前篇文章分析了Google Urchin的统计代码，接下来这篇就是来学习Google 是怎样来储存数据的。以下为Google Urchin的数据库字典，由ysy协助整理完成。Google Urchin共有以下表：

uaccounts
uaccounts_permissions

ucosts
ucosts_permissions
ucosts_queue
ucosts_queue_permissions
ucosts_tasks
ucosts_tasks_permissions

ufilters
ufilters_permissions

ugeo_tasks
ugeo_tasks_permissions

uglobals
uglobals_permissions
ugoals
ugoals_permissions

ugroups
ugroups_permissions
ugroups_uusers
ugroups_uusers_permissions

ulogs
ulogs_permissions
ulogs_ufilters
ulogs_ufilters_permissions

uprofiles
uprofiles_permissions
uprofiles_queue
uprofiles_queue_permissions
uprofiles_tasks
uprofiles_tasks_permissions
uprofiles_ucosts
uprofiles_ucosts_permissions
uprofiles_ufilters
uprofiles_ufilters_permissions
uprofiles_ugroups
uprofiles_ugroups_permissions
uprofiles_ulogs
uprofiles_ulogs_permissions
uprofiles_uusers
uprofiles_uusers_permissions

usegments
usegments_permissions
usessions
usessions_permissions

uupdate_tasks
uupdate_tasks_permissions
uusers
uusers_permissions 

具体请下载PDF查看：http://vdisk.weibo.com/s/mqMa