[POSTGRES] Privs d'un ROLE R/W

Exemple de création d'un rôle R/W avec les privileges.

[Postgres] Trouver les schemas

select nspname
from pg_catalog.pg_namespace where nspname not like 'pg%' and nspname <> 'information_schema';

[Postgres] Privilege par user

WITH "names"("name") AS (
  SELECT n.nspname AS "name"
    FROM pg_catalog.pg_namespace n
      WHERE n.nspname !~ '^pg_'
        AND n.nspname <> 'information_schema'
) SELECT "name",
  pg_catalog.has_schema_privilege(current_user, "name", 'CREATE') AS "create",
  pg_catalog.has_schema_privilege(current_user, "name", 'USAGE') AS "usage"
    FROM "names";

Upgrade Casssandra

upgrade.txt

Backup Cassandra

Pour sauvegarde incrémentale: 

 

incremental_backups à true dans le fichier .yaml

 

https://docs.datastax.com/en/cassandra-oss/2.2/cassandra/configuration/configCassandra_yaml.html#configCassandra_yaml__incremental_backups

 

 

backup : 

nodetool -h localhost -p 7199 snapshot mykeyspace

https://docs.datastax.com/en/cassandra-oss/2.2/cassandra/operations/opsBackupTakesSnapshot.html


supprimer backup : 

nodetool -h localhost -p 7199 clearsnapshot

restaurer : 

cp snapshots/1535397029191/* /path/to/keyspace1/standard1/

sstableloader --nodes 172.17.0.2 /var/lib/cassandra/loadme/keyspace1/standard1-f8a4fa30aa2a11e8af27091830ac5256/

https://docs.datastax.com/en/cassandra-oss/3.0/cassandra/operations/opsBackupSnapshotRestore.html

https://docs.datastax.com/en/cassandra-oss/2.2/cassandra/tools/toolsBulkloader.html

Assessment ora2pg

Assessment ora2pg : 
ora2pg -t SHOW_REPORT -c ./config/ora2pg.conf --dump_as_html --cost_unit_value 5 --estimate_cost > ./reports/report.html
ora2pg -t SHOW_TABLE -c ./config/ora2pg.conf > ./reports/tables.txt
ora2pg -t SHOW_COLUMN -c ./config/ora2pg.conf > ./reports/columns.txt

Compare source VS target

ora2pg --type TEST --count_rows --conf confia2pg.conf

Tuning ora2pg

On peut gagner du temps :

1-Si on purge 

2-Si on exclut les tables vides

3-Si on calcule les stats 

4-Si on ajoute de la mémoire chez Oracle

5-Si on utilise les options de parallélisme ora2pg

6-Si on modifie la valeur limite par défaut des données à exporter. 

 

[PostgreSQL] Privilèges

Privs useful to any new user created.

[Postgres] How to Enable / Disable Archive Mode

 

https://orahow.com/enable-disable-archive-mode-in-postgres/

L'extension oracle_fdw

#se connecter au serveur target
psql -U <muyser>
CREATE EXTENSION oracle_fdw;
dew
CREATE SERVER orasrv FOREIGN DATA WRAPPER oracle_fdw (dbserver '<servername>:<port>/<SID>');
des+
GRANT USAGE ON FOREIGN SERVER orasrv TO <muyser>;
CREATE USER MAPPING FOR <muyser> SERVER orasrv OPTIONS ( USER '<oracle_user>', PASSWORD 'xxxx');
deu+
CREATE FOREIGN TABLE ext_<ORATBL> ( id int OPTIONS (key 'true'), name varchar(64), t_data timestamp) SERVER orasrv OPTIONS (SCHEMA '<ORAUSER>' , TABLE '<ORATBL>');

tuto : https://www.postgresql.fastware.com/postgresql-insider-fdw-ora-bas

Pré requis : 
- avoir une VM avec postgresql d'installé sur le meme VLAN qu'une base oracle avec Oracle instantclient-basic, instantclient-devel d'installé
- Ensure that pg_config is in your path, and ORACLE_HOME as well as LD_LIBRARY_PATH are configured
- avoir accès au compte postgres dans la bdd
- avoir accès à une base oracle en sysdba
- The <oracle_user> will obviously need CREATE SESSION privilege and the right to select from the table or view in question.

Bon à savoir : If a NUMBER is converted to a boolean, 0 means false, everything else true.

télécharger l'extension