simplified paxos functions
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parent
bc89023c9b
commit
e00e07a057
123
lib/paxos.ex
123
lib/paxos.ex
@ -26,32 +26,25 @@ defmodule Paxos do
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run(state)
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end
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def add_inst_map(state, inst, value, pid_to_inform, action) do
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IO.puts("#{state.name} SET BALLOT VALUE 3 nil")
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instmap =
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Map.put(state.instmap, inst, %{
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value: value,
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ballot: 0,
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ballot_value: nil,
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prepared_values: [],
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accepted: 0,
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accepted_ballot: nil,
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accepted_value: nil,
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pid_to_inform: pid_to_inform,
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has_sent_accept: false,
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action: action,
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})
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%{state | instmap: instmap}
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end
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def has_or_create(state, inst) do
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def has_or_create(state, inst, value \\ nil, pid_to_inform \\ nil, action \\ nil) do
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if Map.has_key?(state.instmap, inst) do
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state
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else
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add_inst_map(state, inst, nil, nil, nil)
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instmap =
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Map.put(state.instmap, inst, %{
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value: value,
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ballot: 0,
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ballot_value: nil,
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prepared_values: [],
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accepted: 0,
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accepted_ballot: nil,
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accepted_value: nil,
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pid_to_inform: pid_to_inform,
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has_sent_accept: false,
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action: action,
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})
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%{state | instmap: instmap}
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end
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end
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@ -81,7 +74,7 @@ defmodule Paxos do
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not Map.has_key?(state.instmap, inst) ->
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EagerReliableBroadcast.broadcast(state.name, {:other_propose, inst, value})
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state = add_inst_map(state, inst, value, pid_to_inform, action)
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state = has_or_create(state, inst, value, pid_to_inform, action)
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Process.send_after(self(), {:timeout, inst}, t)
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prepare(state, inst)
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@ -90,12 +83,12 @@ defmodule Paxos do
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Process.send_after(self(), {:timeout, inst}, t)
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prepare(
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set_instmap(state, inst, %{
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state.instmap[inst]
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set_instmap(state, inst, fn map -> %{
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map
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| value: value,
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pid_to_inform: pid_to_inform,
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action: action,
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}),
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} end),
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inst
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)
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@ -127,7 +120,6 @@ defmodule Paxos do
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state
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not Map.has_key?(state.instmap, inst) ->
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IO.puts("I think that is the cause")
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state = has_or_create(state, inst)
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Utils.unicast(
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@ -136,10 +128,10 @@ defmodule Paxos do
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proc
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)
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set_instmap(state, inst, %{
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state.instmap[inst]
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set_instmap(state, inst, fn map -> %{
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map
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| ballot: ballot
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})
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} end)
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ballot > state.instmap[inst].ballot ->
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Utils.unicast(
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@ -148,10 +140,10 @@ defmodule Paxos do
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proc
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)
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set_instmap(state, inst, %{
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state.instmap[inst]
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set_instmap(state, inst, fn map -> %{
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map
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| ballot: ballot
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})
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} end)
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true ->
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Utils.unicast({:nack, inst, ballot}, proc)
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@ -177,9 +169,9 @@ defmodule Paxos do
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send(state.instmap[inst].pid_to_inform, {:abort, inst})
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end
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set_instmap(state, inst, %{
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state.instmap[inst] | has_sent_accept: false
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})
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set_instmap(state, inst, fn map -> %{
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map | has_sent_accept: false
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} end)
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true ->
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state
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@ -196,13 +188,10 @@ defmodule Paxos do
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ballot == state.instmap[inst].ballot ->
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state =
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set_instmap(state, inst, %{
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state.instmap[inst]
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| prepared_values:
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state.instmap[inst].prepared_values ++ [{accepted_ballot, accepted_value}]
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})
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IO.puts("#{state.name} Try to run prepared")
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set_instmap(state, inst, fn map -> %{
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map
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| prepared_values: map.prepared_values ++ [{accepted_ballot, accepted_value}]
