Segment Inode Constants (moved from fsp0fsp.c)

Macros
#define	FSEG_FRAG_ARR_N_SLOTS   (FSP_EXTENT_SIZE / 2)
#define	FSEG_INODE_SIZE    (16 + 3 * FLST_BASE_NODE_SIZE + FSEG_FRAG_ARR_N_SLOTS * FSEG_FRAG_SLOT_SIZE)
#define	FSEG_FRAG_LIMIT   FSEG_FRAG_ARR_N_SLOTS

Typedefs
typedef byte	fseg_inode_t

Functions
static uint32_t	FSP_SEG_INODES_PER_PAGE (page_size_t page_size)

Variables
constexpr uint32_t	FSEG_INODE_PAGE_NODE = FSEG_PAGE_DATA
constexpr uint32_t	FSEG_ARR_OFFSET = FSEG_PAGE_DATA + FLST_NODE_SIZE
constexpr uint32_t	FSEG_ID = 0
constexpr uint32_t	FSEG_NOT_FULL_N_USED = 8
	number of used segment pages in the FSEG_NOT_FULL list More...
constexpr uint32_t	FSEG_FREE = 12
	list of free extents of this segment More...
constexpr uint32_t	FSEG_NOT_FULL = 12 + FLST_BASE_NODE_SIZE
	list of partially free extents More...
constexpr uint32_t	FSEG_FULL = 12 + 2 * FLST_BASE_NODE_SIZE
	list of full extents More...
constexpr uint32_t	FSEG_MAGIC_N = 12 + 3 * FLST_BASE_NODE_SIZE
	magic number used in debugging More...
constexpr uint32_t	FSEG_FRAG_ARR = 16 + 3 * FLST_BASE_NODE_SIZE
	array of individual pages belonging to this segment in fsp fragment extent lists More...
constexpr uint32_t	FSEG_FRAG_SLOT_SIZE = 4
	a fragment page slot contains its page number within space, FIL_NULL means that the slot is not in use More...
constexpr uint32_t	FSEG_MAGIC_N_VALUE = 97937874
double	fseg_reserve_pct
	The segment_reserve_factor is the ratio x/y expressed in percentage, where x is the number of free pages in the segment, and y is the total number of pages in the segment. More...
constexpr double	FSEG_RESERVE_PCT_DFLT = 12.50
constexpr double	FSEG_RESERVE_PCT_MIN = 0.03
constexpr double	FSEG_RESERVE_PCT_MAX = 40.00
constexpr uint32_t	FSEG_FREE_LIST_LIMIT = 40
	If the reserved size of a segment is at least this many extents, we allow extents to be put to the free list of the extent: at most FSEG_FREE_LIST_MAX_LEN many. More...
constexpr uint32_t	FSEG_FREE_LIST_MAX_LEN = 4

Detailed Description

Macro Definition Documentation

FSEG_FRAG_ARR_N_SLOTS

#define FSEG_FRAG_ARR_N_SLOTS   (FSP_EXTENT_SIZE / 2)

FSEG_FRAG_LIMIT

#define FSEG_FRAG_LIMIT   FSEG_FRAG_ARR_N_SLOTS

FSEG_INODE_SIZE

#define FSEG_INODE_SIZE    (16 + 3 * FLST_BASE_NODE_SIZE + FSEG_FRAG_ARR_N_SLOTS * FSEG_FRAG_SLOT_SIZE)

Typedef Documentation

fseg_inode_t

typedef byte fseg_inode_t

Function Documentation

FSP_SEG_INODES_PER_PAGE()

static uint32_t FSP_SEG_INODES_PER_PAGE ( page_size_t  page_size )

inlinestatic

Variable Documentation

FSEG_ARR_OFFSET

constexpr uint32_t FSEG_ARR_OFFSET = FSEG_PAGE_DATA + FLST_NODE_SIZE

constexpr

FSEG_FRAG_ARR

constexpr uint32_t FSEG_FRAG_ARR = 16 + 3 * FLST_BASE_NODE_SIZE

constexpr

array of individual pages belonging to this segment in fsp fragment extent lists

FSEG_FRAG_SLOT_SIZE

constexpr uint32_t FSEG_FRAG_SLOT_SIZE = 4

constexpr

a fragment page slot contains its page number within space, FIL_NULL means that the slot is not in use

FSEG_FREE

constexpr uint32_t FSEG_FREE = 12

constexpr

list of free extents of this segment

FSEG_FREE_LIST_LIMIT

constexpr uint32_t FSEG_FREE_LIST_LIMIT = 40

constexpr

If the reserved size of a segment is at least this many extents, we allow extents to be put to the free list of the extent: at most FSEG_FREE_LIST_MAX_LEN many.

FSEG_FREE_LIST_MAX_LEN

constexpr uint32_t FSEG_FREE_LIST_MAX_LEN = 4

constexpr

FSEG_FULL

constexpr uint32_t FSEG_FULL = 12 + 2 * FLST_BASE_NODE_SIZE

constexpr

list of full extents

FSEG_ID

constexpr uint32_t FSEG_ID = 0

constexpr

FSEG_INODE_PAGE_NODE

constexpr uint32_t FSEG_INODE_PAGE_NODE = FSEG_PAGE_DATA

constexpr

FSEG_MAGIC_N

constexpr uint32_t FSEG_MAGIC_N = 12 + 3 * FLST_BASE_NODE_SIZE

constexpr

magic number used in debugging

FSEG_MAGIC_N_VALUE

constexpr uint32_t FSEG_MAGIC_N_VALUE = 97937874

constexpr

FSEG_NOT_FULL

constexpr uint32_t FSEG_NOT_FULL = 12 + FLST_BASE_NODE_SIZE

constexpr

list of partially free extents

FSEG_NOT_FULL_N_USED

constexpr uint32_t FSEG_NOT_FULL_N_USED = 8

constexpr

number of used segment pages in the FSEG_NOT_FULL list

fseg_reserve_pct

double fseg_reserve_pct

extern

The segment_reserve_factor is the ratio x/y expressed in percentage, where x is the number of free pages in the segment, and y is the total number of pages in the segment.

The number of used pages in the segment is given by (y-x). The number of free pages in the segment (x) will be maintained such that the actual segment_reserve_factor will be >= the requested segment_reserve_factor, which is contained in this variable.

FSEG_RESERVE_PCT_DFLT

constexpr double FSEG_RESERVE_PCT_DFLT = 12.50

constexpr

FSEG_RESERVE_PCT_MAX

constexpr double FSEG_RESERVE_PCT_MAX = 40.00

constexpr

FSEG_RESERVE_PCT_MIN

constexpr double FSEG_RESERVE_PCT_MIN = 0.03

constexpr