Boost 1.85 removed some deprecated code in filesystem module which is
still used in columnstore:
- The boost/filesystem/convenience.hpp was removed but columnstore does
not use any functionality from that file except indirect includes.
Therefore this include is removed or replaced with more general
boost/filesystem.hpp. The convenience.hpp header file was deprecated
in filesystem V3 introduced in Boost 1.46.0.
- `normalize` method was removed and users are suggested to replace it
with `lexically_normal` method, which was introduced in Boost 1.60.0.
Original `normalize` call is preserved for backward compatibility with
old Boost version, however`, `lexically_normal` method is preferably
used with Boost 1.60.0 and newer.
- The `copy_option` was removed in favor of `copy_options` (note the
trailing 's'), but enum values were renamed. Namely, `fail_if_exists`
is replaced with `none` and `overwrite_if_exists` is replaced with
`overwrite_existing`. The `copy_options` was introduced in Boost
1.74.0.
New form is used instead, but a backward compatibility layer for Boost
1.73.0 and older was introduced in boost_copy_options_compat.hpp file.
This solution seems to be less awkward than using multiple #if #else
#endif blocks in source code.
* Introduce multigeneration aggregation
* Do not save unused part of RGDatas to disk
* Add IO error explanation (strerror)
* Reduce memory usage while aggregating
* introduce in-memory generations to better memory utilization
* Try to limit the qty of buckets at a low limit
* Refactor disk aggregation a bit
* pass calculated hash into RowAggregation
* try to keep some RGData with free space in memory
* do not dump more than half of rowgroups to disk if generations are
allowed, instead start a new generation
* for each thread shift the first processed bucket at each iteration,
so the generations start more evenly
* Unify temp data location
* Explicitly create temp subdirectories
whether disk aggregation/join are enabled or not
ColumnStore now uses standard bin/lib paths for pretty much everything.
Data path is now hard-coded to /var/lib/columnstore.
This patch also:
* Removes v1 decompression
* Removes a bunch of unneeded files
* Removes COLUMNSTORE_INSTALL_DIR / $INSTALLDIR
* Makes my.cnf.d work for all platforms (MCOL-3558)
* Changes configcpp to use recursive mutex (fixes possible config write deadlock)
* Fixes MCOL-3599 Fix regr functions, The library was installed in the wrong location
* Fixes a bunch of Ubuntu packaging issues
* Changes the binary names of several of the executables so as not to
clash with potential executables from other packages
This patch:
* Moves config files from /usr/local/mariadb/columnstore/etc to
ENGINE_SYSCONFDIR/columnstore (ENGINE_SYSCONFDIR is /etc by default)
* Sets a define called MCSSYSCONFDIR whic contains the
ENGINE_SYSCONFDIR compile time setting
* Modifies scripts and code to use the new paths
* Removes a whole bunch of files we don't use
This fix improves the performance of ExeMgr by doing the following:
* Significantly reduces the amount of time the xml configuration is
scanned
* Uses a much faster way to determine the CPU core count
* Reduces the amount of times certain allocations are executed
* Rowgroup pre-allocates vectors for 1024 rows
This improves performance for the first query of a connection and the
performance for smaller result sets. It may well improve performance in
other areas too.
