Thanks, got it! best, Yuheng
On Mon, Mar 9, 2015 at 11:52 AM, Harsha <ka...@harsha.io> wrote: > In general users are expected to run zookeeper cluster of 3 or 5 nodes. > Zookeeper requires quorum of servers running which means at least ceil(n/2) > servers need to be up. For 3 zookeeper nodes there needs to be atleast 2 zk > nodes up at any time , i.e your cluster can function fine incase of 1 > machine failure and incase of 5 there should be at least 3 nodes to be up > and running. For more info on zookeeper you can look under here > http://zookeeper.apache.org/doc/r3.4.6/ > http://zookeeper.apache.org/doc/r3.4.6/zookeeperAdmin.html > > > -- > Harsha > > On March 9, 2015 at 8:39:00 AM, Yuheng Du (yuheng.du.h...@gmail.com) > wrote: > > Harsha, > > Thanks for reply. So what if the zookeeper cluster fails? Will the topics > information be lost? What fault-tolerant mechanism does zookeeper offer? > > best, > > On Mon, Mar 9, 2015 at 11:36 AM, Harsha <ka...@harsha.io> wrote: > >> Yuheng, >> kafka keeps cluster metadata in zookeeper along with topic >> metadata as well. You can use zookeeper-shell.sh or zkCli.sh to check zk >> nodes, /brokers/topics will give you the list of topics . >> >> -- >> Harsha >> >> >> On March 9, 2015 at 8:20:59 AM, Yuheng Du (yuheng.du.h...@gmail.com) >> wrote: >> >> I am wondering where does kafka cluster keep the topic metadata (name, >> partition, replication, etc)? How does a server recover the topic's >> metadata and messages after restart and what data will be lost? >> >> Thanks for anyone to answer my questions. >> >> best, >> Yuheng >> >> >
