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Added new criteria for slave selection: LEAST_ROUTER_CONNECTIONS which causes the servers having least connections from same router to become chosen.

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Added function pointer array which is indexed by enumerated selection criterias.
Selection criteria can now be switched by modifying config file and reloading it.
This commit is contained in:
VilhoRaatikka
2014-05-12 17:03:22 +03:00
parent 25cb08cc29
commit c5ec3cbc57
3 changed files with 122 additions and 48 deletions
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5
utils/skygw_debug.h
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@ -224,6 +224,11 @@ typedef enum skygw_chk_t {
((t) == BE_UNDEFINED ? "BE_UNDEFINED" : \
"Unknown backend tpe")))
#define STRCRITERIA(c) ((c) == UNDEFINED_CRITERIA ? "UNDEFINED_CRITERIA" : \
((c) == LEAST_GLOBAL_CONNECTIONS ? "LEAST_GLOBAL_CONNECTIONS" : \
((c) == LEAST_ROUTER_CONNECTIONS ? "LEAST_ROUTER_CONNECTIONS" : \
((c) == LEAST_BEHIND_MASTER ? "LEAST_BEHIND_MASTER" : "Unknown criteria"))))
#define CHK_MLIST(l) { \
ss_info_dassert((l->mlist_chk_top == CHK_NUM_MLIST && \
l->mlist_chk_tail == CHK_NUM_MLIST), \