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Author SHA1 Message Date
Леонид Юрьев (Leonid Yuriev)
d01e44db0c
mdbx: release v0.11.5 
The stable release with the hotfix/workaround for a flaw of Linux 4.19 (at least) unified page/buffer cache.
See [issue#269](https://github.com/erthink/libmdbx/issues/269) for more information.

Acknowledgements:
-----------------

 - [Simon Leier](https://github.com/leisim) for reporting and testing.
 - [Kai Wetlesen](https://github.com/kaiwetlesen) for [RPMs](http://copr.fedorainfracloud.org/coprs/kwetlesen/libmdbx/).
 - [Tullio Canepa](https://github.com/canepat) for reporting C++ API issue and contributing.

Fixes:
------

 - [Added workaround](https://github.com/erthink/libmdbx/issues/269) for a flaw of Linux 4.19 (at least) unified page/buffer cache.
 - [Fixed/Reworked](https://github.com/erthink/libmdbx/pull/270) move-assignment operators for "managed" classes of C++ API.
 - Fixed potential `SIGSEGV` while open DB with overrided non-default page size.
 - [Made](https://github.com/erthink/libmdbx/issues/267) `mdbx_env_open()` idempotence in failure cases.
 - Refined/Fixed pages reservation inside `mdbx_update_gc()` to avoid non-reclamation in a rare cases.
 - Fixed typo in a retained space calculation for the hsr-callback.

Minors:
-------

 - Reworked functions for meta-pages, split-off non-volatile.
 - Disentangled C11-atomic fences/barriers and pure-functions (with `__attribute__((__pure__))`) to avoid compiler misoptimization.
 - Fixed hypotetic unaligned access to 64-bit dwords on ARM with `__ARM_FEATURE_UNALIGNED` defined.
 - Reasonable paranoia that makes clarity for code readers.
 - Minor fixes Doxygen references, comments, descriptions, etc.

Signed-off-by: Леонид Юрьев (Leonid Yuriev) <leo@yuriev.ru>
 2022-02-23 20:06:30 +03:00
Леонид Юрьев (Leonid Yuriev)
daa7f04f61
mdbx: release v0.11.4 
The stable release with fixes for large and huge databases sized of 4..128 TiB.

Acknowledgements:
-----------------

 - Ledgerwatch, Binance and Positive Technologies teams for reporting, assistance in investigation and testing.
 - Alex Sharov for reporting, testing and provide resources for remote debugging/investigation.
 - Kris Zyp for Deno support.

New features, extensions and improvements:
------------------------------------------

 - Added treating the `UINT64_MAX` value as maximum for given option inside `mdbx_env_set_option()`.
 - Added `to_hex/to_base58/to_base64::output(std::ostream&)` overloads without using temporary string objects as buffers.
 - Added `--geometry-jitter=YES|no` option to the test framework.
 - Added support for [Deno](https://deno.land/) support by [Kris Zyp](https://github.com/kriszyp).

Fixes:
------

 - Fixed handling `MDBX_opt_rp_augment_limit` for GC's records from huge transactions (Erigon/Akula/Ethereum).
 - [Fixed](https://github.com/erthink/libmdbx/issues/258) build on Android (avoid including `sys/sem.h`).
 - [Fixed](https://github.com/erthink/libmdbx/pull/261) missing copy assignment operator for `mdbx::move_result`.
 - Fixed missing `&` for `std::ostream &operator<<()` overloads.
 - Fixed unexpected `EXDEV` (Cross-device link) error from `mdbx_env_copy()`.
 - Fixed base64 encoding/decoding bugs in auxillary C++ API.
 - Fixed overflow of `pgno_t` during checking PNL on 64-bit platforms.
 - [Fixed](https://github.com/erthink/libmdbx/issues/260) excessive PNL checking after sort for spilling.
 - Reworked checking `MAX_PAGENO` and DB upper-size geometry limit.
 - [Fixed](https://github.com/erthink/libmdbx/issues/265) build for some combinations of versions of  MSVC and Windows SDK.

Minors:
-------

 - Added workaround for CLANG bug [D79919/PR42445](https://reviews.llvm.org/D79919).
 - Fixed build test on Android (using `pthread_barrier_t` stub).
 - Disabled C++20 concepts for CLANG < 14 on Android.
 - Fixed minor `unused parameter` warning.
 - Added CI for Android.
 - Refine/cleanup internal logging.
 - Refined line splitting inside hex/base58/base64 encoding to avoid `\n` at the end.
 - Added workaround for modern libstdc++ with CLANG < 4.x
 - Relaxed txn-check rules for auxiliary functions.
 - Clarified a comments and descriptions, etc.
 - Using the `-fno-semantic interposition` option to reduce the overhead to calling self own public functions.

