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Re: Volume partitioning (was Re: pgbackrest when data/base is symlinked to another volume)

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Hi Ron

On 9/8/18 4:26 PM, Ron wrote:

Googled "postgresql disk partitioning" and "postgresql volume partitioning" without much success.

Is the best practice volume partitioning:
/Database/9.6/data
/Database/9.6/data/pg_log
/Database/9.6/data/pg_xlog

where /var/lib/pgsql/9.6 (on RHEL6) is a symlink to /Database/9.6/data and PGDATA=/Database/9.6/data

*or *

/Database/9.6/data/base
/Database/9.6/data/pg_log
/Database/9.6/data/pg_xlog

where PGDATA=/var/lib/pgsql/9.6/data and base, pg_log and px_xlog are symlinks to the partitions?

This is really a matter of preference, but simpler is better, so the first one looks better to me.

In general I prefer to keep everything in /var/lib/pgsql/9.6:

/var/lib/pgsql/9.6/data
/var/lib/pgsql/9.6/data/pg_xlog -> /var/lib/pgsql/9.6/wal

Then use the log_directory setting to put logs in:

/var/log/pgsql or /var/lib/pgsql/9.6/log

pgBackRest will expect to be pointed at a real directory (pg-path) and expect the data_directory in PostgreSQL to match.

Regards,
--
-David
david@xxxxxxxxxxxxx




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