I am trying to understand Zookeeper using this book - Zookeeper By Flavio Junqueira, Benjamin Reed <http://shop.oreilly.com/product/0636920028901.do> , it is mentioned that we need to select a majority of servers for quorum as stated here:
"Say that we use four servers for an ensemble. A majority of servers is comprised of three servers. However, this system will only tolerate a single crash, because a double crash makes the system lose majority. Consequently, with four servers, we can only tolerate a single crash, but quorums now are larger, which implies that we need more acknowledgments for each request. The bottom line is that we should always shoot for an odd number of servers." Please help me in understanding this. How do we select the majority of servers for a given ensemble? Why does this statement say quorums now are larger and why do we need more acknowledgments for each request? -- View this message in context: http://zookeeper-user.578899.n2.nabble.com/What-should-be-the-majority-in-an-ensemble-for-Zookeeper-tp7579721.html Sent from the zookeeper-user mailing list archive at Nabble.com.