Signed-off-by: Леонид Юрьев (Leonid Yuriev) <leo@yuriev.ru>
 2022-02-02 20:56:28 +03:00
Leonid Yuriev
03d828834b mdbx: schedule the release of v0.11.4 for 2022-01-28. 2022-01-21 15:43:17 +03:00
Leonid Yuriev
c588af6aca mdbx: update Copyright year. 
Change-Id: Ib3e4c0ac94882c4b2a1e167dd98e6e26dbdf48a4
 2022-01-17 11:06:14 +03:00
Леонид Юрьев (Leonid Yuriev)
aa1f6fbd5f
mdbx: release v0.10.0 
Acknowledgements:
-----------------
 - [Mahlon E. Smith](https://github.com/mahlonsmith) for [Ruby bindings](https://rubygems.org/gems/mdbx/).
 - [Alex Sharov](https://github.com/AskAlexSharov) for [mdbx-go](https://github.com/torquem-ch/mdbx-go), bug reporting and testing.
 - [Artem Vorotnikov](https://github.com/vorot93) for bug reporting and PR.
 - [Paolo Rebuffo](https://www.linkedin.com/in/paolo-rebuffo-8255766/), [Alexey Akhunov](https://github.com/AlexeyAkhunov) and Mark Grosberg for donations.
 - [Noel Kuntze](https://github.com/Thermi) for preliminary [Python bindings](https://github.com/Thermi/libmdbx/tree/python-bindings)

New features:
-------------
 - Added `mdbx_env_set_option()` and `mdbx_env_get_option()` for controls
   various runtime options for an environment (announce of this feature  was missed in a previous news).
 - Added `MDBX_DISABLE_PAGECHECKS` build option to disable some checks to reduce an overhead
   and detection probability of database corruption to a values closer to the LMDB.
   The `MDBX_DISABLE_PAGECHECKS=1` provides a performance boost of about 10% in CRUD scenarios,
   and conjointly with the `MDBX_ENV_CHECKPID=0` and `MDBX_TXN_CHECKOWNER=0` options can yield
   up to 30% more performance compared to LMDB.
 - Using float point (exponential quantized) representation for internal 16-bit values
   of grow step and shrink threshold when huge ones (https://github.com/erthink/libmdbx/issues/166).
   To minimize the impact on compatibility, only the odd values inside the upper half
   of the range (i.e. 32769..65533) are used for the new representation.
 - Added the `mdbx_drop` similar to LMDB command-line tool to purge or delete (sub)database(s).
 - [Ruby bindings](https://rubygems.org/gems/mdbx/) is available now by [Mahlon E. Smith](https://github.com/mahlonsmith).
 - Added `MDBX_ENABLE_MADVISE` build option which controls the use of POSIX `madvise()` hints and friends.
 - The internal node sizes were refined, resulting in a reduction in large/overflow pages in some use cases
   and a slight increase in limits for a keys size to ≈½ of page size.
 - Added to `mdbx_chk` output number of keys/items on pages.
 - Added explicit `install-strip` and `install-no-strip` targets to the `Makefile` (https://github.com/erthink/libmdbx/pull/180).
 - Major rework page splitting (af9b7b560505684249b76730997f9e00614b8113) for
     - An "auto-appending" feature upon insertion for both ascending and
       descending key sequences. As a result, the optimality of page filling
       increases significantly (more densely, less slackness) while
       inserting ordered sequences of keys,
     - A "splitting at middle" to make page tree more balanced on average.
 - Added `mdbx_get_sysraminfo()` to the API.
 - Added guessing a reasonable maximum DB size for the default upper limit of geometry (https://github.com/erthink/libmdbx/issues/183).
 - Major rework internal labeling of a dirty pages (958fd5b9479f52f2124ab7e83c6b18b04b0e7dda) for
   a "transparent spilling" feature with the gist to make a dirty pages
   be ready to spilling (writing to a disk) without further altering ones.
   Thus in the `MDBX_WRITEMAP` mode the OS kernel able to oust dirty pages
   to DB file without further penalty during transaction commit.
   As a result, page swapping and I/O could be significantly reduced during extra large transactions and/or lack of memory.
 - Minimized reading leaf-pages during dropping subDB(s) and nested trees.
 - Major rework a spilling of dirty pages to support [LRU](https://en.wikipedia.org/wiki/Cache_replacement_policies#Least_recently_used_(LRU))
   policy and prioritization for a large/overflow pages.
 - Statistics of page operations (split, merge, copy, spill, etc) now available through `mdbx_env_info_ex()`.
 - Auto-setup limit for length of dirty pages list (`MDBX_opt_txn_dp_limit` option).
 - Support `make options` to list available build options.
 - Support `make help` to list available make targets.
 - Silently `make`'s build by default.
 - Preliminary [Python bindings](https://github.com/Thermi/libmdbx/tree/python-bindings) is available now
   by [Noel Kuntze](https://github.com/Thermi) (https://github.com/erthink/libmdbx/issues/147).

