google appengine 产品路线图更新

最近appengine team 悄然更新了roadmap页面. 最新的roadmap显示, 在未来半年内会推出以下功能(Most of these features here are intended to be launched within the following six months):

• Service for storing and serving large files
• Incoming email support
• Support for mapping operations across datasets
• Cursors for continuing results of Datastore queries past the 1000 entity limit
• Alerting system for exceptions in your application
• Datastore dump and restore facility

看来search 功能还遥遥无期啊. 除此之外还是挺令人期待的. 比如说大文件功能, 说不定可以自己用gae 做个图片上传和外链服务, 或者弄文件上传/同步服务, 象dropbox 这样的? 还有, datastore 查询最多1000条的限制也会通过cursor 支持得到突破.

另外'Support for mapping operations across datasets" 不知道具体指什么, 是MapReducce 中的map吗? 希望有了解的同学指教.

作为对比, 可以看看appengine team 之前两次发布的roadmap(来自google appengine 官方blog):

Feb 2009:

• Support for running scheduled tasks
• Task queues for performing background processing
• Ability to receive and process incoming email
• Support for sending and receiving XMPP (Jabber) messages

Oct 2008:

• Service for storing and serving large files
• Datastore import and export utility for large-scale databases
• Billing: developers can pay for more resource usage
• Support for a new runtime language
• Uptime monitoring site

可以看到除了去年10月份的"Service for storing and serving large files" 被推迟到这次的roadmap 以外, 其他的feature 都如期发布了.