- 24 Mar, 2022 1 commit
-
-
Ozan Tezcan authored
Delete private typedefs, use namespace raft_ for exported symbols
-
- 21 Mar, 2022 1 commit
-
-
Ozan Tezcan authored
-
- 13 Mar, 2022 3 commits
-
-
Ozan Tezcan authored
-
Ozan Tezcan authored
-
Ozan Tezcan authored
-
- 15 Nov, 2021 1 commit
-
-
Ozan Tezcan authored
Added snapshot RPC to support large state machines.
-
- 07 Oct, 2021 1 commit
-
-
Shaya Potter authored
this started off as a small tweak and grew a bit 1) new callback for transfer leader result, along with its own enum of states 2) change/remove raft_reset_transfer_leader() calls only call in places where there's a new leader or timeout (i.e. failed to transfer within period). so, we only reset in 3 places 1) recv_appendentries 2) raft_periodic (timeout) 3) raft_become_leader 2a) raft_become_leader also got refactored a little to only issue the normal cb.notify_state_event() callback after it has set its state to be leader (as before, it could fail after the callback was issued) 2b) in raft_periodic the raft_reset_transfer_leader() is pulled out the "if LEADER" block, as will lose leader when a vote is issued to it, we still want it to timeout if leadership isn't gained 3) raft_reset_transfer_leader() does the logic for determining success/failure now, but becaue timeout is its own result which can't be determined by just looking at leader/desired, add a new flag to it to note timeout state 4) leader stickiness in requestvote is only tested for prevote (as in a timeout now case, we want to drop the timeout now flag after prevotes are sent). The idea is that we will only get to actual election if prevote passes. 4) a bunch of new tests * fix issue with timeout flag to reset_transfer_leader also fix test to catch the original error * libraft/redisraft changes needed for e2e leader transfer * make leader stickiness only for prevote
-
- 23 Sep, 2021 1 commit
-
-
Shaya Potter authored
this is the small modifications needed for raftlib to support timeout now rpc 1) add a flag to requestvote type to tell other nodes its overriding normal chec 2) new send_timeoutnow callback to send a timeout now rpc at right time 3) call said callback is we've marked the node as timeout now and in raft_appendentries_response raft_get_current_idx(me_) == r->current_idx (i.e. response says the node's idx is up to date with leader) 4) add helper functions to set/get/reset timeout flag on node structs for targeted node. how it would be used by client 1) client of libraft will call raft_transfer_leader(raft_server_t* me_, raft_node_id_t node_id) to target the node they want to transfer to. 2) client of libraft will provide the send_timeoutnow() callback for the actual sending of the rpc 3) client of libraft will modify their existing notify_state_event() callback to observe the result of the timeout now operation. if it receives a RAFT_STATE_LEADERSHIP_TRANSFER_FAILED, then the transfer failed if it received a RAFT_STATE_FOLLOWER, then it inspects for the actual leader to see if its the expected one and can return that it was transferred to expected node or not if it received a RAFT_STATE_CANDIDATE, then the transfer also failed, as the targeted node sent a request vote which removed leadership, but wasn't able to win the election. With PreVote, this latter case should be very rare.
-
- 22 Sep, 2021 1 commit
-
-
Shaya Potter authored
* fix read queue test to be more accurate 1) each server's set of nodes, keeps the max msg_id its seen from that node when that node has been later 1a) because of this get_max_seen now operates on a server's nodes, not on the server itself b 2) virtraft encodes the leader id into the "arg" (with a user redefinable multiplier) it sends as part of the callback, so when we get the callback, we can know what leader its for and check its voters for correctness.
-
- 14 Sep, 2021 1 commit
-
-
Ozan Tezcan authored
* prevote implementation
-
- 12 Sep, 2021 1 commit
-
-
Shaya Potter authored
* add a read_queue test to virtraft every iteration we push a read_queue request and the handler and an we pass to it set a variable on calling. we can use this to make sure that the read_queue doesn't get too far from the iteration. i.e. we pass the leader's msg_id and can check to ensure that leader's msg_id doesn't get too far from the msg_id (variable) we see in read_queue test this is analog to the current log applying deadlock test. * implements msg_id checking in virtraft for verification of read_queue requests When we pop an entry off the read_queue with the can_read flag, we verify across all nodes that the majority of nodes have accepted from the leader a msg_id past what this read_queue entry needs. the problem with this is, that until now, msg_id was private to each server instance and has no relevance to the followre nodes except to include it back in response. we change that to have the followers store the max msg_id they've seen from their current leader using that, in the read_queue_handler we can verify that the leader's voting nodes have a quorum past the msg_id variable that the handler will return to ensure that this read_queue handler call is correct.
