com.wiredtiger.db.wiredtiger Class Reference

Inherits com.wiredtiger.db.wiredtigerConstants.

Static Public Member Functions
static String	wiredtiger_strerror (int err)
static Connection	open (String home, String config)
	Open a connection to a database. More...

Additional Inherited Members
Static Public Attributes inherited from com.wiredtiger.db.wiredtigerConstants
static final int	WIREDTIGER_VERSION_MAJOR
static final int	WIREDTIGER_VERSION_MINOR
static final int	WIREDTIGER_VERSION_PATCH
static final String	WIREDTIGER_VERSION_STRING
static final int	WT_DEADLOCK
static final int	WT_DUPLICATE_KEY
static final int	WT_ERROR
static final int	WT_NOTFOUND
static final int	WT_PANIC
static final int	WT_RESTART
static final int	WT_STAT_CONN_BLOCK_BYTE_MAP_READ
static final int	WT_STAT_CONN_BLOCK_BYTE_READ
static final int	WT_STAT_CONN_BLOCK_BYTE_WRITE
static final int	WT_STAT_CONN_BLOCK_MAP_READ
static final int	WT_STAT_CONN_BLOCK_PRELOAD
static final int	WT_STAT_CONN_BLOCK_READ
static final int	WT_STAT_CONN_BLOCK_WRITE
static final int	WT_STAT_CONN_CACHE_BYTES_DIRTY
static final int	WT_STAT_CONN_CACHE_BYTES_INUSE
static final int	WT_STAT_CONN_CACHE_BYTES_MAX
static final int	WT_STAT_CONN_CACHE_BYTES_READ
static final int	WT_STAT_CONN_CACHE_BYTES_WRITE
static final int	WT_STAT_CONN_CACHE_EVICTION_CHECKPOINT
static final int	WT_STAT_CONN_CACHE_EVICTION_CLEAN
static final int	WT_STAT_CONN_CACHE_EVICTION_DIRTY
static final int	WT_STAT_CONN_CACHE_EVICTION_FAIL
static final int	WT_STAT_CONN_CACHE_EVICTION_HAZARD
static final int	WT_STAT_CONN_CACHE_EVICTION_INTERNAL
static final int	WT_STAT_CONN_CACHE_EVICTION_MERGE
static final int	WT_STAT_CONN_CACHE_EVICTION_MERGE_FAIL
static final int	WT_STAT_CONN_CACHE_EVICTION_MERGE_LEVELS
static final int	WT_STAT_CONN_CACHE_EVICTION_SLOW
static final int	WT_STAT_CONN_CACHE_EVICTION_WALK
static final int	WT_STAT_CONN_CACHE_INMEM_SPLIT
static final int	WT_STAT_CONN_CACHE_PAGES_DIRTY
static final int	WT_STAT_CONN_CACHE_PAGES_INUSE
static final int	WT_STAT_CONN_CACHE_READ
static final int	WT_STAT_CONN_CACHE_WRITE
static final int	WT_STAT_CONN_COND_WAIT
static final int	WT_STAT_CONN_CURSOR_CREATE
static final int	WT_STAT_CONN_CURSOR_INSERT
static final int	WT_STAT_CONN_CURSOR_NEXT
static final int	WT_STAT_CONN_CURSOR_PREV
static final int	WT_STAT_CONN_CURSOR_REMOVE
static final int	WT_STAT_CONN_CURSOR_RESET
static final int	WT_STAT_CONN_CURSOR_SEARCH
static final int	WT_STAT_CONN_CURSOR_SEARCH_NEAR
static final int	WT_STAT_CONN_CURSOR_UPDATE
static final int	WT_STAT_CONN_DH_CONN_HANDLES
static final int	WT_STAT_CONN_DH_EVICT_LOCKS
static final int	WT_STAT_CONN_DH_SESSION_HANDLES
static final int	WT_STAT_CONN_DH_SWEEP_EVICT
static final int	WT_STAT_CONN_DH_SWEEPS
