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MXS-359: Allow master changes mid-session

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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.
This commit is contained in:
Markus Mäkelä
2018-03-06 18:58:13 +02:00
parent b18207282d
commit c2341a0003
4 changed files with 46 additions and 4 deletions
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5
server/modules/routing/readwritesplit/readwritesplit.hh
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@ -174,7 +174,8 @@ struct Config
rw_max_slave_conn_percent(0),
max_slave_connections(0),
enable_causal_read(config_get_bool(params, "enable_causal_read")),
causal_read_timeout(config_get_string(params, "causal_read_timeout"))
causal_read_timeout(config_get_string(params, "causal_read_timeout")),
allow_master_change(config_get_bool(params, "allow_master_change"))
{
if (enable_causal_read)
{
@ -201,7 +202,7 @@ struct Config
int max_slave_connections; /**< Maximum number of slaves for each connection*/
bool enable_causal_read; /**< Enable causual read */
std::string causal_read_timeout; /**< Timetout, second parameter of function master_wait_gtid */
bool allow_master_change; /**< Allow changes in master server */
};
/**