MXS-359: Allow master changes mid-session

With the `allow_master_change` parameter enabled, sessions can start using a different master node if one is available. This will not prevent sessions from closing if a write query is received while no master replacement is available.
2018-03-06 18:58:13 +02:00
parent b18207282d
commit c2341a0003
4 changed files with 46 additions and 4 deletions
--- a/server/modules/routing/readwritesplit/readwritesplit.cc
+++ b/server/modules/routing/readwritesplit/readwritesplit.cc
@ -1507,6 +1507,7 @@ MXS_MODULE *MXS_CREATE_MODULE()
            {"connection_keepalive", MXS_MODULE_PARAM_COUNT, "0"},
            {"enable_causal_read", MXS_MODULE_PARAM_BOOL, "false"},
            {"causal_read_timeout", MXS_MODULE_PARAM_STRING, "0"},
+            {"allow_master_change", MXS_MODULE_PARAM_BOOL, "false"},
            {MXS_END_MODULE_PARAMS}
        }
    };