My Sites overview (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/ff382643(v=office.14).aspx
Plan for My Sites (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/cc262500(v=office.14).aspx
Set up My Sites (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/ee624362(v=office.14).aspx
Introduction to My Site
http://office.microsoft.com/en-ca/sharepoint-server-help/introduction-to-my-site-HA010108748.aspx
Upgrading MOSS 2007 SSP User Profiles and MySite content to SharePoint Server 2010 using DB-Attach method
http://blogs.msdn.com/b/alimaz/archive/2009/11/08/upgrading-moss-2007-ssp-user-profiles-and-mysite-content-to-sharepoint-server-2010-using-db-attach-method.aspx
How To Migrate SharePoint 2007 My Sites Databases to SharePoint 2010
http://www.mssqltips.com/sqlservertip/2697/how-to-migrate-sharepoint-2007-my-sites-databases-to-sharepoint-2010/
Attach databases and upgrade to SharePoint Server 2010
http://technet.microsoft.com/en-us/library/cc263299(v=office.14).aspx
Database attach upgrade videos (SharePoint Server 2010)
http://technet.microsoft.com/en-us/library/hh315922(v=office.14).aspx
Checklist for database attach upgrade (SharePoint Server 2010)
http://technet.microsoft.com/en-US/library/ff607663(v=office.14).aspx
Perform a database attach upgrade to SharePoint Server 2010
http://technet.microsoft.com/library/cc303436(office.14).aspx
http://mosshowto.blogspot.com/2008/08/moss-2007-farm-search-service-account.html
see also
http://www.cnblogs.com/zyip/archive/2013/04/06/3001999.html