amotin commented on this pull request.
> @@ -1039,6 +1039,13 @@ metaslab_group_allocatable(metaslab_group_t *mg,
> metaslab_group_t *rotor,
if (mg->mg_no_free_space)
return (B_FALSE);
+ /*
+ * Relax allocation throttling for ditto blocks. Due to
+ * random imbalances in allocation it tends to push copies
+ * to one vdev, that looks a bit better at the moment.
+ */
+ qmax = qmax * (4 + d) / 4;
I haven't tested that much, neither I would expect there easily reproducible
difference. It was only a thought that it could make code less depending on
specific values I put here.
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