Edit File: 3.1.14.html
<!--"$Id--> <html> <head> <title>The Berkeley DB Package: DB 3.1.14 Change Log</title> <meta name="description" content="Berkeley DB: A database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods"> </head> <body bgcolor=white> <h3 align=center>Berkeley DB 3.1.14 Change Log</h3> <h3>Database On-Disk Format Changes:</h3> <ol> <li>The on-disk Btree/Recno format has changed from version 7 to version 8, and the on-disk Hash format has changed from version 6 to version 7. For information on upgrading database formats, see "Upgrading Applications to the 3.1 release" in the Berkeley DB Reference Guide for more information. </ol> <h3>Major New Features:</h3> <ol> <li>Berkeley DB now includes support for VxWorks systems. <li>Off-page duplicates now stored in an on-disk B+tree structure, greatly speeding searches in sorted duplicate sets. In addition, a count of duplicate items is now maintained for all duplicate sets, providing better optimization of logical joins. [#303] <li>New cursor method, DBcursor->c_count, that returns the number of duplicate items associated with the referenced key. [#303] <li>Berkeley DB now includes a RPC-based client/server implementation. [#426] <li>Recovery to a specified time is supported. [#855] <li>New cursor method, DB->verify, that supports database verification and salvage. [#588, #827, #1156] <li>Add a Berkeley DB method to rename databases. [#1492] <li>Significantly increased verbose error output for debugging support. [#1866] </ol> <h3>Interface Additions and Changes:</h3> <ol> <li>All of the Berkeley DB utilities now support the -V option to display the library version. <li>It is now possible to set almost all the Berkeley DB environment configuration options in the environment's DB_CONFIG file. There are new DB_ENV handle methods for setting the database directory, logging directory and temporary file directory. These were previously set using the DB_DATA_DIR, DB_LOG_DIR and DB_TMP_DIR strings in the config argument to the DB_ENV->open and DB_ENV->remove methods. As part of this change, the config argument to the DB_ENV->open and DB_ENV->remove methods has been removed in favor of the new methods. <li>Add a private field to the DBT structure, enabling applications to pass private information into the Btree/Hash comparison/hashing functions. <li>Change the redo parameter of the function passed to the DBENV->set_tx_recover interface used to be an integer set to any one of a number of #defined values. The <b>redo</b> parameter has been replaced by the <b>op</b> parameter, an enumerated type. [#606] <li>Add support for a new DBcursor->c_get flags, DB_NEXT_NODUP (DB_PREV_NODUP), which return the next (previous) key/data pair where the data item is not a duplicate of the current key. [#887, #1985] <li>Modify the DB->put interface, when using the DB_APPEND flag, to support DBT conventions. [#1523] <li>Add DB_NODUPDATA option to the DB->put and DBcursor->c_put methods to disallow duplicate duplicates. [#1866] <li>Add a fast return of approximate row counts for all access methods, add separate key and data statistics for the Hash access method. Regularize the naming scheme for all statistics. [#1978] <li>Move application-wide configuration interfaces from DbEnv method set to static function interfaces. [#2245] </ol> <h3>General Environment Changes:</h3> <ol> <li>It is now possible to build and run Berkeley DB on systems that do not have either of the mmap(2) or shmget(2) interfaces. <li>Take two checkpoints after recovery completes so that on next recovery no work needs to be redone. [#1316] <li>Fix a bug where, if DIAGNOSTIC was #defined, recovery could incorrectly assert that no files should be open and drop core. [#1316] <li>Fix a bug where recovering from deleting a page in a database could cause other operations to not be rolled-forward. [#1532] <li>Fix a bug where HP-UX msemaphore semaphores could cause mutex races on HP-UX 10.XX. [#2199] </ol> <h3>General Access Method Changes:</h3> <ol> <li>Add support for zero-length keys. [#625] <li>Fix a bug where join cursors were not