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doc/rados: Add explanation of straw2 #19247

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merged 1 commit into from Nov 30, 2017

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Signed-off-by: Shinobu Kinjo shinobu@redhat.com

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@liewegas Can you add more good explanation, when you get a chance?

@@ -313,6 +313,13 @@ and one rack bucket. The OSDs are declared as items within the host buckets::
fairly “compete” against each other for replica placement through a
process analogous to a draw of straws.

#. **Straw2**: List and Tree buckets improves Straw that correctly
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Straw2 buckets improve Straw to correctly avoid any data movement between items when neighbor weights change.

Signed-off-by: Shinobu Kinjo <shinobu@redhat.com>
@liewegas liewegas merged commit ffc2490 into ceph:master Nov 30, 2017
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thanks!

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