The HeapDatabaseConfig type exposes the following members.
Constructors
Name | Description | |
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HeapDatabaseConfig |
Instantiate a new HeapDatabaseConfig object
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Methods
Name | Description | |
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Equals | (Inherited from Object.) | |
GetHashCode |
Serves as a hash function for a particular type.
(Inherited from Object.) | |
GetType |
Gets the Type of the current instance.
(Inherited from Object.) | |
MaxSize |
Set the maximum on-disk database file size used by the database. Attempts
to update or create records in a database that have reached this file size
limit throw a HeapFullException. If this value is not set,
the database file size can grow infinitely.
| |
SetEncryption |
Set the password and algorithm used by the Berkeley DB library to
perform encryption and decryption.
(Inherited from DatabaseConfig.) | |
ToString | (Inherited from Object.) |
Fields
Name | Description | |
---|---|---|
AutoCommit |
Enclose the open call within a transaction. If the call succeeds,
the open operation is recoverable and all subsequent database
modification operations based on this handle will be transactionally
protected. If the call fails, no database has been created.
(Inherited from DatabaseConfig.) | |
BlobDir |
Deprecated. Replaced by ExternalFileDir.
| |
ByteOrder |
The byte order for integers in the stored database metadata. The
host byte order of the machine where the Berkeley DB library was
compiled is the default value.
(Inherited from DatabaseConfig.) | |
CacheSize |
The size of the shared memory buffer pool (the cache).
(Inherited from DatabaseConfig.) | |
Creation |
The policy for how to handle database creation.
| |
DoChecksum |
If true, do checksum verification of pages read into the cache from
the backing filestore.
(Inherited from DatabaseConfig.) | |
Env |
The Berkeley DB environment within which to create a database. If
null, the database is created stand-alone; it is not
part of any Berkeley DB environment.
(Inherited from DatabaseConfig.) | |
ErrorFeedback |
The mechanism for reporting error messages to the application.
(Inherited from DatabaseConfig.) | |
ErrorPrefix |
The prefix string that appears before error messages issued by
Berkeley DB.
(Inherited from DatabaseConfig.) | |
ExternalFileDir |
The path of the directory where external files are stored.
If the database is opened within DatabaseEnvironment, this path setting will be ignored during Open(String, HeapDatabaseConfig). Use ExternalFileDir to identify the current storage location of external files after opening the database. | |
Feedback | ||
FreeThreaded |
Causes the database object to be free-threaded; that is, concurrently
usable by multiple threads in the address space.
(Inherited from DatabaseConfig.) | |
MessagePrefix |
The prefix string that appears before informational messages issued
by Berkeley DB.
(Inherited from DatabaseConfig.) | |
NoMMap |
Do not map this database into process memory.
(Inherited from DatabaseConfig.) | |
NonDurableTxns |
If true, Berkeley DB does not write log records for this database.
(Inherited from DatabaseConfig.) | |
NoWaitDbExclusiveLock |
Configuration of BaseDatabase handle to obtain a write
lock on the entire database.
(Inherited from DatabaseConfig.) | |
Priority |
The cache priority for pages referenced by the database.
(Inherited from DatabaseConfig.) | |
ReadOnly |
Open the database for reading only. Any attempt to modify items in
the database will fail, regardless of the actual permissions of any
underlying files.
(Inherited from DatabaseConfig.) | |
ReadUncommitted |
Support transactional read operations with degree 1 isolation.
(Inherited from DatabaseConfig.) | |
Truncate |
Physically truncate the underlying file, discarding all previous databases it might have held.
(Inherited from DatabaseConfig.) | |
UseMVCC |
Open the database with support for multiversion concurrency control.
(Inherited from DatabaseConfig.) |
Properties
Name | Description | |
---|---|---|
BlobThreshold |
Deprecated. Replaced by ExternalFileThreshold.
| |
EncryptAlgorithm |
The algorithm used to perform encryption and decryption.
(Inherited from DatabaseConfig.) | |
Encrypted |
Encrypt the database using the cryptographic password specified by
DatabaseConfig.SetEncryption or
DatabaseEnvironmentConfig.SetEncryption.
(Inherited from DatabaseConfig.) | |
EncryptionPassword |
The password used to perform encryption and decryption.
(Inherited from DatabaseConfig.) | |
ExternalFileThreshold |
The size in bytes which is used to determine when a data item
will be stored as an external file.
Any data item that is equal to or larger in size than the threshold value is automatically stored as an external file. If the threshold value is 0, external files are never used by the database. It is illegal to enable external file support in the database which is configured as in-memory database or with duplicates, sorted duplicates, compression, multiversion concurrency control and transactional read operations with degree 1 isolation. | |
MaxSizeBytes |
The bytes component of the maximum on-disk database file size.
| |
MaxSizeGBytes |
The gigabytes component of the maximum on-disk database file size.
| |
PageSize |
The size of the pages used to hold items in the database, in bytes.
(Inherited from DatabaseConfig.) | |
RegionSize |
The number of pages in a region of the database. If this value is
never set, the default region size for the database's page size is
used. You can set the database page size using
PageSize.
If the database already exists, this value is ignored. If the
specified region size is larger than the maximum region size for the
database's page size, an error is returned when
Open(String, DatabaseConfig) is called. The maximum allowable region
size is included in the error message.
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