> I'm not aware of any database where I can influence the on-disk order directly


Hello, 

You may want to export your main tables using COPY instead of pg_dump.

Doing this, you could disorder your tables, e.g. with hashtext:

COPY (select * from foo order by hashtext(some_col) )TO <file>

Getting a consistent dump of all your data may be an issue thought...

regards,

Marc Mamin




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