Lines Matching full:groups

35 For all other block groups, there is no padding.
39 superblock and group descriptors are written to some of the block groups
41 not all block groups necessarily host a redundant copy (see following
59 groups (flex_bg). Leftover space is used for file data blocks, indirect
62 Flexible Block Groups
65 Starting in ext4, there is a new feature called flexible block groups
66 (flex_bg). In a flex_bg, several block groups are tied together as one
69 and inode tables of all other block groups in the flex_bg. For example,
71 superblock, group descriptors, data block bitmaps for groups 0-3, inode
72 bitmaps for groups 0-3, inode tables for groups 0-3, and the remaining
76 and group descriptors are always at the beginning of block groups, even
77 if flex_bg is enabled. The number of block groups that make up a
80 Meta Block Groups
86 can have at most 2^27/64 = 2^21 block groups. This limits the entire
92 groups. Each metablock group is a cluster of block groups whose group
95 includes 64 block groups, or 8 GiB of disk space. The metablock group
99 each metablock group. This increases the 2^21 maximum block groups limit
106 groups in a meta-block group. A meta-block group is a collection of
107 block groups which can be described by a single block group descriptor
109 bytes, a meta-block group contains 16 block groups for filesystems with
110 a 1KB block size, and 64 block groups for filesystems with a 4KB