On 28.06.23 12:46, Laurenz Albe wrote:
On Wed, 2023-06-28 at 15:40 +0530, Pradeep Kumar wrote:
I was under the impression that the --link option would create hard links
between the
old and new cluster's data files, but it appears that the entire old cluster
data was
copied to the new cluster, resulting in a significant increase in the new
cluster's size.
Please provide some numbers, ideally
du -sk <old_data_directory> <new_data_directory>
du -sk ~/pradeep_test/pg_upgrade_testing/postgres_11.4/master
~/pradeep_test/pg_upgrade_testing/postgres_14/new_pg
11224524 /home/test/pradeep_test/pg_upgrade_testing/postgres_11.4/master
41952 /home/test/pradeep_test/pg_upgrade_testing/postgres_14/new_pg
That looks fine. The files exist only once, and the 41MB that only exist in
the new data directory are catalog data and other stuff that is different
on the new cluster.
Interesting, so it actually does count files with multiple hardlinks
only once.
