diff --git a/site-modules/profile/manifests/postgresql/backup.pp b/site-modules/profile/manifests/postgresql/backup.pp
--- a/site-modules/profile/manifests/postgresql/backup.pp
+++ b/site-modules/profile/manifests/postgresql/backup.pp
@@ -1,8 +1,8 @@
 class profile::postgresql::backup {
 	include profile::postgresql::client
 
-	$pg_backup_user = %{hiera('swh::deploy::db::pgbouncer::user::login')}
-	$pg_backup_password = %{hiera('swh::deploy::db::pgbouncer::user::password')}
+	$pg_backup_user = lookup('swh::deploy::db::pgbouncer::user::login')
+	$pg_backup_password = lookup('swh::deploy::db::pgbouncer::user::password')
 
 	file { '/usr/local/bin/pg_cluster_backup.sh':
 		ensure	=> file,
diff --git a/site-modules/profile/templates/swh/pg_cluster_backup.sh.erb b/site-modules/profile/templates/swh/pg_cluster_backup.sh.erb
--- a/site-modules/profile/templates/swh/pg_cluster_backup.sh.erb
+++ b/site-modules/profile/templates/swh/pg_cluster_backup.sh.erb
@@ -1,6 +1,9 @@
 #!/bin/sh
 
+TARGET_DIR=/srv/storage/space/postgres_secondary
+
 # banco has many *slow* CPU cores
+# A full backup of the secondary cluster takes ~= 40 minutes with p=3 and c=1
 PARALLELISM=3
 COMPRESSION=1