MySQL是目前最受欢迎的数据库之一,这种“民望”一直以来都是得利于庞大的开源社区。但是,现在这个社区的一部分成员对开源MySQL现在的发展趋势表示了异议,并对这个开源数据库将来的发展忧心忡忡。危机和问题都来自于Sun已经给MySQL投资的十亿美金。当社区
MySQL是目前最受欢迎的数据库之一,这种“民望”一直以来都是得利于庞大的开源社区。但是,现在这个社区的一部分成员对开源MySQL现在的发展趋势表示了异议,并对这个开源数据库将来的发展忧心忡忡。危机和问题都来自于Sun已经给MySQL投资的十亿美金。当社区成员质疑Sun的用意时,MySQL选择坚守阵地,并为同僚辩护。
就在上周,Sun的MySQL分部预告了MySQL 5.1的发布计划,这款数据库有望在今年六月份登陆市场。实际的发布时期比原来的计划推迟了好几个月,而距离上一个版本MySQL 5.0的发布已经过了两年半。MySQL同时还介绍了目前已经进入Alpha开发阶段的MySQL 6的一些新特性。其中,MySQL 6最引人瞩目的特性是数据库的在线备份。但是,在线备份特性的一部分功能将不会在MySQL社区版本中出现,而只会提供给商用的MySQL企业版。(MySQL提供了一个免费的社区版和一个付费的商业版)。
这一举措已经在一些博客和开源网站Slashdot.org上引发了对MySQL的激烈抨击。这场大爆发的*始于MySQL的顾问Jeremy Cole的一个博客帖子,Cole在帖子中声称,由MySQL开始只在企业版数据库提供一些特性可以看出,MySQL正在改变其开发模式。Cole在帖子中是这样写的,MySQL企业版的用户群规模远小于MySQL社区版,这意味着这些重要特性只能由少数客户进行测试。所以,实际上。他们只会将真正的没有经过测试的源代码交给付费的客户,也就说这些特性的源代码将不再为公众开放。
Cole的观点引起了很多人的共鸣,包括MySQL的顾问Vadim Tkachenko,他也对MySQL的开放性表示了质疑:记得一年前,MySQL Proxy还只是提供给企业客户使用,没有提供给公众广泛应用。所幸的是,去年的时候MySQL还是全面开放了其源代码。现在,我们又看到MySQL数据库的新特性只提供给企业客户。而事实上,Sun更倾向于在开源协议下开发新软件,但MySQL则决定将“选择性”部分开源,将为下一个版本所开发的新特性“封闭”起来。
MySQL前首席执行官,Sun现任高级副总裁Marten Mickos在Slashdot.orgm网站上的一系列帖子中对此进行了辩护,并澄清了MySQL的开源承诺和未来发展定位。
MySQL的发言人Steve Curry则在接受媒体采访时证实了Marten Mickos所发帖子的真实性。目前只将高端的增值特性提供给付费用户看起来是一种有益的模式,MySQL的合作伙伴和客户都觉得这样很好。也有很多用户认可这个做法。当然,并不是所有的人都是这样认为的。MySQL当然希望能够让所有人都满意,但事实上恐怕不能做到。
Mickos还很坚决的表示,MySQL的技术发布计划以及关闭某些技术功能的源代码的决定并没有受到Sun的影响,他指出,MySQL 5.1和6.0的开发计划及其相关的商业决策都是在被Sun收购之前就已经做出的决定,所以和Sun无关。Mickos指出,事实上,Sun还询问过他公司是否应该将所有备份功能的源代码公开,而他在接下来的几个月里会和他的同僚讨论这个问题。
这个事件中所表现的群情激愤在开源社区里并不是什么新鲜的事情,而MySQL只给付费的客户提供特定组分的源代码也不是第一次了。451 Group的分析师Matthew Aslett认为,MySQL以前就曾宣布数据库设计工具MySQL Workbench会有一部分功能的源代码不开放。而在这之前的2006年十月,MySQL也引进了Network Monitoring和Advisory Services的企业版本;此外,在2007年八月,MySQL从社区的FTP下载站点关闭了企业版本源代码的打包下载。
MySQL的发言人Curry指出,MySQL无意“闭源”或削减MySQL服务器的功能。无论是在Sun的旗下还是原来的MySQL,其战略都是围绕着在开源GPL许可下提供全功能的MySQL社区数据库服务器。MySQL的社区版是专门为那些具备一定技术擅长自己动手的开发人员,那些会为了省钱而选择花费一定事件自己为自己提供技术支持的开发人员而设计的。而MySQL的企业版本则是为那些希望能通过多花点钱来获得一些额外服务从而节省时间的企业客户而设计的。
Curry还指出,MySQL的很多决定还没有最终盖棺定论,而且MySQL仍然希望得到客户和社区的反馈。也就是说,MySQL希望能够大家不要受到少数过激声音的煽动,放下成见,并公正公平的讨论这个问题。
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