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Previously pg_rewind did not fsync any files. That's problematic, given that the target directory is modified. If the database was started afterwards, 2ce439f33 luckily already caused the data directory to be synced to disk at postmaster startup; reducing the scope of the problem. To fix, use initdb -S, at the end of the pg_rewind run. It doesn't seem worthwhile to duplicate the code into pg_rewind, and initdb -S is already used that way by pg_upgrade. Reported-By: Andres Freund Author: Michael Paquier, somewhat edited by me Discussion: 20160310034352.iuqgvpmg5qmnxtkz@alap3.anarazel.de CAB7nPqSytVG1o4S3S2pA1O=692ekurJ+fckW2PywEG3sNw54Ow@mail.gmail.com Backpatch: 9.5, where pg_rewind was introduced
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.