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43d5edf97c
commit 394d0712d3d46a87a8063e14e998e9c22336e3a6
Author: Anca Agape <anca@fb.com>
Date: Thu Jul 27 15:43:07 2017 -0700
Fix rpl.rpl_4threads_deadlock test broken by D5005670
Summary:
In D5005670 in fill_fields_processlist() function we introduced a point
where we were trying to take the LOCK_thd_data before the
synchronization point used by test
processlist_after_LOCK_thd_count_before_LOCK_thd_data. This was
happening in get_attached_srv_session() function called. Replaced this
with get_attached_srv_session_safe() and moved it after lock is aquired.
Reviewed By: tianx
Differential Revision: D5505992
fbshipit-source-id: bc53924
50 lines
2.4 KiB
Text
50 lines
2.4 KiB
Text
== Summary ==
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This directory contains RocksDB-based Storage Engine (RDBSE) for MySQL,
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also known as "MyRocks".
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== Resources ==
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https://github.com/facebook/mysql-5.6/wiki/Getting-Started-with-MyRocks
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https://www.facebook.com/groups/MyRocks/
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== Coding Conventions ==
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The baseline for MyRocks coding conventions for the code in storage/rocksdb/
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is based on the default clang format with a few minor changes. The file
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storage/rocksdb/.clang-format describes conventions and can be integrated
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with Vim or Emacs as described here:
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http://releases.llvm.org/3.6.0/tools/clang/docs/ClangFormat.html#vim-integration
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All code outside of storage/rocksdb/ should conform to the MySQL coding
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conventions:
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http://dev.mysql.com/doc/internals/en/coding-guidelines.html.
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Several refinements:
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0. There is an umbrella C++ namespace named "myrocks" for all MyRocks code.
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1. We introduced "RDB" as the super-short abbreviation for "RocksDB". We will
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use it as a name prefix, with different capitalization (see below), to ease
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up code navigation with ctags and grep.
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N.B. For ease of matching, we'll keep the variables and functions dealing
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with sysvars as close as possible to the outside visible names of
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sysvars, which start with "rocksdb_" prefix, the outward storage
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engine name.
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2. The names for classes, interfaces, and C++ structures (which act as
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classes), start with prefix "Rdb_".
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NB: For historical reasons, we'll keep the "ha_<storage_engine_name>" class
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name for ha_rocksdb class, which is an exception to the rule.
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3. The names for global objects and functions start with prefix "rdb_".
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4. The names for macros and constants start with prefix "RDB_".
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5. Regular class member names start with "m_".
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6. Static class member names start with "s_".
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7. Given the 80 character per line limit, we'll not always use full English
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words in names, when a well known or easily recognizable abbreviation
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exists (like "tx" for "transaction" or "param" for "parameter" etc).
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8. When needing to disambiguate, we use different suffixes for that, like
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"_arg" for a function argument/parameter, "_arr" for a C style array, and
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"_vect" for a std::vector etc.
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== Running Tests ==
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To run tests from rocksdb, rocksdb_rpl or other rocksdb_* packages, use the
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following parameters:
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--default-storage-engine=rocksdb
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--skip-innodb
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--default-tmp-storage-engine=MyISAM
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--rocksdb
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