Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Samuel, thanks a lot for the jira link. Another reason to upgrade to 2.1 :-) regards, Christian On Thu, Sep 10, 2015 at 1:28 PM, Samuel CARRIERE wrote: > Hi Christian, > The problem you mention (violation of constency) is a true one. If I have > understood

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Christian, The problem you mention (violation of constency) is a true one. If I have understood correctly, it is resolved in cassandra 2.1 (see CASSANDRA-2434). Regards, Samuel horschi a écrit sur 10/09/2015 12:41:41 : > De : horschi > A :

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Rob, regarding 1-3: Thank you for the step-by-step explanation :-) My mistake was to use join_ring=false during the inital start already. It now works for me as its supposed to. Nevertheless it does not what I want, as it does not take writes during the time of repair/rebuild: Running an 8

Re: Is it possible to bootstrap the 1st node of a new DC?

> > > I've learned from experience that the node immediately joins the cluster, >> and starts accepting reads (from other DCs) for the range it owns. > > > This seems to be the incorrect assumption at the heart of the confusion. > You "should" be able to prevent this behavior entirely via correct

Re: Is it possible to bootstrap the 1st node of a new DC?

On Wed, Sep 9, 2015 at 1:05 AM, Tom van den Berge wrote: > >> I've learned from experience that the node immediately joins the cluster, >>> and starts accepting reads (from other DCs) for the range it owns. >> >> >> This seems to be the incorrect assumption at the

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Tom, "The idea of join_ring=false is that other nodes are not aware of the new node, and therefore never send requests to it. The new node can then be repaired" Nicely explained, but I still see the issue that this node would not receive writes during that time. So after the repair the node

Re: Is it possible to bootstrap the 1st node of a new DC?

> > "one drawback: the node joins the cluster as soon as the bootstrapping > begins." > I am not sure I understand this correctly. It will get tokens, but not > load data if you combine it with autobootstrap=false. > Joining the cluster means that all other nodes become aware of the new node, and

Re: Is it possible to bootstrap the 1st node of a new DC?

> Running nodetool rebuild on a node that was started with join_ring=false >> does not work, unfortunately. The nodetool command returns immediately, >> after a message appears in the log that the streaming of data has started. >> After that, nothing happens. > > > Per driftx, the author of

Re: Is it possible to bootstrap the 1st node of a new DC?

On Tue, Sep 8, 2015 at 1:39 AM, horschi wrote: > "The idea of join_ring=false is that other nodes are not aware of the new > node, and therefore never send requests to it. The new node can then be > repaired" > Nicely explained, but I still see the issue that this node would

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Robert, I tried to set up a new node with join_ring=false once. In my test that node did not pick a token in the ring. I assume running repair or rebuild would not do anything in that case: No tokens = no data. But I must admit: I have not tried running rebuild. Is a new node with

Re: Is it possible to bootstrap the 1st node of a new DC?

On Tue, Sep 8, 2015 at 2:39 PM, horschi wrote: > I tried to set up a new node with join_ring=false once. In my test that > node did not pick a token in the ring. I assume running repair or rebuild > would not do anything in that case: No tokens = no data. But I must admit: > I

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Christian, No, I never tried survey mode. I didn't know it until now, but form the info I was able to find it looks like it is meant for a different purpose. Maybe it can be used to bootstrap a new DC, though. On the other hand, the auto_bootstrap=false + rebuild scenario seems to be designed

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Tom, "one drawback: the node joins the cluster as soon as the bootstrapping begins." I am not sure I understand this correctly. It will get tokens, but not load data if you combine it with autobootstrap=false. How I see it: You should be able to start all the new nodes in the new DC with

Re: Is it possible to bootstrap the 1st node of a new DC?

Running nodetool rebuild on a node that was started with join_ring=false does not work, unfortunately. The nodetool command returns immediately, after a message appears in the log that the streaming of data has started. After that, nothing happens. Tom On Fri, Sep 12, 2014 at 5:47 PM, Robert

Re: Is it possible to bootstrap the 1st node of a new DC?

Hi Tom, this sounds very much like my thread: "auto_bootstrap=false broken?" Did you try booting the new node with survey-mode? I wanted to try this, but I am waiting for 2.0.17 to come out (survey mode is broken in earlier versions). Imho survey mode is what you (and me too) want: start a node,

Re: Is it possible to bootstrap the 1st node of a new DC?

Giving this some more thought, I think it's fair to say that using LOCAL_ONE and LOCAL_QUORUM instead of ONE and QUORUM in this situation is a actually workaround rather than a solution for this problem. LOCAL_ONE and LOCAL_QUORUM are introduced to ensure that only the local DC is used, which can

Re: Is it possible to bootstrap the 1st node of a new DC?

On Fri, Sep 12, 2014 at 6:57 AM, Tom van den Berge t...@drillster.com wrote: Wouldn't it be far more efficient if a node that is rebuilding itself is responsible for not accepting reads until the rebuild is complete? E.g. by marking it as Joining, similar to a node that is being bootstrapped?

Is it possible to bootstrap the 1st node of a new DC?

When setting up a new (additional) data center, the documentation tells us to use nodetool rebuild -- old dc to fill up the node(s) in the new dc, and to disable auto_bootstrap. I'm wondering if it is possible to fill the node with auto_bootstrap=true instead of a nodetool rebuild command. If so,

Re: Is it possible to bootstrap the 1st node of a new DC?

Thanks, Rob. I actually tried using LOCAL_ONE instead of ONE, but I still saw this problem. Maybe I missed some queries when updating to LOCAL_ONE. Anyway, it's good to know that this is supposed to work. Tom On Thu, Sep 11, 2014 at 10:28 PM, Robert Coli rc...@eventbrite.com wrote: On Thu, Sep