Compress makes a compressed writer from the given one.

NewOplog creates a new Oplog instance.

NodeSuits checks if node can perform backup.

Upload writes data to dst from given src and returns an amount of written bytes.

ErrCancelled means backup was canceled.

NopCloser wraps an io.Witer as io.WriteCloser with noop Close.

Oplog is used for reading the Mongodb oplog.