Parallel pg_restore unsupported I've used many times this technique for transferring databases between servers:

pg_dump --no-owner -Fd mydb -j 4 -f tmp/mydb
scp -r tmp/mydb otherserver:tmp/


then in the other server:

dropdb --if-exists mydb &amp;&amp; 
createdb -T template0 mydb &amp;&amp; 
pg_restore -j 4 -d mydb tmp/mydb &amp;&amp; 
rm -rf tmp/mydb


It has worked flawlessly.
Using Postgres 9.3.16 and CentOS 7.

But now, in a new server, pg_restore complains:

pg_restore: [archiver] parallel restore is not supported with this archive file format


I could remove the -j 4 parameter, but theorically it should be valid.
According to the pg_restore doc:


  -j number-of-jobs
  --jobs=number-of-jobs
  
  Run the most time-consuming parts of pg_restore — those which load
  data, create indexes, or create constraints — using multiple
  concurrent jobs. This option can dramatically reduce the time to
  restore a large database to a server running on a multiprocessor
  machine.
  
  Each job is one process or one thread, depending on the operating
  system, and uses a separate connection to the server.
  
  The optimal value for this option depends on the hardware setup of the
  server, of the client, and of the network. Factors include the number
  of CPU cores and the disk setup. A good place to start is the number
  of CPU cores on the server, but values larger than that can also lead
  to faster restore times in many cases. Of course, values that are too
  high will lead to decreased performance because of thrashing.
  
  Only the custom and directory archive formats are supported with this
  option. The input must be a regular file or directory (not, for
  example, a pipe). This option is ignored when emitting a script rather
  than connecting directly to a database server. Also, multiple jobs
  cannot be used together with the option --single-transaction.


I'm using the directory format in pg_dump: -Fd !
Why does it complain?
I don't know why, but I have as server Postgres 9.3 and psql, pg_restore and pg_dump belong to version 9.2.

/usr/bin/pg_restore is version 9.2, but /usr/pgsql-9.3/bin/pg_dump is version 9.3.

This is the cause of the problem.

postgresql.x86_64                                     9.2.18-1.el7                                  @base      
postgresql-devel.x86_64                               9.2.18-1.el7                                  @base      
postgresql-libs.x86_64                                9.2.18-1.el7                                  @base      
postgresql-odbc.x86_64                                09.03.0100-2.el7                              @base      
postgresql93.x86_64                                   9.3.17-1PGDG.rhel7                            @pgdg93    
postgresql93-contrib.x86_64                           9.3.17-1PGDG.rhel7                            @pgdg93    
postgresql93-libs.x86_64                              9.3.17-1PGDG.rhel7                            @pgdg93    
postgresql93-server.x86_64                            9.3.17-1PGDG.rhel7                            @pgdg93    


The solution is simply:

yum remove postgresql