libmdbx/ChangeLog.md

v0.9.x (in the development):

• TODO: Native bindings for C++.
• TODO: Packages for AltLinux, Fedora/RHEL, Debian/Ubuntu.
• Support multi-opening the same DB in a process with SysV locking (BSD).

v0.8.1 2020-06-12:

• Minor change versioning. The last number in version now mean the number of commits since last release/tag.
• Provide ChangeLog file.
• Fix for using libmdbx as C-only sub-project with CMake.
• Fix mdbx_env_set_geometry() for case it called from opened environment outside of write transaction.
• Add support for huge transactions and MDBX_HUGE_TRANSACTIONS build-option (default OFF).
• Refine LTO (link time optimization) for clang.
• Force enabling exceptions handling for MSVC (/EHsc option).

v0.8.0 2020-06-05:

• Support for Android/Bionic.
• Support for iOS.
• Auto-handling MDBX_NOSUBDIR while opening for any exists database.
• Engage github-actions to make release-assets.
• Clarify API description.
• Extended keygen-cases in stochastic test.
• Fix fetching of first/lower key from LEAF2-page during page merge.
• Fix missing comma in array of error messages.
• Fix div-by-zero while copy-with-compaction for non-resizeable environment.
• Fixes & enhancements for custom-comparators.
• Fix MDBX_AVOID_CRT option and missing ntdll.def.
• Fix mdbx_env_close() to work correctly called concurrently from several threads.
• Fix null-deref in an ASAN-enabled builds while opening environment with error and/or read-only.
• Fix AddressSanitizer errors after closing environment.
• Fix/workaround to avoid GCC 10.x pedantic warnings.
• Fix using ENODATA for FreeBSD.
• Avoid invalidation of DBI-handle(s) when it just closing.
• Avoid using pwritev() for single-writes (up to 10% speedup for some kernels & scenarios).
• Avoiding MDBX_UTTERLY_NOSYNC as result of flags merge.
• Add mdbx_dbi_dupsort_depthmask() function.
• Add MDBX_CP_FORCE_RESIZEABLE option.
• Add deprecated MDBX_MAP_RESIZED for compatibility.
• Add MDBX_BUILD_TOOLS option (default ON).
• Refine mdbx_dbi_open_ex() to safe concurrently opening the same handle from difference threads.
• Truncate clk-file during environment closing. So zero-length lck file indicates that environment was closed properly.
• Refine mdbx_update_gc() for huge transactions with small sizes of database page.
• Extends dump/load to support all MDBX attributes.
• Avoid upsertion the same key-value data, fix related assertions.
• Rework min/max length checking for keys & values.
• Checking the order of keys on all pages during checking.
• Support CFLAGS_EXTRA make-option for convenience.
• Preserve last txnid while copy with compactification.
• Auto-reset running transaction in mdbx_txn_renew().
• Automatically abort errored transaction in mdbx_txn_commit().
• Auto-choose pagesize for a large databases.
• Rearrange source files, rework build, options-support by CMake.
• Crutch for WSL1 (Windows subsystem for Linux).
• Refine install/uninstall targets.
• Support for Valgrind 3.14 and later.
• Add check-analyzer check-ubsan check-asan check-leak targets to Makefile.
• Minor fix/workaround to avoid UBSAN traps for memcpy(ptr, NULL, 0).
• Avoid some GCC-analyzer false-positive warnings.

v0.7.0 2020-03-18:

• Workarounds for Wine (Windows compatibility layer for Linux).
• MDBX_MAP_RESIZED renamed to MDBX_UNABLE_EXTEND_MAPSIZE.
• Clarify API description, fix typos.
• Speedup runtime checks in debug/checked builds.
• Added checking for read/write transactions overlapping for the same thread, added MDBX_TXN_OVERLAPPING error and MDBX_DBG_LEGACY_OVERLAP option.
• Added mdbx_key_from_jsonInteger(), mdbx_key_from_double(), mdbx_key_from_float(), mdbx_key_from_int64() and mdbx_key_from_int32() functions. See mdbx.h for description.
• Fix compatibility (use zero for invalid DBI).
• Refine/clarify error messages.
• Avoids extra error messages "bad txn" from mdbx_chk when DB is corrupted.

v0.6.0 2020-01-21:

• Fix mdbx_load utility for custom comparators.
• Fix checks related to MDBX_APPEND flag inside mdbx_cursor_put().
• Refine/fix dbi_bind() internals.
• Refine/fix handling STATUS_CONFLICTING_ADDRESSES.
• Rework MDBX_DBG_DUMP option to avoid disk I/O performance degradation.
• Add built-in help to test tool.
• Fix mdbx_env_set_geometry() for large page size.
• Fix env_set_geometry() for large pagesize.
• Clarify API description & comments, fix typos.

v0.5.0 2019-12-31:

• Fix returning MDBX_RESULT_TRUE from page_alloc().
• Fix false-positive ASAN issue.
• Fix assertion for MDBX_NOTLS option.
• Rework MADV_DONTNEED threshold.
• Fix mdbx_chk utility for don't checking some numbers if walking of B-tree was disabled.
• Use page's mp_txnid for basic integrity checking.
• Add MDBX_FORCE_ASSERTIONS built-time option.
• Rework MDBX_DBG_DUMP to avoid performance degradation.
• Rename MDBX_NOSYNC to MDBX_SAFE_NOSYNC for clarity.
• Interpret ERROR_ACCESS_DENIED from OpenProcess() as 'process exists'.
• Avoid using FILE_FLAG_NO_BUFFERING for compatibility with small database pages.
• Added install section for CMake.

v0.4.0 2019-12-02:

• Support for Mac OSX, FreeBSD, NetBSD, OpenBSD, DragonFly BSD, OpenSolaris, OpenIndiana (AIX and HP-UX pending).
• Use bootid for decisions of rollback.
• Counting retired pages and extended transaction info.
• Add MDBX_ACCEDE flag for database opening.
• Using OFD-locks and tracking for in-process multi-opening.
• Hot backup into pipe.
• Support for cmake & amalgamated sources.
• Fastest internal sort implementation.
• New internal dirty-list implementation with lazy sorting.
• Support for lazy-sync-to-disk with polling.
• Extended key length.
• Last update transaction number for each sub-database.
• Automatic read ahead enabling/disabling.
• More auto-compactification.
• Using -fsanitize=undefined and -Wpedantic options.
• Rework page merging.
• Nested transactions.
• API description.
• Checking for non-local filesystems to avoid DB corruption.