I'm currently upgrading a Posgresql 7.3.2 database to a 8.1.<something-good>
I'd run pg_dump | gzip > sqldump.gz on the old system. That took about 30 hours and gave me an 90GB zipped file. Running cat sqldump.gz | gunzip | psql into the 8.1 database seems to take about the same time. Are there any tricks I can use to speed this dump+restore process up?
was the last restore successfull ? if so why do you want to repeat ?
some tips
1. run new version of postgres in a different port and pipe pg_dump to psql this may save the CPU time of compression , there is no need for a temporary dump file.
pg_dump | /path/to/psql813 -p 54XX newdb
2. use new version of pg_dump to dump the old database as new version is supposed to be wiser.
3. make sure you are trapping the restore errors properly psql newdb 2>&1 | cat | tee err works for me.
The database contains quite alot of BLOB, thus the size.