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Make better state transition choices in AP mode

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Scott Lystig Fritchie 2015-09-11 19:14:41 +09:00
parent 68f1ff68ee
commit fe8ff6033d
1 changed files with 45 additions and 4 deletions
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49
src/machi_chain_manager1.erl
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@ -1501,13 +1501,54 @@ react_to_env_A50(P_latest, FinalProps, #ch_mgr{proj=P_current}=S) ->
{{no_change, FinalProps, P_current#projection_v1.epoch_number}, S}.
react_to_env_B10(Retries, P_newprop, P_latest, LatestUnanimousP,
_AmHosedP, Rank_newprop, Rank_latest, #ch_mgr{name=MyName}=S) ->
_AmHosedP, Rank_newprop, Rank_latest,
#ch_mgr{name=MyName, consistency_mode=CMode,
proj=P_current}=S) ->
?REACT(b10),
if _AmHosedP -> io:format(user, "B10: ~w: AmHosedP\n", [MyName]); true -> ok end,
?REACT({b10,?LINE,[{newprop_epoch,P_newprop#projection_v1.epoch_number}]}),
P_current_upi = if is_record(P_current, projection_v1) ->
P_current#projection_v1.upi;
true ->
[]
end,
#projection_v1{author_server=P_latest_author, upi=P_latest_upi,
repairing=P_latest_repairing} = P_latest,
I_am_in_P_latest_upi = lists:member(MyName, P_latest_upi),
I_am_in_P_latest_repairing = lists:member(MyName, P_latest_repairing),
IsRelevantToMe_p = if CMode == cp_mode ->
true;
CMode == ap_mode,
P_latest_author == MyName ->
true;
CMode == ap_mode,
not (I_am_in_P_latest_upi
orelse I_am_in_P_latest_repairing) ->
%% There is no sense for me to leave whatever
%% chain I'm in and go join some other chain
%% that doesn't include me at all in either
%% UPI or repairing. E.g., someone else
%% fell back to none proj ... that proj is
%% now P_latest and it's unanimous. But that
%% doesn't make it a good idea. ^_^
false;
CMode == ap_mode,
I_am_in_P_latest_repairing ->
%% If I'm already in the current UPI, and the
%% UPI is longer than 1 (i.e., more than just
%% me), then it makes no sense to leave the UPI
%% to go to someone else's suggestion of
%% repairing. If I'm the only member of
%% P_current UPI, then sure, then having me
%% join a repairing list is relevant.
not (lists:member(MyName, P_current_upi) andalso
length(P_current_upi) > 1);
CMode == ap_mode ->
true
end,
?REACT({b10,?LINE,[{newprop_epoch,P_newprop#projection_v1.epoch_number},
{is_relevant_to_me_p,IsRelevantToMe_p}]}),
if
LatestUnanimousP ->
LatestUnanimousP andalso IsRelevantToMe_p ->
?REACT({b10, ?LINE,
[{latest_unanimous_p, LatestUnanimousP},
{latest_epoch,P_latest#projection_v1.epoch_number},