Describes the parameters of an spdk_reduce_vol. More...
#include <reduce.h>
Data Fields | |
| struct spdk_uuid | uuid |
| uint32_t | backing_io_unit_size |
| Size in bytes of the IO unit for the backing device. | |
| uint32_t | logical_block_size |
| Size in bytes of a logical block. | |
| uint32_t | chunk_size |
| Size in bytes of a chunk on the compressed volume. | |
| uint64_t | vol_size |
| Total size in bytes of the compressed volume. | |
| uint32_t | comp_level |
| Compression algorithm, when creating initialization, it is specified by the user. | |
| uint8_t | comp_algo |
| Compression algorithm, when creating initialization, it is specified by the user. | |
| uint8_t | reserved [2] |
| uint8_t | meta_builtin |
| struct spdk_reduce_meta_desc | meta_region_desc [REDUCE_MTYPE_NR] |
| uint64_t | data_region_off |
Detailed Description
Describes the parameters of an spdk_reduce_vol.
Field Documentation
◆ backing_io_unit_size
| uint32_t spdk_reduce_vol_params::backing_io_unit_size |
Size in bytes of the IO unit for the backing device.
This is the unit in which space is allocated from the backing device, and the unit in which data is read from of written to the backing device. Must be greater than 0.
◆ chunk_size
| uint32_t spdk_reduce_vol_params::chunk_size |
Size in bytes of a chunk on the compressed volume.
This is the unit in which data is compressed. Must be an even multiple of backing_io_unit_size and logical_block_size. Must be greater than 0.
◆ logical_block_size
| uint32_t spdk_reduce_vol_params::logical_block_size |
Size in bytes of a logical block.
This is the unit in which users read or write data to the compressed volume. Must be greater than 0.
◆ vol_size
| uint64_t spdk_reduce_vol_params::vol_size |
Total size in bytes of the compressed volume.
During initialization, the size is calculated from the size of backing device size, so this must be set to 0 in the structure passed to spdk_reduce_vol_init(). After initialization, or a successful load, this field will contain the total size which will be an even multiple of the chunk size.
The documentation for this struct was generated from the following file: