Re: memcache for postscreen - concurrent writes?

[Wietse Venema]

Ralf Hildebrandt:
> # postconf proxy_write_maps
> proxy_write_maps = $smtp_sasl_auth_cache_name $lmtp_sasl_auth_cache_name 
> $address_verify_map $postscreen_cache_map ...

Having $postscreen_cache_map there should be sufficient, but I made
a mistake in the proxymap source code. You need to swap some lines
for this to work.

Fixed in the next Postfix snapshot.

        Wietse

*** ./proxymap.c-       Sat Dec 24 17:09:07 2011
--- ./proxymap.c        Wed Dec 28 16:23:14 2011
***************
*** 714,723 ****
        VAR_RCPT_CANON_MAPS, DEF_RCPT_CANON_MAPS, &var_rcpt_canon_maps, 0, 0,
        VAR_RELOCATED_MAPS, DEF_RELOCATED_MAPS, &var_relocated_maps, 0, 0,
        VAR_TRANSPORT_MAPS, DEF_TRANSPORT_MAPS, &var_transport_maps, 0, 0,
-       VAR_PROXY_READ_MAPS, DEF_PROXY_READ_MAPS, &var_proxy_read_maps, 0, 0,
-       VAR_PROXY_WRITE_MAPS, DEF_PROXY_WRITE_MAPS, &var_proxy_write_maps, 0, 0,
        VAR_VERIFY_MAP, DEF_VERIFY_MAP, &var_verify_map, 0, 0,
        VAR_PSC_CACHE_MAP, DEF_PSC_CACHE_MAP, &var_psc_cache_map, 0, 0,
        0,
      };
  
--- 714,724 ----
        VAR_RCPT_CANON_MAPS, DEF_RCPT_CANON_MAPS, &var_rcpt_canon_maps, 0, 0,
        VAR_RELOCATED_MAPS, DEF_RELOCATED_MAPS, &var_relocated_maps, 0, 0,
        VAR_TRANSPORT_MAPS, DEF_TRANSPORT_MAPS, &var_transport_maps, 0, 0,
        VAR_VERIFY_MAP, DEF_VERIFY_MAP, &var_verify_map, 0, 0,
        VAR_PSC_CACHE_MAP, DEF_PSC_CACHE_MAP, &var_psc_cache_map, 0, 0,
+       /* The following two must be last for $mapname to work as expected. */
+       VAR_PROXY_READ_MAPS, DEF_PROXY_READ_MAPS, &var_proxy_read_maps, 0, 0,
+       VAR_PROXY_WRITE_MAPS, DEF_PROXY_WRITE_MAPS, &var_proxy_write_maps, 0, 0,
        0,
      };