automatically closed when the primary DB handle was closed. [#1325] <li>Fix a bug where the DB->remove method of an entire database would create a backup file even if the application wasn't running with transactions; the backup files were never removed. [#1357] <li>Fix a bug where when adding a new page in a chain of duplicates the LSN of a page could be unnecessarily updated, confusing recovery. [#1412] <li>Fix a bug where creating a subdatabase ignored the specification of a non-standard page size. [#1422] <li>Fix a bug where join cursors didn't correctly support DB_DBT_XXX flags. [#1639] <li>Fix bugs in join cursor handling of DBTs, and associated memory leaks. [#1777, #1929, #1940] <li>Change error return for duplicate duplicates from EINVAL to DB_KEYEXIST. [#1866] <li>Fix a bug where DB handles opened in threaded environments were not themselves automatically threaded. [#1943] <li>Fix a bug where the DB->remove method could leak memory. [#2066] </ol> <h3>Btree Access Method Changes:</h3> <ol> <li>Increase the accuracy of the returned statistics count for Btree key and data items. <li>Fix a bug where the next page in the leaf page chain might not be updated during recovery. [#1320] <li>Fix a bug where Btrees supporting retrieval by record number could become corrupted for some data sets. [#1663] <li>Fix a bug where Btrees supporting retrieval by record number could have incorrect record counts after reverse splits. [#1688] <li>Fix a bug where keys stored as overflow items could be incorrectly compared. [#1994] </ol> <h3>Hash Access Method Changes:</h3> <ol> <li>Fix a bug where partial puts in the hash access method could lead to heap corruption. [#1300] <li>Fix a bug where duplicate data items were not correctly identified during logging and could be incorrectly restored during recovery. [#1377] </ol> <h3>Queue Access Method Changes:</h3> <ol> <li>Fix a bug where an invalid lock was acquired when duplicating a cursor in Concurrent Data Store. <li>Fix a bug where EAGAIN could be returned instead of DB_LOCK_DEADLOCK. [#1354] <li>Fix a bug where the Queue Access Method could drop core if a put operation failed. [#1449] <li>Fix a bug where user requests for non-blocking locks were ignored. [#1970] </ol> <h3>Recno Access Method Changes:</h3> <blockquote>None.</blockquote> <h3>C++ API Changes:</h3> <ol> <li>Fix a large number of warnings and portability problems for various C++ compilers. <li>Add "void" type to operator = in all examples for portability. <li>Fix a bug where the DB_CXX_NO_EXCEPTIONS in the Db constructor was causing immediate failure of the call. [#1350] <li>Fix problems with disposing of Db and DbEnv objects: the underlying DB, DB_ENV objects were looked at after a close(), which is illegal, since the memory is freed. And in the case where Db::Db() is called with a NULL DbEnv, we create our own DbEnv object, and this was not being deleted on close(). [#1466, #1467, #1468] <li>Fix a bug where Db::remove and Db::upgrade were specified 'static'. [#1469] <li>Fix a bug where memory freed during open/close was written to in the destructor. [#1889] <li>Fix a bug where Db::close and DbEnv::close and their associated destructors interacted wrongly. [#1998] </ol> <h3>Java API Changes:</h3> <ol> <li>Fix a bug where, when building with versions 1.1.* of the JDK, an explicit reference for the CLASSPATH prevented compilation from within MS Visual studio. [#1334] <li>Avoid using true/false as they aren't recognized by older C++ systems (in this case, SPARC Solaris 2.6 with Sun Workshop 4.2). [#1384] <li>Fix a bug where Java could fail to run on Solaris due to memory allocation issues with shared libraries. [#1384] <li>Rewrite the Java API in C for portability reasons (it was previously implemented in C++). [#1384] </ol> <h3>Tcl API Changes:</h3> <ol> <li>The -mpool option to the berkdb env command is now the default. <li>The -txn option to the berkdb env command now implies the -lock and -log options. </ol> <h3>RPC Client/Server Changes:</h3> <blockquote>None.