Kenneth, if you want to take the JIRA, feel free to self-assign it to yourself and put up a pull request or patch, and I'll review. I'd be very happy to get more people involved in the docs.
On Thu, Feb 22, 2018 at 12:56 PM Kenneth Brotman <kenbrot...@yahoo.com.invalid> wrote: > That information would have saved me time too. Thanks for making a JIRA > for it Jon. Perhaps this is a good JIRA for me to begin with. > > > > Kenneth Brotman > > > > *From:* Jon Haddad [mailto:jonathan.had...@gmail.com] *On Behalf Of *Jon > Haddad > *Sent:* Thursday, February 22, 2018 11:11 AM > *To:* user > *Subject:* Re: Initializing a multiple node cluster (multiple datacenters) > > > > Great question. Unfortunately, our OSS docs lack a step by step process > on how to add a DC, I’ve created a JIRA to do that: > https://issues.apache.org/jira/browse/CASSANDRA-14254 > > > > The datastax docs are pretty good for this though: > https://docs.datastax.com/en/cassandra/latest/cassandra/operations/opsAddDCToCluster.html > > > > Regarding token allocation, it was random prior to 3.0. In 3.0 and up, it > is calculated a little more intelligently. in 3.11.2, which was just > released, CASSANDRA-13080 was backported which will help out when you add > your second DC. If you go this route, you can drop your token count down > to 16 and get all the benefits with no drawbacks. > > > > At this point I would go straight to 3.11.2 and skip 3.0 as there were > quite a few improvements that make it worthwhile along the way, in my > opinion. We work with several customers that are running 3.11 and are > pretty happy with it. > > > > Yes, if there’s no data, you can initialize the cluster with > auto_boostrap: true. Be sure to change any key spaces using simple > strategy to NTS first, and replica them to the new DC as well. > > > > Jon > > > > > > On Feb 22, 2018, at 10:53 AM, Jean Carlo <jean.jeancar...@gmail.com> > wrote: > > > > Hi jonathan > > > > Thank you for the answer. Do you know where to look to understand why this > works. As i understood all the node then will chose ramdoms tokens. How can > i assure the correctness of the ring? > > > > So as you said. Under the condition that there.is no data in the cluster. > I can initialize a cluster multi dc without disable auto bootstrap.? > > > > On Feb 22, 2018 5:43 PM, "Jonathan Haddad" <j...@jonhaddad.com> wrote: > > If it's a new cluster, there's no need to disable auto_bootstrap. That > setting prevents the first node in the second DC from being a replica for > all the data in the first DC. If there's no data in the first DC, you can > skip a couple steps and just leave it on. > > > > Leave it on, and enjoy your afternoon. > > > > Seeds don't bootstrap by the way, changing the setting on those nodes > doesn't do anything. > > > > On Thu, Feb 22, 2018 at 8:36 AM Jean Carlo <jean.jeancar...@gmail.com> > wrote: > > Hello > > I would like to clarify this, > > > > In order to initialize a cassandra multi dc cluster, without data. If I > follow the documentation datastax > > > > https://docs.datastax.com/en/cassandra/2.1/cassandra/initialize/initializeMultipleDS.html > > It says > > - auto_bootstrap: false (Add this setting *only* when initializing a > clean node with no data.) > > But I dont understand the way this works regarding to the auto_bootstraps. > > If all the machines make their own tokens in a ramdon way using > murmur3partitioner and vnodes , it isn't probable that two nodes will have > the tokens in common ? > > It is not better to bootstrap first the seeds with auto_bootstrap: false > and then the rest of the nodes with auto_bootstrap: true ? > > > > Thank you for the help > > > > Jean Carlo > > > "The best way to predict the future is to invent it" Alan Kay > > > > >
