[MySQL][Spider]Spider-2.14 released

I'm pleased to announce the release of Spider storage engine version 2.14(beta).
Spider is a Storage Engine for database sharding.

The main changes in this version are following.
- Add table parameter "bulk_update_mode" and "bulk_update_size".
- Add server parameter "spider_bulk_update_mode" and "spider_bulk_update_size".
This parameters are for performance improvement.
Please examine to use "spider_direct_dup_insert", if "REPLACE" and "INSERT IGNORE" are slow.
Please examine to use "spider_bulk_update_mode", if "UPDATE" and "DELETE" are slow.

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


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