static final int	WT_STAT_CONN_FILE_OPEN
static final int	WT_STAT_CONN_LOG_BYTES_USER
static final int	WT_STAT_CONN_LOG_BYTES_WRITTEN
static final int	WT_STAT_CONN_LOG_MAX_FILESIZE
static final int	WT_STAT_CONN_LOG_READS
static final int	WT_STAT_CONN_LOG_SCAN_RECORDS
static final int	WT_STAT_CONN_LOG_SCAN_REREADS
static final int	WT_STAT_CONN_LOG_SCANS
static final int	WT_STAT_CONN_LOG_SLOT_CLOSES
static final int	WT_STAT_CONN_LOG_SLOT_CONSOLIDATED
static final int	WT_STAT_CONN_LOG_SLOT_JOINS
static final int	WT_STAT_CONN_LOG_SLOT_RACES
static final int	WT_STAT_CONN_LOG_SLOT_TOOBIG
static final int	WT_STAT_CONN_LOG_SLOT_TRANSITIONS
static final int	WT_STAT_CONN_LOG_SYNC
static final int	WT_STAT_CONN_LOG_WRITES
static final int	WT_STAT_CONN_LSM_ROWS_MERGED
static final int	WT_STAT_CONN_MEMORY_ALLOCATION
static final int	WT_STAT_CONN_MEMORY_FREE
static final int	WT_STAT_CONN_MEMORY_GROW
static final int	WT_STAT_CONN_READ_IO
static final int	WT_STAT_CONN_REC_PAGES
static final int	WT_STAT_CONN_REC_PAGES_EVICTION
static final int	WT_STAT_CONN_REC_SKIPPED_UPDATE
static final int	WT_STAT_CONN_RWLOCK_READ
static final int	WT_STAT_CONN_RWLOCK_WRITE
static final int	WT_STAT_CONN_SESSION_CURSOR_OPEN
static final int	WT_STAT_CONN_TXN_BEGIN
static final int	WT_STAT_CONN_TXN_CHECKPOINT
static final int	WT_STAT_CONN_TXN_COMMIT
static final int	WT_STAT_CONN_TXN_FAIL_CACHE
static final int	WT_STAT_CONN_TXN_ROLLBACK
static final int	WT_STAT_CONN_WRITE_IO
static final int	WT_STAT_DSRC_BLOCK_ALLOC
static final int	WT_STAT_DSRC_BLOCK_ALLOCSIZE
static final int	WT_STAT_DSRC_BLOCK_CHECKPOINT_SIZE
static final int	WT_STAT_DSRC_BLOCK_EXTENSION
static final int	WT_STAT_DSRC_BLOCK_FREE
static final int	WT_STAT_DSRC_BLOCK_MAGIC
static final int	WT_STAT_DSRC_BLOCK_MAJOR
static final int	WT_STAT_DSRC_BLOCK_MINOR
static final int	WT_STAT_DSRC_BLOCK_SIZE
static final int	WT_STAT_DSRC_BLOOM_COUNT
static final int	WT_STAT_DSRC_BLOOM_FALSE_POSITIVE
static final int	WT_STAT_DSRC_BLOOM_HIT
static final int	WT_STAT_DSRC_BLOOM_MISS
static final int	WT_STAT_DSRC_BLOOM_PAGE_EVICT
static final int	WT_STAT_DSRC_BLOOM_PAGE_READ
static final int	WT_STAT_DSRC_BLOOM_SIZE
static final int	WT_STAT_DSRC_BTREE_COLUMN_DELETED
static final int	WT_STAT_DSRC_BTREE_COLUMN_FIX
static final int	WT_STAT_DSRC_BTREE_COLUMN_INTERNAL
static final int	WT_STAT_DSRC_BTREE_COLUMN_VARIABLE
static final int	WT_STAT_DSRC_BTREE_COMPACT_REWRITE
static final int	WT_STAT_DSRC_BTREE_ENTRIES
static final int	WT_STAT_DSRC_BTREE_FIXED_LEN
static final int	WT_STAT_DSRC_BTREE_MAXIMUM_DEPTH
static final int	WT_STAT_DSRC_BTREE_MAXINTLITEM
static final int	WT_STAT_DSRC_BTREE_MAXINTLPAGE
static final int	WT_STAT_DSRC_BTREE_MAXLEAFITEM
static final int	WT_STAT_DSRC_BTREE_MAXLEAFPAGE
