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.