Abstract: The present teaching relates to a system, method, medium for a data system, which comprises a plurality of data centers with one read/write master server designated to handle write and consistent read requests and a plurality of read master servers designated to handle normal read requests, wherein the master servers form a ring structure and each is connected to a corresponding slave server. When a data access request is received, a read master communication unit invokes one of the plurality of read master servers in the data system if the received data access request is a normal read request, a main master communication unit invokes the read/write master server if the received data access request is either a write request or a consistent read request. When a response is received from the invoked handling master server, a response processing unit responds to the data access request based on the received response.

Abstract: The present teaching relates to a system, method, medium for a data system, which comprises a plurality of data centers with one read/write master server designated to handle write and consistent read requests and a plurality of read master servers designated to handle normal read requests, wherein the master servers form a ring structure and each is connected to a corresponding slave server. When a data access request is received, a read master communication unit invokes one of the plurality of read master servers in the data system if the received data access request is a normal read request, a main master communication unit invokes the read/write master server if the received data access request is either a write request or a consistent read request. When a response is received from the invoked handling master server, a response processing unit responds to the data access request based on the received response.

Abstract: The present teaching relates to a system, method, medium for a data system, which comprises a plurality of data centers with one read/write master server designated to handle write and consistent read requests and a plurality of read master servers designated to handle normal read requests, wherein the master servers form a ring structure and each is connected to a corresponding slave server. When a data access request is received, a read master communication unit invokes one of the plurality of read master servers in the data system if the received data access request is a normal read request, a main master communication unit invokes the read/write master server if the received data access request is either a write request or a consistent read request. When a response is received from the invoked handling master server, a response processing unit responds to the data access request based on the received response.

Abstract: The present teaching relates to a system, method, medium for a data system, which comprises a plurality of data centers with one read/write master server designated to handle write and consistent read requests and a plurality of read master servers designated to handle normal read requests, wherein the master servers form a ring structure and each is connected to a corresponding slave server. When a data access request is received, a read master communication unit invokes one of the plurality of read master servers in the data system if the received data access request is a normal read request, a main master communication unit invokes the read/write master server if the received data access request is either a write request or a consistent read request. When a response is received from the invoked handling master server, a response processing unit responds to the data access request based on the received response.

Abstract: The present teaching relates to a system, method, medium for a data system, which comprises a plurality of data centers with one read/write master server designated to handle write and consistent read requests and a plurality of read master servers designated to handle normal read requests, wherein the master servers form a ring structure and each is connected to a corresponding slave server. When a data access request is received, a read master communication unit invokes one of the plurality of read master servers in the data system if the received data access request is a normal read request, a main master communication unit invokes the read/write master server if the received data access request is either a write request or a consistent read request. When a response is received from the invoked handling master server, a response processing unit responds to the data access request based on the received response.

Abstract: The present teaching relates to a system, method, medium for a data system, which comprises a plurality of data centers with one read/write master server designated to handle write and consistent read requests and a plurality of read master servers designated to handle normal read requests, wherein the master servers form a ring structure and each is connected to a corresponding slave server. When a data access request is received, a read master communication unit invokes one of the plurality of read master servers in the data system if the received data access request is a normal read request, a main master communication unit invokes the read/write master server if the received data access request is either a write request or a consistent read request. When a response is received from the invoked handling master server, a response processing unit responds to the data access request based on the received response.

Abstract: An indication is generated of desirability of user's activity relative to a website that includes a plurality of web pages. Indications of the user's activity with respect to the plurality of web pages are processed. At least a portion of the indications are of user's activity with respect to the website other than a conversion activity with respect to the website. Based on the processed indications, generating an overall indication of desirability of the user's activity with respect to the web site. Theses steps may be repeated for a plurality of users. Each user's activity may be categorized (not based on the determined overall indication of desirability), and a measure of the quality of the category determination may be determined using the determined overall indications of desirability.