On Thu, Oct 1, 2009 at 11:26 AM, Igor Katkov <[email protected]> wrote:
> Hi,
>
> Question#1:
> How to manually select tokens to force equal spacing of tokens around the
> hash space?
(Answered by Jun.)
> Question#2:
> Let's assume that #1 was resolved somehow and key distribution is more or
> less even.
> A new node "C" joins the cluster. It's token falls somewhere between two
> other tokens on the ring (from nodes "A" and "B" clockwise-ordered). From
> now on "C" is responsible for a portion of data that used to exclusively
> belong to "B".
> a. Cassandra v.0.4 will not automatically transfer this data to "C" will it?
It will, if you start C with the -b ("bootstrap") flag.
> b. Do all reads to these keys fail?
No.
> c. What happens with the data reference by these keys on "B"? It will never
> be accessed there, therefor it becomes garbage. Since there are to GC will
> it stick forever?
nodeprobe cleanup after the bootstrap completes will instruct B to
throw out data that has been copied to C.
> d. What happens to replicas of these keys?
These are also handled by -b.
-Jonathan
