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8 Commits

Author SHA1 Message Date
Marin Tomic
9e42ebbb67 Implement simple log file storage for raft 
Summary:
Added wrappers for some Unix system calls in utils/filesystem.hpp and implemented
a simple log storage interface for Raft. It is not very efficient, we will need
something more sophisticated later, but this is good enough for testing.

Reviewers: mferencevic, mislav.bradac, buda, mculinovic

Reviewed By: mferencevic

Subscribers: teon.banek, dgleich, pullbot

Differential Revision: https://phabricator.memgraph.io/D1091
 2018-01-15 18:07:45 +01:00
Dominik Gleich
007a7f1a6d Change network design from Start/Shutdown to constructor/destructor 
Summary:
Make ServerT start on constructor

Remove shutdown from MasterCoordinator

Distributed system remove Shutdown

Rcp server start and shutdown removed

Reviewers: florijan, mferencevic

Reviewed By: mferencevic

Subscribers: mferencevic, pullbot

Differential Revision: https://phabricator.memgraph.io/D1097
 2018-01-10 14:58:57 +01:00
Marin Tomic
20aa8d563a Implement RaftNetworkInterface via RPC 
Summary:
Add missing fields in RequestVote RPC

Unnest Raft RPC requests and responses

Make RPC request and reply serializable

Refactor Raft network interface

Implement RPC retrying with backoff period

Add cerealization functions for optional

Add RPC network interface for raft

Add some comments and documentation

Add manual test for RPC network interface

Remove raft reactor experiments

Reviewers: mislav.bradac, buda

Reviewed By: mislav.bradac

Subscribers: pullbot, mculinovic

Differential Revision: https://phabricator.memgraph.io/D1066
 2017-12-20 16:48:46 +01:00
Marin Tomic
5b7cb4602c Add simple client facing API for RaftMember 
Summary:
Implement AddComand method on RaftMember

Move RPCType out of rpc request and reply

Add unit test for AddCommand

Reviewers: mislav.bradac, buda

Reviewed By: mislav.bradac

Subscribers: pullbot, mculinovic

Differential Revision: https://phabricator.memgraph.io/D1042
 2017-12-18 07:32:39 +01:00
Marin Tomic
6b4a2cafc5 Fix OnRequestVote RPC callback 
Summary: RPC recipient should update its term even if it is rejecting the request.

Reviewers: mislav.bradac, buda

Reviewed By: mislav.bradac

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D1039
 2017-12-11 12:53:17 +01:00
Marin Tomic
0bf692f8ec Refactor Raft leader election to use multiple threads 
Summary:
Implement log replication

Rebase and fix src/CMakeLists.txt

Some style fixes

Changed shared_ptr to unique_ptr for RaftPeerState

Change Id and Leader to const

Move implementation to separate class

Fix raft_experiments.cpp

Reviewers: mislav.bradac

Reviewed By: mislav.bradac

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D1033
 2017-12-08 16:30:57 +01:00
Mislav Bradac
2d6675df63 Fix FindChannel implementation 
Summary:
Change queue implementation in distributed reactor

Fix FindChannel implementations

Reviewers: mtomic, buda, dgleich

Reviewed By: buda

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D986
 2017-11-15 17:55:33 +01:00
Marin Tomic
41f868319d Raft election 
Summary: Implemented leader election part of raft protocol

Reviewers: mislav.bradac, buda, teon.banek, dgleich

Reviewed By: mislav.bradac

Subscribers: dgleich, pullbot

Differential Revision: https://phabricator.memgraph.io/D966
 2017-11-13 12:47:12 +01:00