Shulou(Shulou.com)05/31 Report--

In this issue, the editor will bring you about how to configure the ceph crush strategy. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

0. problem

A colleague built a cluster of two hosts. After ceph-s, the cluster will always appear.

Recovery 32402 objects degraded objects degraded 195672 warning.

The reason is that there are 3 copies by default. The crush select policy is to select 3 replicas from host. So we need to modify crush rules.

1. Get the crushmap binary file # ceph osd getcrushmap-o a.map2. Convert the binary file to a text file # crushtool-d a.map-o b3. Modify rules# vi brule replicated_ruleset {ruleset 0 type replicated min_size 1 max_size 10 step take default step chooseleaf firstn 0 type osd # step emit} 4. Convert a text file to a binary file

# crushtool-c b-o b.map5. Set up crushmap# ceph osd setcrushmap-I b.map above is how to configure the ceph crush strategy shared by the editor. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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