Reweight all items within a subtree. For example, you might reweigh tall
OSDs within a rack to a new value.
Signed-off-by: Sage Weil <sage@inktank.com>
Prevent creation of buckets of type 0 ('osd', 'device', etc.), as they
will confusing the mapping algorithm.
Signed-off-by: Sage Weil <sage@inktank.com>
The adjust method returns a count of adjusted items.
Add a test.
Fixes: #6382
Backport: dumpling
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Dan Mick <dan.mick@inktank.com>
If we add an item that already exists in particular position, we should
update instead of inserting it; the CrushWrapper methods are not
idempotent.
Signed-off-by: Sage Weil <sage@inktank.com>
