[MySQL][Spider]Spider storage engine 0.13 released

I'm pleased to announce the release of Spider storage engine version 0.13.(beta)

The main changes in this version are following.
- Add table parameter "crd_bg_mode" and "sts_bg_mode".
- Add server parameter "spider_crd_bg_mode" and "spider_sts_bg_mode".
  MySQL needs table's analysis informations when select statement is executed. Spider storage engine gets this informations from remote table but this action often generates over-heads.
  This options remove generated over-heads by getting analysis informations at background but you must set this option to 0 if the table's analysis informations change frequently.
  * There are other options for the over-heads reduction of the analysis informations acquisition. I will introduce this at another time.

Please see "99_change_logs.txt" in the download documents for checking other changes.


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