What's new for release 3.6 #5538
Conversation
github-actions
bot
temporarily deployed
to
branch-gh-5537-whats-new-3.6
github-actions
bot
temporarily deployed
to
branch-gh-5537-whats-new-3.6
github-actions
bot
temporarily deployed
to
branch-gh-5537-whats-new-3.6
github-actions
bot
temporarily deployed
to
branch-gh-5537-whats-new-3.6
sergepetrenko
left a comment
sergepetrenko
left a comment
There was a problem hiding this comment.
Thanks for the clarifications in the 2DC synchro section!
Please find a couple more comments below.
doc/release/3.6.0.rst
Outdated
|
|
||
| However, there are some limitations. | ||
| An important thing is that while data storages can be located in just 2 DCs, | ||
| the configuration storage (based on etcd or Tarantool) must be located in yet another DC |
There was a problem hiding this comment.
I'm not sure I can parse this sentence correctly. Does it mean configuration storage has to be located in 3 datacenters or just in another DC, separate from the 2 used for storing data?
AFAIU, we should set up configuration storage in 3 DCs, the easiest way to do so is by using 2 existing "data" DCs + 1 extra "quorum" DC.
There was a problem hiding this comment.
Huh, I deduced this from Alex Klenov's feedback: "Чтобы всё устойчиво работало, нужно чтобы хранилище конфигурации располагалось на трёх площадках. То есть данные мы храним в двух ЦОДах. Но при этом у нас есть третяя площадка для принятия решений."
So, I've guessed it wrong that we need only 1 configuration storage here -- the one located in DC #3.
Re-iterated it with Alex. Indeed, we need 3 config storages. Thanks for spotting!
| to 1. The cluster keeps serving the clients. | ||
| b. DC #1 goes up and starts obtaining missed data from DC #2. The quorum size is still 1. | ||
| c. The data enrichment process for DC #1 is still in progress, but DC #2 goes down now. | ||
| In this case, the cluster becomes unavailable. |
There was a problem hiding this comment.
I'm not sure about case 1, let's ask @georgiy-belyanin for clarifications. Is this really what's going to happen?
No description provided.