AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Linux postgresql create database8/13/2023 ![]() This conversion process is called encoding. When data is to be written to a file or passed over the network, it must be converted to bytes. UTF stands for Unicode Transformation Format. We make choices because of the characters they contain, so why utf-8 ? They are character sets, that is, they are character sets that are used to translate every letter and character we press from the keyboard into computer language. ![]() When we come to the definition part, the encoding part catches our eye first. (This is optional, you can not enter a description if you want.) In the comment section, we enter the description. When we do nothing, the postgres user comes up. In the Owner section, we select the database owner, that is, the user who is authorized to do everything in the database. In this window, we specify the database name in the tab that says database. Let’s examine the general tab in the opened window. ![]() Right click on the databases tab under the server we created and select the database tab in the create tab. I explained the connection via pgadmin and the necessary settings to connect in my other article, so I start with creating a database directly without going through it again. Let’s start by creating a database through the database Pg_admin, which is the first method. As I mentioned in the Command Line Database Operations tutorial, we can create a database with the createdb command. Creating a database with the help of psql clientĤ. Creating a database with pl\pgsql via pg_adminģ. There are 4 methods to create the database:Ģ. If you don't or can't touch the postgresqlXX.There are multiple methods and parameters when creating a database. Start and enable the service: # systemctl enable postgresql-10 Initialize the PostgreSQL data directory: # /usr/pgsql-10/bin/postgresql-10-setup initdb Reload systemd: # systemctl daemon-reload To check its content: # cat /etc/systemd/system//nf This will create a /etc/systemd/system//nf file which will be merged with the original service file. Then, customize the systemd service: # systemctl edit rvice This is postgres:postgres and 700): # mkdir -p /pgdata/10/data If you wish to place your data in (e.g.) /pgdata/10/data, create the directory with the good rights ( I must add this is really important: owner and rights. The article is about CentOS 7 with Postgresql 10: I don't know what solution have you adopted finally but if you don't want to have your $PGDATA in the default location in this article you can find how to create a custom $PGDATA. I need to check with our Linux Admin on how the above disk layout can be optimally created without causing any storage bottlenecks. Since the datafiles reside in $PGDATA/base directory, how about creating a disk layout like below using LVM?Ī 50GB filesystem for $PGDATA's top parent directory /db and a separate 500 GB filesystem for $PGDATA/base directory ? ~]# df -Phįilesystem Size Used Avail Use% Mounted on īut, I prefer to have my $PGDATA in a custom location like /db/postgres/pg11/data Since I am in RHEL/Oracle Linux, by default, my $PGDATA will be /var/lib/pgsql/11/data. In the above case, I thought of creating a separate filesystem for datafiles ( /pgdata) and keeping the config files and logs in /db. and place business objects in these tablespaces like this: CREATE TABLE orders (id int, order_item text) tablespace orders_tbs Īnd right from the start I will start creating tablespaces like this: CREATE TABLESPACE orders_tbs LOCATION '/pgdata//orders_tbs' I will initialize the database cluster in the custom location /db/postgres/pg11/data. I will have the following file system mounted with the following sizes: /db -> 50 GB Please let me know if this is a good idea for a PostgreSQL production deployment. In production, the DB will be around 300GB to 400GB in size. I am at the design stage of setting up a production database. OS : RHEL or Oracle Linux 7.6 (Yet to be decided)
0 Comments
Read More
Leave a Reply. |