Wednesday, March 27, 2013

Q4M now supports MySQL 5.5 / 5.6, an advisory to 0.9.7, 0.9.8 users

Q4M is a message queue implemented as a pluggable storage engine of MySQL.

Thanks to the helps from @laysakura; and @kamipo I have finally added to Q4M support for MySQL 5.5 / 5.6 in 0.9.8.

After releasing 0.9.8 I have noticed that a bug was introduced in 0.9.7 that may cause crashes and/or data losses when accessing tables created under previous versions of Q4M.

If you are using either 0.9.7 or 0.9.8 (that were upgraded from any previous version of Q4M), I recommend you to run the queue_compact(tbl_name) function against all existing Q4M tables to avoid the issue.  Sorry for the inconvenience.

If you are an existing user of 0.9.6 or an earlier version, please upgrade directly to 0.9.9.


--- Japanese Translation (in brief) ---

Q4M 0.9.7 と 0.9.8 には、それら以前のバージョンで作成されたテーブルデータにアクセスが発生した場合に、クラッシュあるいはデータロスが発生する可能性をもつバグが存在します。

このバグは、queue_compact(tbl_name) 関数を全ての Q4M テーブルに対し適用することで回避できますので、いずれかのバージョンをアップグレードとしてインストールした場合は、そうされることを推奨します。

また、0.9.6 以前をお使いの方がアップグレードされる際には、0.9.9 以降へ一気にアップグレードすることをお勧めします。

ご不便をおかけし申し訳ありません。

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