static final int	WT_STAT_DSRC_BTREE_OVERFLOW
static final int	WT_STAT_DSRC_BTREE_ROW_INTERNAL
static final int	WT_STAT_DSRC_BTREE_ROW_LEAF
static final int	WT_STAT_DSRC_CACHE_BYTES_READ
static final int	WT_STAT_DSRC_CACHE_BYTES_WRITE
static final int	WT_STAT_DSRC_CACHE_EVICTION_CHECKPOINT
static final int	WT_STAT_DSRC_CACHE_EVICTION_CLEAN
static final int	WT_STAT_DSRC_CACHE_EVICTION_DIRTY
static final int	WT_STAT_DSRC_CACHE_EVICTION_FAIL
static final int	WT_STAT_DSRC_CACHE_EVICTION_HAZARD
static final int	WT_STAT_DSRC_CACHE_EVICTION_INTERNAL
static final int	WT_STAT_DSRC_CACHE_EVICTION_MERGE
static final int	WT_STAT_DSRC_CACHE_EVICTION_MERGE_FAIL
static final int	WT_STAT_DSRC_CACHE_EVICTION_MERGE_LEVELS
static final int	WT_STAT_DSRC_CACHE_INMEM_SPLIT
static final int	WT_STAT_DSRC_CACHE_OVERFLOW_VALUE
static final int	WT_STAT_DSRC_CACHE_READ
static final int	WT_STAT_DSRC_CACHE_READ_OVERFLOW
static final int	WT_STAT_DSRC_CACHE_WRITE
static final int	WT_STAT_DSRC_COMPRESS_RAW_FAIL
static final int	WT_STAT_DSRC_COMPRESS_RAW_FAIL_TEMPORARY
static final int	WT_STAT_DSRC_COMPRESS_RAW_OK
static final int	WT_STAT_DSRC_COMPRESS_READ
static final int	WT_STAT_DSRC_COMPRESS_WRITE
static final int	WT_STAT_DSRC_COMPRESS_WRITE_FAIL
static final int	WT_STAT_DSRC_COMPRESS_WRITE_TOO_SMALL
static final int	WT_STAT_DSRC_CURSOR_CREATE
static final int	WT_STAT_DSRC_CURSOR_INSERT
static final int	WT_STAT_DSRC_CURSOR_INSERT_BULK
static final int	WT_STAT_DSRC_CURSOR_INSERT_BYTES
static final int	WT_STAT_DSRC_CURSOR_NEXT
static final int	WT_STAT_DSRC_CURSOR_PREV
static final int	WT_STAT_DSRC_CURSOR_REMOVE
static final int	WT_STAT_DSRC_CURSOR_REMOVE_BYTES
static final int	WT_STAT_DSRC_CURSOR_RESET
static final int	WT_STAT_DSRC_CURSOR_SEARCH
static final int	WT_STAT_DSRC_CURSOR_SEARCH_NEAR
static final int	WT_STAT_DSRC_CURSOR_UPDATE
static final int	WT_STAT_DSRC_CURSOR_UPDATE_BYTES
static final int	WT_STAT_DSRC_LSM_CHUNK_COUNT
static final int	WT_STAT_DSRC_LSM_GENERATION_MAX
static final int	WT_STAT_DSRC_LSM_LOOKUP_NO_BLOOM
static final int	WT_STAT_DSRC_REC_DICTIONARY
static final int	WT_STAT_DSRC_REC_OVERFLOW_KEY_INTERNAL
static final int	WT_STAT_DSRC_REC_OVERFLOW_KEY_LEAF
static final int	WT_STAT_DSRC_REC_OVERFLOW_VALUE
static final int	WT_STAT_DSRC_REC_PAGE_DELETE
static final int	WT_STAT_DSRC_REC_PAGE_MERGE
static final int	WT_STAT_DSRC_REC_PAGES
static final int	WT_STAT_DSRC_REC_PAGES_EVICTION
static final int	WT_STAT_DSRC_REC_SKIPPED_UPDATE
static final int	WT_STAT_DSRC_REC_SPLIT_INTERNAL
static final int	WT_STAT_DSRC_REC_SPLIT_LEAF
static final int	WT_STAT_DSRC_REC_SPLIT_MAX
static final int	WT_STAT_DSRC_SESSION_COMPACT
static final int	WT_STAT_DSRC_SESSION_CURSOR_OPEN
static final int	WT_STAT_DSRC_TXN_UPDATE_CONFLICT

