PostgreSQL数据库的备份与恢复

/usr/lib/postgresql/8.2/bin/pg_dump -D -h localhost -U user mydb >  mydb.bak

/usr/lib/postgresql/8.2/bin/createdb mydb 
 
/usr/lib/postgresql/8.2/bin/psql -h localhost -U user -d mydb < mydb.bak

pg_dump dbname | split -b 1m - filename

cat filename* | psql dbname