check that default ports"
continue installing the BellaDati.war application on your application server as described in: