11Feb/101
Restore from mysqldump --all-databases in parallel
csplit backup.sql /"^-- Current Database"/ {*}; for f in xx*; do cat xx00 "$f" | mysql& done;
and then rm xx* when the background jobs have finished.
I haven't done any benchmarking, and I haven't worked out what to do if the number of databases exceeds the number of available connections.
February 11th, 2010 - 22:07
It is unlikely that you want to have so many connections running that the instance would hit max_connections. I suggest reading the notes pgrestore’s -j option ( http://www.postgresql.org/docs/8.4/static/app-pgrestore.html )
Have you considered mk-parallel-dump and mk-parallel-restore ?