linux/crush/crush.h

99  * A bucket is a named container of other items (either devices or
100  * other buckets).  Items within a bucket are chosen using one of a
105  *  Bucket Alg     Speed       Additions    Removals
144  * Replacement weights for each item in a bucket. The size of the
145  * array must be exactly the size of the straw2 bucket, just as the
157  * Replacement weights and ids for a given straw2 bucket, for
160  * When crush_do_rule() chooses the Nth item from a straw2 bucket, the
185  * Replacement weights and ids for each bucket in the crushmap. The
190  * an item from the bucket __map->buckets[N]__ bucket, provided it
191  * is a straw2 bucket.
199 	struct crush_choose_arg *args; /*!< replacement for each bucket
294 	 * allowed bucket algs is a bitmask, here the bit positions
298 	 * minimize confusion (bucket type values start at 1).
304 	/* device/bucket type id -> type name (CrushWrapper::type_map) */
307 	/* device/bucket id -> name (CrushWrapper::name_map) */
344 	__u32 *perm;  /* Permutation of the bucket's items */
348 	struct crush_work_bucket **work; /* Per-bucket working store */