daos_recx_t Struct Reference

#include <daos_obj.h>

Data Fields
uint64_t	rx_idx
uint64_t	rx_nr

Detailed Description

Record

A record is an atomic blob of arbitrary length which is always fetched/updated as a whole. The size of a record can change over time. A record is uniquely identified by the following composite key:

• the distribution key (aka dkey) denotes a set of arrays co-located on the same storage targets. The dkey has an arbitrary size.
• the attribute key (aka akey) distinguishes individual arrays. Likewise, the akey has a arbitrary size.
• the index within an array discriminates individual records. The index is an integer that ranges from zero to infinity. A range of indices identifies a contiguous set of records called extent. All records inside an extent must have the same size. A record extent is a range of contiguous records of the same size inside an array. rx_idx is the first array index of the extent and rx_nr is the number of records covered by the extent.

Definition at line 336 of file daos_obj.h.

Field Documentation

rx_idx

uint64_t rx_idx

Indice of the first record in the extent

Definition at line 338 of file daos_obj.h.

rx_nr

uint64_t rx_nr

Number of contiguous records in the extent If rx_nr is equal to 1, the extent is composed of a single record at indice rx_idx

Definition at line 344 of file daos_obj.h.

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The documentation for this struct was generated from the following file:

• src/include/daos_obj.h