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interim commit

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This commit is contained in:
Ian Barwick
2017-06-28 18:20:03 +09:00
parent f4e8bf891d
commit d6b6255144
4 changed files with 48 additions and 9 deletions
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41
dbutils.c
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@@ -2288,7 +2288,8 @@ get_voting_status(PGconn *conn)
return voting_status;
}
int request_vote(PGconn *conn, int this_node_id, int this_node_priority, XLogRecPtr last_wal_receive_lsn)
int
request_vote(PGconn *conn, t_node_info *this_node, t_node_info *other_node, XLogRecPtr last_wal_receive_lsn)
{
PQExpBufferData query;
PGresult *res;
@@ -2298,7 +2299,7 @@ int request_vote(PGconn *conn, int this_node_id, int this_node_priority, XLogRec
appendPQExpBuffer(&query,
"SELECT repmgr.request_vote(%i, '%X/%X'::pg_lsn)",
this_node_id,
this_node->node_id,
(uint32) (last_wal_receive_lsn >> 32),
(uint32) last_wal_receive_lsn);
@@ -2311,7 +2312,41 @@ int request_vote(PGconn *conn, int this_node_id, int this_node_priority, XLogRec
log_debug("XXX lsn_diff %i", lsn_diff);
PQclear(res);
return lsn_diff;
/* we're ahead */
if (lsn_diff > 0)
{
log_debug("this node is ahead");
return 1;
}
/* other node is ahead */
if (lsn_diff < 0)
{
log_debug("other node is ahead");
return 0;
}
/* tiebreak */
/* we're higher priority */
if (this_node->priority > other_node->priority)
{
log_debug("this node has higher priority");
return 1;
}
/* still tiebreak - decide by node_id */
if (this_node->node_id < other_node->node_id)
{
log_debug("this node has lower id");
return 1;
}
log_debug("other node wins");
/* we lose */
return 0;
}