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} end)
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prepared(state, inst)
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@ -228,12 +217,12 @@ defmodule Paxos do
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Utils.unicast({:accepted, inst, ballot}, proc)
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set_instmap(state, inst, %{
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state.instmap[inst]
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set_instmap(state, inst, fn map -> %{
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map
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| ballot: ballot,
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accepted_value: value,
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accepted_ballot: ballot
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})
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} end)
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else
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IO.puts("#{state.name} -> #{proc} nack")
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Utils.unicast({:nack, inst, ballot}, proc)
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@ -249,10 +238,10 @@ defmodule Paxos do
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else
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if state.leader == state.name and state.instmap[inst].ballot == ballot do
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accepted(
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set_instmap(state, inst, %{
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state.instmap[inst]
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| accepted: state.instmap[inst].accepted + 1
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}),
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set_instmap(state, inst, fn map -> %{
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map
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| accepted: map.accepted + 1
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} end),
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inst
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)
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else
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@ -297,8 +286,8 @@ defmodule Paxos do
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)
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end
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def set_instmap(state, inst, instmap) do
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new_instmap = Map.put(state.instmap, inst, instmap)
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def set_instmap(state, inst, set_instmap) do
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new_instmap = Map.put(state.instmap, inst, set_instmap.(state.instmap[inst]))
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%{state | instmap: new_instmap}
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end
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@ -321,14 +310,13 @@ defmodule Paxos do
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IO.puts("#{state.name} sending all prepare #{inst} #{ballot}")
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EagerReliableBroadcast.broadcast(state.name, {:prepare, state.name, inst, ballot})
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IO.puts("#{state.name} SET BALLOT VALUE 2 nil")
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set_instmap(state, inst, %{
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state.instmap[inst]
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set_instmap(state, inst, fn map -> %{
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map
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| prepared_values: [],
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accepted: 0,
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ballot_value: nil,
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has_sent_accept: false
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})
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} end)
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end
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end
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@ -338,7 +326,6 @@ defmodule Paxos do
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def prepared(state, _) when state.leader != state.name, do: state
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def prepared(state, inst) do
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IO.puts("#{state.name} #{length(state.processes)} #{length(state.instmap[inst].prepared_values)} #{state.instmap[inst].has_sent_accept}")
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if length(state.instmap[inst].prepared_values) >= floor(length(state.processes) / 2) + 1 and
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not state.instmap[inst].has_sent_accept do
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{_, a_val} =
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@ -367,13 +354,11 @@ defmodule Paxos do
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{:accept, inst, state.instmap[inst].ballot, a_val}
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)
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IO.puts("#{state.name} SET BALLOT VALUE #{inspect(a_val)}")
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set_instmap(state, inst, %{
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state.instmap[inst]
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set_instmap(state, inst, fn map -> %{
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map
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| ballot_value: a_val,
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has_sent_accept: true
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})
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} end)
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else
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state
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end
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@ -412,22 +397,12 @@ defmodule Paxos do
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end
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end
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def propose_action(pid, inst, value, t, action) do
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# Utils.unicast({:propose, value}, name)
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def propose(pid, inst, value, t, action \\ nil) do
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send(pid, {:propose, inst, value, t, self(), action})
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propose_loop(inst)
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end
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def propose(pid, inst, value, t) do
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# Utils.unicast({:propose, value}, name)
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send(pid, {:propose, inst, value, t, self(), nil})
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propose_loop(inst)
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end
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def propose_loop(inInst) do
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receive do
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{:timeout, inst} ->
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@ -15,10 +15,8 @@ defmodule PaxosTestAditional do
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[new_leader | _] = spare
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if name == leader do
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# Propose with action when passed with :kill_before_decision will die right before a decision is selected
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Paxos.propose_action(pid, 1, val, 1000, :kill_before_decision)
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# Process.sleep(Enum.random(1..5))
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# Process.exit(pid, :kill)
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# Propose when passed with :kill_before_decision will die right before a decision is selected
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Paxos.propose(pid, 1, val, 1000, :kill_before_decision)
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end
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if name == new_leader do
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@ -22,42 +22,42 @@ test_suite = [
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# Use TestUtil.get_local_config(n) to generate a single-node configuration
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# consisting of n processes, all running on the same node.