-
- 09 Sep, 2021 1 commit
-
-
Ozan Tezcan authored
Unknown node handling
-
- 18 Aug, 2021 1 commit
-
-
Ozan Tezcan authored
Implemented check-quorum
-
- 11 Aug, 2021 1 commit
-
-
Ozan Tezcan authored
-
- 04 Aug, 2021 1 commit
-
-
Shaya Potter authored
create a self documenting function name instead of throwing in a bunch of conditions
-
- 27 Jul, 2021 1 commit
-
-
Shaya Potter authored
raft_get_last_log_term() is used for filling in vote requests, except it didn't match 100% with the logic in should_grant_vote * update test to prove that change works as needed previous test tested when we don't snapshot everything, but code was broken when we did. modified test tested only when we snapshot everything, now we do both in sequence. * use raft_get_last_log_term in __should_grant_vote() also modify __should_grant_vote to take a raft_server_t instead of raft_server_privat_t so its not constantly casting it to void.
-
- 09 Dec, 2018 1 commit
-
-
Yossi Gottlieb authored
-
- 06 Dec, 2018 1 commit
-
-
Yossi Gottlieb authored
-
- 07 Aug, 2018 2 commits
-
-
Yossi Gottlieb authored
If specified when calling raft_begin_snapshot(), the library will not postpone applying entries during snapshots. This requires the FSM to provide full isolation between the snapshot and active state.
-
Yossi Gottlieb authored
If specified when calling raft_begin_snapshot(), the library will not postpone applying entries during snapshots. This requires the FSM to provide full isolation between the snapshot and active state.
-
- 30 Jul, 2018 2 commits
-
-
Yossi Gottlieb authored
This cancels the snapshot operation and reverts back to the state we were in before raft_begin_snapshot(). It is useful for cases where the snapshot operation fails. It is the caller's responsibility to make sure the FSM state remains intact of course.
-
Yossi Gottlieb authored
This cancels the snapshot operation and reverts back to the state we were in before raft_begin_snapshot(). It is useful for cases where the snapshot operation fails. It is the caller's responsibility to make sure the FSM state remains intact of course.
-
- 20 Jun, 2018 1 commit
-
-
Yossi Gottlieb authored
-
- 24 May, 2018 1 commit
-
-
Yossi Gottlieb authored
-
- 08 Jan, 2018 1 commit
-
-
Willem Thiart authored
-
- 21 Nov, 2017 3 commits
-
-
Li Wei authored
User storage callbacks may return negative errors smaller than RAFT_ERR_LAST. These will be returned all the way to the API methods, which report the errors back to users, so that appropriate handlings may be performed. Signed-off-by:
Li Wei <wei.g.li@intel.com>
-
Li Wei authored
If raft_become_candidate() assigns a negative value e (i.e., -election_timeout < e < 0) to timeout_elapsed, and if this replica successfully becomes the leader, then this leader won't send heartbeats for request_timeout - e milliseconds. This may be longer than election_timeout and cause an unnecessary leadership change. This patch zeroes timeout_elapsed in raft_become_leader(), randomizes election timeouts in [election_timeout, 2 * election_timeout), and fixes raft_recv_appendentries() to avoid zeroing timeout_elapsed if the AE request has an older term. Signed-off-by:
Li Wei <wei.g.li@intel.com>
-
Li Wei authored
Remind users' persist_term implementations to persist currentTerm and nil votedFor atomically. Signed-off-by:
Li Wei <wei.g.li@intel.com>
-
- 09 May, 2017 1 commit
-
-
Willem Thiart authored
Beforehand there were if statements to check if callbacks were provided by the user. This was only useful for making the test suites shorter. These if statements have been removed so that the core code is more concise.
-
- 11 Jun, 2016 1 commit
-
-
Willem Thiart authored
-
- 13 May, 2016 2 commits
-
-
Willem Thiart authored
-
Willem Thiart authored
This fix prevents deadlocks (ie. when we are trying to get votes from non-voting nodes that never vote).
-
- 16 Mar, 2016 1 commit
-
-
Willem Thiart authored
-
- 25 Jan, 2016 1 commit
-
-
Willem Thiart authored
-
- 20 Dec, 2015 1 commit
-
-
Willem Thiart authored
-
- 19 Dec, 2015 3 commits
-
-
Willem Thiart authored
-
Willem Thiart authored
-
Willem Thiart authored
-
- 18 Nov, 2015 2 commits
-
-
Willem Thiart authored
-
Willem Thiart authored
-