[Bugs] [Bug 1366494] Rebalance is not considering the brick sizes while fixing the layout

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1366494

Nithya Balachandran <nbalacha at redhat.com> changed:

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--- Comment #1 from Nithya Balachandran <nbalacha at redhat.com> ---
RCA:

The volume was created with a single brick. On adding a second much larger
brick and running a rebalance, the layout is recalculated for all existing
directories by calling dht_fix_layout_of_directory (). This function generates
a new weighted layout in dht_selfheal_layout_new_directory () but then calls
dht_selfheal_layout_maximize_overlap () on the newly generated layout. This
function does not consider the relative brick sizes and as the original brick
had a complete layout (0x00000000-0xffffffff), the layout is swapped to
maximize the overlap with the old layout.

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