Re: [CEPH] Ceph multi nodes failed

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Den fre 24 nov. 2023 kl 08:53 skrev Nguyễn Hữu Khôi <nguyenhuukhoinw@xxxxxxxxx>:
>
> Hello.
> I have 10 nodes. My goal is to ensure that I won't lose data if 2 nodes
> fail.

Now you are mixing terms here.

There is a difference between "cluster stops" and "losing data".

If you have EC 8+2 and min_size 9, then when you stop two hosts, ceph
stops allowing writes exactly so that you do not lose data, making
sure the data is protected until you can get one or two hosts back up
again into the cluster. If you need to keep being able to write to the
cluster with two hosts down, you need EC to be X+3 with min_size =
X+1, this way it will still allow writes when two hosts are down.

-- 
May the most significant bit of your life be positive.
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