Hi! We're currently blocking writing queries on standby if even they are modifying contents of foreign tables. But do we have serious reasons for that? Keeping in the mind FDW-sharding, making FDW-tables writable from standby would be good to prevent single-master bottleneck. I wrote simple patch enabling writing to foreign tables from standbys. It works from the first glance for me.
------ Alexander Korotkov Postgres Professional: http://www.postgrespro.com The Russian Postgres Company
standby-fdw-writable.patch
Description: Binary data
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