Hi Han,
How / when do the existing nodes update their Token Ring state?
The new joining node sets its tokens and populates to the cluster via
gossip after completing data streaming.
is that different between the seed node and non-seed node?
Data streaming step is skipped if a node is seed.
Checkout `StorageService#joinTokenRing()` for the details.
I'm particularly trying to understand the fault-tolerant part of updating
> Token Ring state on every node
The new node only joins the ring (updates the rings state) when the data
streaming (bootstrapping) is successful. Otherwise, the existing ring
remains as is, the joining node remains in JOINING state, and it won't get
any client traffic. If I understand the question correctly.
Hopefully, the answers help.
- Yifan
On Sun, Jan 24, 2021 at 1:00 PM Han wrote:
> Hi,
>
> I wanted to understand how the bootstrapping (add a new node) works. My
> understanding is that the first step is Token Allocation and the new node
> will get a number of tokens.
>
> My question is:
>
> How / when do the existing nodes update their Token Ring state? and is
> that different between the seed node and non-seed node?
>
> I'm particularly trying to understand the fault-tolerant part of updating
> Token Ring state on every node, but couldn't find relevant info by
> searching.
>
> Any info or pointers are appreciated.
>
> Thanks!
> Han
>
>
