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Consensus with network clock (#71)

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This commit is contained in:
Asanka Indrajith
2019-12-19 01:29:46 -05:00
committed by GitHub
parent d6751c3e52
commit 23a3fa9b39
6 changed files with 74 additions and 21 deletions
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11
src/cons/state_handler.cpp
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@@ -12,11 +12,9 @@ namespace cons
{
// Max number of requests that can be awaiting response at any given time.
constexpr uint16_t MAX_AWAITING_REQUESTS = 4;
constexpr uint16_t MAX_AWAITING_REQUESTS = 1;
// Syncing loop sleep delay.
constexpr uint16_t SYNC_LOOP_WAIT = 50;
// No of loop cycles to wait for a response before resubmitting request.
constexpr uint16_t MAX_AWAITING_CYCLES = 1000 / SYNC_LOOP_WAIT;
constexpr uint16_t SYNC_LOOP_WAIT = 100;
// List of state responses flatbuffer messages to be processed.
std::list<std::string> candidate_state_responses;
@@ -37,7 +35,7 @@ void request_state_from_peer(const std::string &path, const bool is_file, const
p2p::peer_outbound_message msg(std::make_unique<flatbuffers::FlatBufferBuilder>(1024));
fbschema::p2pmsg::create_msg_from_state_request(msg.builder(), sr, lcl);
p2p::send_message_to_random_peer(msg);
p2p::send_message_to_random_peer(msg); //todo: send to a node that hold the majority state to improve reliability of retrieving state.
}
int create_state_response(p2p::peer_outbound_message &msg, const p2p::state_request &sr)
@@ -159,7 +157,8 @@ int run_state_sync_iterator()
// Check for long-awaited responses and re-request them.
for (auto &[hash, request] : submitted_requests)
{
if (request.waiting_cycles < MAX_AWAITING_CYCLES)
// We wait for half of round time before each request is resubmitted.
if (request.waiting_cycles < (conf::cfg.roundtime / (SYNC_LOOP_WAIT * 2)))
{
// Increment counter.
request.waiting_cycles++;