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To my knowledge, it is not, no.
The FS must be read/write.
What I would do in this situation is to migrate it to a test/new system where no one can access it and bring it up r/w.
Or set up streaming replication. That gives you select-only. From: pgsql-admin-owner@xxxxxxxxxxxxxx <pgsql-admin-owner@xxxxxxxxxxxxxx> on behalf of xujian <jamesxu@xxxxxxxxxxx>
Sent: Friday, October 7, 2016 2:43 PM To: pgsql-admin@xxxxxxxxxxxxxx Subject: open database on read only file system Hi,
Could you please let me know if it is possible to open database on read-only file system?
I have a psotgresql 9.6 cluster, PGDATA folder is on READ-WRITE volume(system volume), user database is created on a table space which is located on another volume(data volume). Now we set the data volume to read only mode,
before we changed the mode, I also disabled the auto vacuum, run checkpoint,
and vacuum free. We reboot the service, everything was fine until we tried to access the database.
===============
postgres=# \c userdb;
FATAL: could not open file "pg_tblspc/16384/PG_9.6_201608131/16468/2662": Read-only file system
===============
we enabled the debug mode, in log file, we saw
===============
FATAL: 42501: could not open file "pg_tblspc/16384/PG_9.6_201608131/16468/2662": Read-only file system
LOCATION: mdopen, md.c:609
===============
Does anyone know if there is anyway to run database on read-only file system? thanks
James
Journyx, Inc.
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Austin, TX 78757 www.journyx.com p 512.834.8888
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