Commit graph

3 commits

Author SHA1 Message Date
Sergei Golubchik
ed008a74cf Make atomic writes general
- Atomic writes are enabled by default
- Automatically detect if device supports atomic write and use it if
  atomic writes are enabled
- Remove ATOMIC WRITE options from CREATE TABLE
  - Atomic write is a device option, not a table options as the table may
    crash if the media changes
- Add support for SHANNON SSD cards
2017-01-11 09:18:35 +02:00
Jan Lindström
ec8257216e Enhancement: Change atomic_writes table option to enum type. Now every file can either use atomic writes, not use it or use default.
SYNTAX: ATOMIC_WRITES=['DEFAULT','ON','OFF']

Idea here is to be able to define innodb_doublewrite = 1 but with following rules:

ATOMIC_WRITES='DEFAULT' - if innodb_use_atomic_writes = 1, we do not write to doublewrite buffer the changes
                          if innodb_use_atomic_writes = 0, we write to doublewrite buffer
ATOMIC_WRITES='ON'      - do not write to doublewrite buffer
ATOMIC_WRITES='OFF'     - write to doublewrite buffer

Note that doublewrite buffer can't be used if innodb_doublewrite = 0.
2014-01-10 12:11:36 +02:00
Jan Lindström
5e55d1ced5 Changes for Fusion-io multi-threaded flush, page compressed tables and
tables using atomic write/table.

This is work in progress and some parts are at most POC quality.
2013-12-19 14:36:38 +02:00