Comments (1)
Hi,
when you download and decompile your crush map you get a text file containing a list of entities (buckets) that are identified by a unique id. Typically the id is a negative integer. When you want to modify the crush map adding a new bucket you have to add a section with the following syntax:
[bucket-type] [bucket-name] { id [a unique negative numeric ID] weight [the relative capacity/capability of the item(s)] alg [the bucket type: uniform | list | tree | straw ] hash [the hash type: 0 by default] item [item-name] weight [weight] }
where id
must be a negative integer different from all the others already present in the crush map you are modifying.
Hope this is clear. For futher information you can look at the ceph documentation about the crush map: http://docs.ceph.com/docs/jewel/rados/operations/crush-map/
from ceph-tutorial.
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from ceph-tutorial.