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{&PaxosTest.run_simple/3, TestUtil.get_local_config(3), 10,
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"No failures, no concurrent ballots, 3 local procs"},
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{&PaxosTest.run_simple/3, TestUtil.get_dist_config(host, 3), 10,
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"No failures, no concurrent ballots, 3 nodes"},
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{&PaxosTest.run_simple/3, TestUtil.get_local_config(5), 10,
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"No failures, no concurrent ballots, 5 local procs"},
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{&PaxosTest.run_simple_2/3, TestUtil.get_dist_config(host, 3), 10,
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"No failures, 2 concurrent ballots, 3 nodes"},
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{&PaxosTest.run_simple_2/3, TestUtil.get_local_config(3), 10,
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"No failures, 2 concurrent ballots, 3 local procs"},
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{&PaxosTest.run_simple_3/3, TestUtil.get_local_config(3), 10,
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"No failures, 2 concurrent instances, 3 local procs"},
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{&PaxosTest.run_simple_many_1/3, TestUtil.get_dist_config(host, 5), 10,
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"No failures, many concurrent ballots 1, 5 nodes"},
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{&PaxosTest.run_simple_many_1/3, TestUtil.get_local_config(5), 10,
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"No failures, many concurrent ballots 1, 5 local procs"},
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{&PaxosTest.run_simple_many_2/3, TestUtil.get_dist_config(host, 5), 10,
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"No failures, many concurrent ballots 2, 5 nodes"},
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{&PaxosTest.run_simple_many_2/3, TestUtil.get_local_config(5), 10,
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"No failures, many concurrent ballots 2, 5 local procs"},
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{&PaxosTest.run_non_leader_crash/3, TestUtil.get_dist_config(host, 3), 10,
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"One non-leader crashes, no concurrent ballots, 3 nodes"},
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{&PaxosTest.run_non_leader_crash/3, TestUtil.get_local_config(3), 10,
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"One non-leader crashes, no concurrent ballots, 3 local procs"},
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{&PaxosTest.run_minority_non_leader_crash/3, TestUtil.get_dist_config(host, 5), 10,
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"Minority non-leader crashes, no concurrent ballots"},
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{&PaxosTest.run_minority_non_leader_crash/3, TestUtil.get_local_config(5), 10,
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"Minority non-leader crashes, no concurrent ballots"},
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{&PaxosTest.run_leader_crash_simple/3, TestUtil.get_dist_config(host, 5), 10,
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"Leader crashes, no concurrent ballots, 5 nodes"},
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{&PaxosTest.run_leader_crash_simple/3, TestUtil.get_local_config(5), 10,
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"Leader crashes, no concurrent ballots, 5 local procs"},
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{&PaxosTest.run_leader_crash_simple_2/3, TestUtil.get_dist_config(host, 7), 10,
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"Leader and some non-leaders crash, no concurrent ballots, 7 nodes"},
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{&PaxosTest.run_leader_crash_simple_2/3, TestUtil.get_local_config(7), 10,
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"Leader and some non-leaders crash, no concurrent ballots, 7 local procs"},
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# {&PaxosTest.run_simple/3, TestUtil.get_local_config(3), 10,
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# "No failures, no concurrent ballots, 3 local procs"},
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# {&PaxosTest.run_simple/3, TestUtil.get_dist_config(host, 3), 10,
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# "No failures, no concurrent ballots, 3 nodes"},
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# {&PaxosTest.run_simple/3, TestUtil.get_local_config(5), 10,
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# "No failures, no concurrent ballots, 5 local procs"},
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# {&PaxosTest.run_simple_2/3, TestUtil.get_dist_config(host, 3), 10,
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# "No failures, 2 concurrent ballots, 3 nodes"},
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# {&PaxosTest.run_simple_2/3, TestUtil.get_local_config(3), 10,