</blockquote> <h3>XA Resource Manager Changes:</h3> <ol> <li>Fix a bug where returned XID fields (currently unused by Tuxedo) were being incorrectly zeroed. [#1840] </ol> <h3>Locking Subsystem Changes:</h3> <ol> <li>Lock objects with waiters are now separately threaded to make deadlock detection faster. [#1983] <li>Fix a bug where locks could be leaked if the DB_LOCK_NOWAIT flag was specified and the lock was already held. [#2072] <li>Add a count of the lock requests that failed because DB_LOCK_NOWAIT was set to the lock region statistics. [#2072] </ol> <h3>Logging Subsystem Changes:</h3> <ol> <li>Fix a bug where logging print routines displayed file IDs as unsigned values instead of signed values. <li>Change the Windows/NT release to no longer pre-allocate logfiles. [#849, #1780] <li>Fix a bug where if you attempt to do catastrophic recovery on a log that spans a crash you can get errors of the form "open: invalid argument". [#1365] <li>Fix a bug where the DB_ARCH_LOG flag to the log_archive interface could fail to return the correct set of log filenames. [#1426] <li>Fix a bug where free'd memory could be accessed in an error path. [#2053] </ol> <h3>Buffer Pool Subsystem Changes:</h3> <ol> <li>Fix a bug where Berkeley DB could fail when too many databases were created in an environment. [#1528] </ol> <h3>Transaction Subsystem Changes:</h3> <ol> <li>Fix a number of bugs in DB file registration that could cause problems if files were repeatedly opened and closed. [#1943] <li>Remove all requirements that applications flush the log before closing the environment to ensure that no additional work needs to be done during recovery. [#2006] <li>Fix a bug where an unthreaded DB handle could be incorrectly used in a threaded environment, during recovery. [#2033] </ol> <h3>Utility Changes:</h3> <ol> <li>Convert the supporting utilities to use common code for signal and process-ID log file handling. [#1596] </ol> <h3>Configuration, Documentation, Portability and Build Changes:</h3> <ol> <li>Upgrade to the current Perl BerkeleyDB and DB_File modules. <li>Upgrade to the current Scriptics Tcl release (8.3), add the --with-tcl option to automatically use the tclConfig.sh information to correctly compile the Tcl API and test suite. <li>Upgrade to current versions of libtool (1.3.4), autoconf and the config scripts. <li>Update the test suite to no longer require a large set of UNIX utilities to run. <li>Convert to CVS/RCS source repository and file revision Ids. <li>Include Windows 2000 support. <li>Support systems without strtoul(3) support. [#1337] <li>Fix a bug where the DB 1.85 API interface was incorrectly named, so configuration scripts wouldn't find "dbopen" and applications wouldn't load. [#1345] <li>Fix a bug where AIX wouldn't compile because there was no MUTEX_INIT macro for the test-and-set mutexes. [#1354] <li>Fix a bug where Berkeley DB incorrectly aligned memory from the shared memory regions for gcc on the UltraSparc. [#1395, #1404] <li>Fix a bug where DB did not correctly build on the Siemens Nixdorf Reliant Unix because the initspin() function was expected to return an int. [#1418] <li>Fix a bug where DB would fail on HP-UX, apparently the HP-UX C library contains pread/pwrite symbols, but they don't work. [#1459] <li>Call GetTempDir() to determine system's temp directory on Windows. [#1478] <li>Fix a case where large buffers could be allocated on the stack when running on Windows, leading to stack resource starvation in multithreaded programs. [#1530] <li>Fix a bug where DB would fail to compile on AIX because of a missing MUTEX_INIT definition. [#1561] <li>Fix a bug where out-of-memory condition when scanning a directory failed to close the directory. [#1872] <li>Remove all use of signal functions. [#1964] <li>Fix a bug where the POSIX fcntl system call would be called even after the underlying Berkeley DB open call had been replaced by the application. [#2114] <li>Fix a bug where the standard free routine was still called when finishing a directory scan, even after the application had replaced the underlying OS functionality. [#2115] </ol> </body> </html>
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