Lines Matching full:permutation

51  * permutation mapping is applied to the order of the dRAID children.
73  * which contain the target number of groups. The permutation mappings
141  *    permutation numbers and drive offsets is more complicated).
143  * N.B. The following array describes all valid dRAID permutation maps.
144  * Each row is used to generate a permutation map for a different number
151  * with a given permutation map) is the ratio of the amounts of I/O that will
153  * imbalance ratio (of a given number of disks and permutation map) is the
429  * once in every row, and the permutation array checksum must match.
469  * Generate the permutation array for the draid_map_t.  These maps control
497 	/* Allocate the permutation array */  in vdev_draid_generate_perms()
557  * Lookup the permutation array and iteration id for the provided offset.
898  * (at position 'start' in permutation number 'perm').
913 	 * in a given permutation.  in vdev_draid_logical_to_physical()
918 	 * We cycle through a disk permutation every groupsz * ngroups chunk  in vdev_draid_logical_to_physical()
923 	 * will be 13, we will change permutation every 2.08GB and each  in vdev_draid_logical_to_physical()
932 	 * the permutation array.  in vdev_draid_logical_to_physical()
945 	 * - within a permutation there are ngroups groups spread over the  in vdev_draid_logical_to_physical()
947 	 * - each permutation has (groupwidth * ngroups) / ndisks rows  in vdev_draid_logical_to_physical()
948 	 * - so each permutation covers rows * slice portion of the disk  in vdev_draid_logical_to_physical()
2367  * parent dRAID configuration.  The last N columns of the dRAID permutation
2604  * the zio->io_offset and permutation table to calculate which child dRAID vdev