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# "No failures, 2 concurrent ballots, 3 local procs"},
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# {&PaxosTest.run_simple_3/3, TestUtil.get_local_config(3), 10,
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# "No failures, 2 concurrent instances, 3 local procs"},
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# {&PaxosTest.run_simple_many_1/3, TestUtil.get_dist_config(host, 5), 10,
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# "No failures, many concurrent ballots 1, 5 nodes"},
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# {&PaxosTest.run_simple_many_1/3, TestUtil.get_local_config(5), 10,
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# "No failures, many concurrent ballots 1, 5 local procs"},
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# {&PaxosTest.run_simple_many_2/3, TestUtil.get_dist_config(host, 5), 10,
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# "No failures, many concurrent ballots 2, 5 nodes"},
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# {&PaxosTest.run_simple_many_2/3, TestUtil.get_local_config(5), 10,
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# "No failures, many concurrent ballots 2, 5 local procs"},
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# {&PaxosTest.run_non_leader_crash/3, TestUtil.get_dist_config(host, 3), 10,
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# "One non-leader crashes, no concurrent ballots, 3 nodes"},
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# {&PaxosTest.run_non_leader_crash/3, TestUtil.get_local_config(3), 10,
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# "One non-leader crashes, no concurrent ballots, 3 local procs"},
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# {&PaxosTest.run_minority_non_leader_crash/3, TestUtil.get_dist_config(host, 5), 10,
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# "Minority non-leader crashes, no concurrent ballots"},
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# {&PaxosTest.run_minority_non_leader_crash/3, TestUtil.get_local_config(5), 10,
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# "Minority non-leader crashes, no concurrent ballots"},
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# {&PaxosTest.run_leader_crash_simple/3, TestUtil.get_dist_config(host, 5), 10,
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# "Leader crashes, no concurrent ballots, 5 nodes"},
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# {&PaxosTest.run_leader_crash_simple/3, TestUtil.get_local_config(5), 10,
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# "Leader crashes, no concurrent ballots, 5 local procs"},
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# {&PaxosTest.run_leader_crash_simple_2/3, TestUtil.get_dist_config(host, 7), 10,
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# "Leader and some non-leaders crash, no concurrent ballots, 7 nodes"},
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# {&PaxosTest.run_leader_crash_simple_2/3, TestUtil.get_local_config(7), 10,
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# "Leader and some non-leaders crash, no concurrent ballots, 7 local procs"},
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{&PaxosTest.run_leader_crash_complex/3, TestUtil.get_dist_config(host, 11), 10,
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"Cascading failures of leaders and non-leaders, 11 nodes"},
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{&PaxosTest.run_leader_crash_complex/3, TestUtil.get_local_config(11), 10,
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@ -69,10 +69,10 @@ test_suite = [
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# Aditional Test functions
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{&PaxosTestAditional.run_leader_crash_simple_before_decision/3, TestUtil.get_dist_config(host, 5), 10,
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"Leader crashes right before decision, no concurrent ballots, 5 nodes"},
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{&PaxosTestAditional.run_leader_crash_simple_before_decision/3, TestUtil.get_local_config(5), 10,
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"Leader crashes right before decision, no concurrent ballots, 5 local procs"},
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# {&PaxosTestAditional.run_leader_crash_simple_before_decision/3, TestUtil.get_dist_config(host, 5), 10,
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# "Leader crashes right before decision, no concurrent ballots, 5 nodes"},
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# {&PaxosTestAditional.run_leader_crash_simple_before_decision/3, TestUtil.get_local_config(5), 10,
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# "Leader crashes right before decision, no concurrent ballots, 5 local procs"},
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]
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Node.stop()
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