Postgresql 11’den 12 Sürümüne Nasıl Upgrade İşlemi Yapılır?
Öncelikle Postgresql 12 sürümününün kurulumunun yapılması gerekmektedir. Adımlar aşağıdaki şekildedir:
yum install postgresql12
yum install postgresql12-server
/usr/pgsql-12/bin/postgresql-12-setup initdb
Kurulumu tamamladıktan sonra upgrade'e uygunluk check'i çalıştırılır (Postgresql kullanıcısı ile yapılır. buna ek olarak 11 ve 12 sürümlü veri tabanları kapalı olması gerekmektedir).
/usr/pgsql-12/bin/pg_upgrade --old-datadir=/var/lib/pgsql/11/data --new-datadir=/var/lib/pgsql/12/data --old-bindir=/usr/pgsql-11/bin --new-bindir=/usr/pgsql-12/bin --check
Aşağıdaki gibi bir çıktı vermelidir:
Performing Consistency Checks
-----------------------------
Checking cluster versions ok
Checking database user is the install user ok
Checking database connection settings ok
Checking for prepared transactions ok
Checking for reg* data types in user tables ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for tables WITH OIDS ok
Checking for invalid "sql_identifier" user columns ok
Checking for presence of required libraries ok
Checking database user is the install user ok
Checking for prepared transactions ok
*Clusters are compatible*
Sonrasında --check komutunu kaldırılarak çalıştırılmalıdır böylelikle upgrade işlemi başlamış olur.
usr/pgsql-12/bin/pg_upgrade --old-datadir=/var/lib/pgsql/11/data --new-datadir=/var/lib/pgsql/12/data --old-bindir=/usr/pgsql-11/bin --new-bindir=/usr/pgsql-12/bin
Aşağıdaki şekilde bir çıktı alınmalıdır:
Performing Consistency Checks
-----------------------------
Checking cluster versions ok
Checking database user is the install user ok
Checking database connection settings ok
Checking for prepared transactions ok
Checking for reg* data types in user tables ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for tables WITH OIDS ok
Checking for invalid "sql_identifier" user columns ok
Creating dump of global objects ok
Creating dump of database schemas
ok
Checking for presence of required libraries ok
Checking database user is the install user ok
Checking for prepared transactions ok
If pg_upgrade fails after this point, you must re-initdb the
new cluster before continuing.
Performing Upgrade
------------------
Analyzing all rows in the new cluster ok
Freezing all rows in the new cluster ok
Deleting files from new pg_xact ok
Copying old pg_xact to new server ok
Setting next transaction ID and epoch for new cluster ok
Deleting files from new pg_multixact/offsets ok
Copying old pg_multixact/offsets to new server ok
Deleting files from new pg_multixact/members ok
Copying old pg_multixact/members to new server ok
Setting next multixact ID and offset for new cluster ok
Resetting WAL archives ok
Setting frozenxid and minmxid counters in new cluster ok
Restoring global objects in the new cluster ok
Restoring database schemas in the new cluster
ok
Copying user relation files
ok
Setting next OID for new cluster ok
Sync data directory to disk ok
Creating script to analyze new cluster ok
Creating script to delete old cluster ok
Upgrade Complete
----------------
Optimizer statistics are not transferred by pg_upgrade so,
once you start the new server, consider running:
./analyze_new_cluster.sh
Running this script will delete the old cluster's data files:
./delete_old_cluster.sh
Upgrade sonrasında istemiş olduğu ./analyze_new_cluster.sh ve ./delete_old_cluster.sh dosyalarının çalıştırılması istenmektedir.
-bash-4.2$ ./analyze_new_cluster.sh
This script will generate minimal optimizer statistics rapidly
so your system is usable, and then gather statistics twice more
with increasing accuracy. When it is done, your system will
have the default level of optimizer statistics.
If you have used ALTER TABLE to modify the statistics target for
any tables, you might want to remove them and restore them after
running this script because they will delay fast statistics generation.
If you would like default statistics as quickly as possible, cancel
this script and run:
"/usr/pgsql-12/bin/vacuumdb" --all --analyze-only
vacuumdb: error: could not connect to database template1: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
Done
-bash-4.2$ ./delete_old_cluster.sh
Upgrade işlemi tamamlandı. Artık yeni veri tabanını açıp servisi enable edip, eski veri tabanından gelen verilerinizi kontrol edebilirsiniz.
systemctl enable postgresql-12
systemctl start postgresql-12
Veri tabanı Versiyonu check edilir;
-bash-4.2$ psql -c "SELECT version();"
version
---------------------------------------------------------------------------------------------------------
PostgreSQL 12.1 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39), 64-bit
(1 row)
Veri tabanına bağlantı kurulur.
-bash-4.2$ psql
psql (12.1)
Type "help" for help.
Aşağıda görüleceği üzere eng isimli veri tabanı yeni veri tabanına sorunsuz bir şekilde aktarıldı.
postgres=# l+
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges | Size | Tablespace | Description
-----------+----------+----------+-------------+-------------+-----------------------+---------+------------+-------------------------------
-------------
eng | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 138 MB | pg_default |
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 8209 kB | pg_default | default administrative connect
ion database
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +| 8065 kB | pg_default | unmodifiable empty database
| | | | | postgres=CTc/postgres | | |
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | postgres=CTc/postgres+| 8065 kB | pg_default | default template for new datab
ases
| | | | | =c/postgres | | |
(4 rows)
Herhangi bir tablo kontrol edelim;
eng=# select * from den limit 4
eng-# ;
schemaname | tablename | tableowner | tablespace | hasindexes | hasrules | hastriggers | rowsecurity
------------+------------------+------------+------------+------------+----------+-------------+-------------
pg_catalog | pg_statistic | postgres | | t | f | f | f
pg_catalog | pg_foreign_table | postgres | | t | f | f | f
pg_catalog | pg_authid | postgres | pg_global | t | f | f | f
pg_catalog | pg_user_mapping | postgres | | t | f | f | f
(4 rows)
eng=# select count(*) from den;
count
--------
565248
(1 row)
Yazar: Engin Yılmaz
T.C. Cumhurbaşkanlığı - Savunma Sanayii Başkanlığı himayesinde yürütülmektedir.