Backward compatibility break:
-----------------------------
 - The `MDBX_AVOID_CRT` build option was renamed to `MDBX_WITHOUT_MSVC_CRT`.
   This option is only relevant when building for Windows.
 - The `mdbx_env_stat()` always, and `mdbx_env_stat_ex()` when called with the zeroed transaction parameter,
   now internally start temporary read transaction and thus may returns `MDBX_BAD_RSLOT` error.
   So, just never use deprecated `mdbx_env_stat()' and call `mdbx_env_stat_ex()` with transaction parameter.
 - The build option `MDBX_CONFIG_MANUAL_TLS_CALLBACK` was removed and now just a non-zero value of
   the `MDBX_MANUAL_MODULE_HANDLER` macro indicates the requirement to manually call `mdbx_module_handler()`
   when loading libraries and applications uses statically linked libmdbx on an obsolete Windows versions.

Fixes:
------
 - Fixed performance regression due non-optimal C11 atomics usage (https://github.com/erthink/libmdbx/issues/160).
 - Fixed "reincarnation" of subDB after it deletion (https://github.com/erthink/libmdbx/issues/168).
 - Fixed (disallowing) implicit subDB deletion via operations on `@MAIN`'s DBI-handle.
 - Fixed a crash of `mdbx_env_info_ex()` in case of a call for a non-open environment (https://github.com/erthink/libmdbx/issues/171).
 - Fixed the selecting/adjustment values inside `mdbx_env_set_geometry()` for implicit out-of-range cases (https://github.com/erthink/libmdbx/issues/170).
 - Fixed `mdbx_env_set_option()` for set initial and limit size of dirty page list ((https://github.com/erthink/libmdbx/issues/179).
 - Fixed an unreasonably huge default upper limit for DB geometry (https://github.com/erthink/libmdbx/issues/183).
 - Fixed `constexpr` specifier for the `slice::invalid()`.
 - Fixed (no)readahead auto-handling (https://github.com/erthink/libmdbx/issues/164).
 - Fixed non-alloy build for Windows.
 - Switched to using Heap-functions instead of LocalAlloc/LocalFree on Windows.
 - Fixed `mdbx_env_stat_ex()` to returning statistics of the whole environment instead of MainDB only (https://github.com/erthink/libmdbx/issues/190).
 - Fixed building by GCC 4.8.5 (added workaround for a preprocessor's bug).
 - Fixed building C++ part for iOS <= 13.0 (unavailability of  `std::filesystem::path`).
 - Fixed building for Windows target versions prior to Windows Vista (`WIN32_WINNT < 0x0600`).
 - Fixed building by MinGW for Windows (https://github.com/erthink/libmdbx/issues/155).

TODO for a next releases:
-------------------------
 - [Get rid of dirty-pages list in MDBX_WRITEMAP mode](https://github.com/erthink/libmdbx/issues/193).
 - [Large/Overflow pages accounting for dirty-room](https://github.com/erthink/libmdbx/issues/192).
 - [C++ Buffer issue](https://github.com/erthink/libmdbx/issues/191).
 - Finalize C++ API (few typos and trivia bugs are still likely for now).
 - [Support for RAW devices](https://github.com/erthink/libmdbx/issues/124).
 - [Test framework issue](https://github.com/erthink/libmdbx/issues/127).
 - [Support MessagePack for Keys & Values](https://github.com/erthink/libmdbx/issues/115).
 - [Engage new terminology](https://github.com/erthink/libmdbx/issues/137).
 - Packages for [Astra Linux](https://astralinux.ru/), [ALT Linux](https://www.altlinux.org/), [ROSA Linux](https://www.rosalinux.ru/), Fedora/RHEL, Debian/Ubuntu.
 2021-05-09 03:01:59 +03:00
Leonid Yuriev
f01e0efc2d mdbx-tools: add mdbx_drop tool. 
Change-Id: Ib7b32668c13fcef5951ff7250df57b3263e14d69
 2021-03-13 15:45:15 +03:00