I have two questions regarding the kafka broker setup.

1. Assuming i have a 4-broker and 2-zookeeper (running in quorum mode)
setup, if topicA-partition0 has the leader set to broker4, can I change the
leader to other broker without killing the current leader?

2. What is the latency of switching to a different leader when the current
leader is down? Do we configure it using the consumer property -

3. What is the best practice of dynamically adding a new node to a kafka
cluster? Should i bring up the node, and then increase the replication
factor for the existing topic(s)?
thanks in advance,

NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB