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MXS-1845 New algorithm for finding the master server

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Not yet used, as more is needed to replace the old code. The
algorithm is based on counting the total number of slave nodes
a server has, possibly in multiple layers and/or cycles.
This commit is contained in:
Esa Korhonen
2018-06-05 18:17:29 +03:00
parent 8094c67ac2
commit 3f82c25c62
5 changed files with 247 additions and 21 deletions
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18
server/modules/monitor/mariadbmon/mariadbserver.cc
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@ -56,21 +56,27 @@ MariaDBServer::MariaDBServer(MXS_MONITORED_SERVER* monitored_server)
NodeData::NodeData()
: index(INDEX_NOT_VISITED)
, lowest_index(INDEX_NOT_VISITED)
, cycle(INDEX_NOT_VISITED)
, in_stack(false)
, cycle(CYCLE_NONE)
, reach(REACH_UNKNOWN)
{}
void NodeData::reset()
void NodeData::reset_results()
{
index = INDEX_NOT_VISITED;
lowest_index = INDEX_NOT_VISITED;
cycle = INDEX_NOT_VISITED;
in_stack = false;
cycle = CYCLE_NONE;
reach = REACH_UNKNOWN;
parents.clear();
children.clear();
external_masters.clear();
}
void NodeData::reset_indexes()
{
index = INDEX_NOT_VISITED;
lowest_index = INDEX_NOT_VISITED;
in_stack = false;
}
int64_t MariaDBServer::relay_log_events()
{
/* The events_ahead-call below ignores domains where current_pos is ahead of io_pos. This situation is