November 2019
Beginner to intermediate
470 pages
11h 59m
English
Content preview from Mastering PostgreSQL 12 - Third Edition
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Mapping tablespaces
Usually, pg_basebackup can be called directly if we are using an identical filesystem layout on the target system. If this is not the case, pg_basebackup allows you to map the master's filesystem layout to the desired layout:
-T, --tablespace-mapping=OLDDIR=NEWDIR relocate tablespace in OLDDIR to NEWDIR
If your system is small, it could be a good idea to keep everything in one tablespace.
This holds true if I/O is not the problem (maybe because you are only managing a few gigabytes of data).
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