Skip to content

Choose sync peer other than leader when possible #2041

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
cead22 merged 3 commits into from
Dec 31, 2024
Merged

Choose sync peer other than leader when possible #2041

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
5ba847e
adding logic to skip leader
danieldoglas Dec 24, 2024
a16718b
Merge branch 'dsilva_blockingCommandPortWhenNotCaughtUp' into dsilva_…
danieldoglas Dec 24, 2024
a92f259
addressing comments
danieldoglas Dec 31, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 12 additions & 0 deletions sqlitecluster/SQLiteNode.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2212,6 +2212,12 @@ void SQLiteNode::_updateSyncPeer()
continue;
}

// We want to sync, if possible, from a peer that is not the leader. So at this point, skip choosing it
// as the newSyncPeer.
if (peer == _leadPeer) {
continue;
}

// Any peer that makes it to here is a usable peer, so it's by default better than nothing.
if (!newSyncPeer) {
newSyncPeer = peer;
Expand All @@ -2234,6 +2240,12 @@ void SQLiteNode::_updateSyncPeer()
}
}

// If we reached this point, it means that there are no other available peers to sync from, but leader
// was a valid choice. In this case, let's use it as the newSyncPeer.
if (!newSyncPeer && _leadPeer) {
newSyncPeer = _leadPeer;
}

// Log that we've changed peers.
if (_syncPeer != newSyncPeer) {
string from, to;
Expand Down