LMDB Command Line Tools
The following describes the command line tools that are available for LMDB.
◆ MDB_NOOVERWRITE
#define MDB_NOOVERWRITE 0x10 |
For put: Don't write if the key already exists.
◆ MDB_NODUPDATA
#define MDB_NODUPDATA 0x20 |
Only for MDB_DUPSORT
For put: don't write if the key and data pair already exist.
For mdb_cursor_del: remove all duplicate data items.
◆ MDB_CURRENT
For mdb_cursor_put: overwrite the current key/data pair
◆ MDB_RESERVE
#define MDB_RESERVE 0x10000 |
For put: Just reserve space for data, don't copy it. Return a pointer to the reserved space.
◆ MDB_APPEND
#define MDB_APPEND 0x20000 |
Data is being appended, don't split full pages.
◆ MDB_APPENDDUP
#define MDB_APPENDDUP 0x40000 |
Duplicate data is being appended, don't split full pages.
◆ MDB_MULTIPLE
#define MDB_MULTIPLE 0x80000 |
Store multiple data items in one call. Only for MDB_DUPFIXED.
◆ mv_size
◆ mv_data
◆ ms_psize
unsigned int MDB_stat::ms_psize |
Size of a database page. This is currently the same for all databases.
◆ ms_depth
unsigned int MDB_stat::ms_depth |
Depth (height) of the B-tree
◆ ms_branch_pages
size_t MDB_stat::ms_branch_pages |
Number of internal (non-leaf) pages
◆ ms_leaf_pages
size_t MDB_stat::ms_leaf_pages |
◆ ms_overflow_pages
size_t MDB_stat::ms_overflow_pages |
◆ ms_entries
size_t MDB_stat::ms_entries |
◆ me_mapaddr
void* MDB_envinfo::me_mapaddr |
◆ me_mapsize
size_t MDB_envinfo::me_mapsize |
Size of the data memory map
◆ me_last_pgno
size_t MDB_envinfo::me_last_pgno |
◆ me_last_txnid
size_t MDB_envinfo::me_last_txnid |
ID of the last committed transaction
◆ me_maxreaders
unsigned int MDB_envinfo::me_maxreaders |
max reader slots in the environment
◆ me_numreaders
unsigned int MDB_envinfo::me_numreaders |
max reader slots used in the environment