Member Function Documentation

static Connection com.wiredtiger.db.wiredtiger.open ( String  home, String  config  )

static

Open a connection to a database.

        ret = wiredtiger_open(home, NULL, "create,cache_size=500M", &conn);

Parameters

	home	The path to the database home directory. See Database Home Directory for more information.
	errhandler	An error handler. If NULL, a builtin error handler is installed that writes error messages to stderr
	config	Configuration string, see Configuration Strings. Permitted values: Name Effect Values buffer_alignment in-memory alignment (in bytes) for buffers used for I/O. The default value of -1 indicates a platform-specific alignment value should be used (4KB on Linux systems, zero elsewhere). an integer between -1 and 1MB; default -1. cache_size maximum heap memory to allocate for the cache. A database should configure either a cache_size or a shared_cache not both. an integer between 1MB and 10TB; default 100MB. checkpoint = ( periodically checkpoint the database. a set of related configuration options defined below.     name the checkpoint name. a string; default "WiredTigerCheckpoint".     wait seconds to wait between each checkpoint; setting this value configures periodic checkpoints. an integer between 1 and 100000; default 0. ) checkpoint_sync flush files to stable storage when closing or writing checkpoints. a boolean flag; default true. create create the database if it does not exist. a boolean flag; default false. direct_io Use O_DIRECT to access files. Options are given as a list, such as "direct_io=[data]". Configuring direct_io requires care, see Direct I/O for important warnings. a list, with values chosen from the following options: "data", "log"; default empty. error_prefix prefix string for error messages. a string; default empty. eviction_dirty_target continue evicting until the cache has less dirty pages than this (as a percentage). Dirty pages will only be evicted if the cache is full enough to trigger eviction. an integer between 10 and 99; default 80. eviction_target continue evicting until the cache becomes less full than this (as a percentage). Must be less than eviction_trigger. an integer between 10 and 99; default 80. eviction_trigger trigger eviction when the cache becomes this full (as a percentage). an integer between 10 and 99; default 95. extensions list of shared library extensions to load (using dlopen). Any values specified to an library extension are passed to WT_CONNECTION::load_extension as the config parameter (for example, extensions=(/path/ext.so={entry=my_entry})). a list of strings; default empty. file_extend file extension configuration. If set, extend files of the set type in allocations of the set size, instead of a block at a time as each new block is written. For example, file_extend=(data=16MB). a list, with values chosen from the following options: "data", "log"; default empty. hazard_max maximum number of simultaneous hazard pointers per session handle. an integer greater than or equal to 15; default 1000. log = ( enable logging. a set of related configuration options defined below.     archive automatically archive unneeded log files. a boolean flag; default true.     enabled enable logging subsystem. a boolean flag; default false.     file_max the maximum size of the log file. an integer between 1MB and 2GB; default 100MB.     path the path to a directory into which the log files are written. If the value is not an absolute path name, the files are created relative to the database home. a string; default "". ) lsm_merge merge LSM chunks where possible. a boolean flag; default true. mmap Use memory mapping to access files when possible. a boolean flag; default true. multiprocess permit sharing between processes (will automatically start an RPC server for primary processes and use RPC for secondary processes). Not yet supported in WiredTiger. a boolean flag; default false. session_max maximum expected number of sessions (including server threads). an integer greater than or equal to 1; default 50. shared_cache = ( shared cache configuration options. A database should configure either a cache_size or a shared_cache not both. a set of related configuration options defined below.     enable whether the connection is using a shared cache. a boolean flag; default false.     chunk the granularity that a shared cache is redistributed. an integer between 1MB and 10TB; default 10MB.     reserve amount of cache this database is guaranteed to have available from the shared cache. This setting is per database. Defaults to the chunk size. an integer; default 0.     name name of a cache that is shared between databases. a string; default pool.     size maximum memory to allocate for the shared cache. Setting this will update the value if one is already set. an integer between 1MB and 10TB; default 500MB. ) statistics Maintain database statistics that may impact performance. a boolean flag; default false. statistics_log = ( log database connection statistics to a file (implies setting the statistics configuration value to true). See Statistics logging for more information. a set of related configuration options defined below.     clear reset statistics counters after each set of log records are written. a boolean flag; default true.     path the pathname to a file into which the log records are written, may contain strftime conversion specifications. If the value is not an absolute path name, the file is created relative to the database home. a string; default "WiredTigerStat.%H".     sources if non-empty, include statistics for the list of data source URIs, if they are open at the time of the statistics logging. The list may include URIs matching a single data source ("table:mytable"), or a URI matching all data sources of a particular type ("table:"). No statistics that require the traversal of a tree are reported, as if the statistics_fast configuration string were set. a list of strings; default empty.     timestamp a timestamp prepended to each log record, may contain strftime conversion specifications. a string; default "%b %d %H:%M:%S".     wait seconds to wait between each write of the log records; setting this value configures statistics and statistics logging. an integer between 1 and 100000; default 0. ) transaction_sync how to sync log records when the transaction commits. a string, chosen from the following options: "dsync", "fsync", "none"; default dsync. use_environment_priv use the WIREDTIGER_CONFIG and WIREDTIGER_HOME environment variables regardless of whether or not the process is running with special privileges. See Database Home Directory for more information. a boolean flag; default false. verbose enable messages for various events. Options are given as a list, such as "verbose=[evictserver,read]". a list, with values chosen from the following options: "block", "ckpt", "evict", "evictserver", "fileops", "hazard", "log", "lsm", "mutex", "overflow", "read", "readserver", "reconcile", "salvage", "shared_cache", "verify", "version", "write"; default empty. Additionally, if a file named WiredTiger.config appears in the WiredTiger home directory, it is read for configuration values (see WiredTiger.config file for details). Configuration values specified in the config argument to the wiredtiger_open function override configuration values specified in the WiredTiger.config file.
[out]	connectionp	A pointer to the newly opened connection handle

Returns

zero on success and a non-zero error code on failure. See Error Returns for details.