Customizing the session storage mechanism to avoid conversation-keeping problems _php tips

PHP Server session in the way of file storage, when the user access is too large, session file will be very much, and when the lateral increase of the servers, the sessions file can not be synchronized, facing the problem of conversation maintenance.

The following two solutions are available:

1. Take out a separate server using NFS or Samba file sharing, sharing session files, you can solve the problem of synchronization when load balancing. (but can not solve the problem of efficiency, tens of thousands of session files, lookup will be slower)

2. Session storage database, other servers can be shared by the database server, solve the conversation problem, while the database also solves the problem of file efficiency. The database can be scaled horizontally, and the speed and quantity problems can be solved.