Lines Matching refs:zones
25 host-managed disk with 256 MB zones, dm-zoned memory usage per disk
26 instance is at most 4.5 MB and as little as 5 zones will be used
38 write accesses to the sequential zones of a zoned block device.
39 Conventional zones are used for caching as well as for storing internal
42 in zones with the same size as the zoned block device. These zones will be
43 placed in front of the zones from the zoned block device and will be handled
44 just like conventional zones.
46 The zones of the device(s) are separated into 2 types:
48 1) Metadata zones: these are conventional zones used to store metadata.
49 Metadata zones are not reported as usable capacity to the user.
51 2) Data zones: all remaining zones, the vast majority of which will be
52 sequential zones used exclusively to store user data. The conventional
53 zones of the device may be used also for buffering user random writes.
54 Data in these zones may be directly mapped to the conventional zone, but
78 blocks in the data zones follows the mapping table. A valid block is
105 After some time, the limited number of conventional zones available may
106 be exhausted (all used to map chunks or buffer sequential zones) and
108 situation, a reclaim process regularly scans used conventional zones and
109 tries to reclaim the least recently used zones by copying the valid
118 system crash, 2 sets of metadata zones are used. One set, the primary
168 Information about the internal layout and current usage of the zones can
177 0 <size> zoned <nr_zones> zones <nr_unmap_rnd>/<nr_rnd> random <nr_unmap_seq>/<nr_seq> sequential
179 where <nr_zones> is the total number of zones, <nr_unmap_rnd> is the number
180 of unmapped (ie free) random zones, <nr_rnd> the total number of zones,
181 <nr_unmap_seq> the number of unmapped sequential zones, and <nr_seq> the
182 total number of sequential zones.
185 percent free random zones. In order to start the reclaim process manually
193 will start the reclaim process and random zones will be moved to sequential
194 zones.