Sun Microsystems, Inc.

Oath Inc.

Verizon Media Inc.

Patrick P Chan

David W Connelly

Methods and apparatus for improving performance of a system including a first computing system are disclosed. In one embodiment, the first computing system receives a request via a network from a client device. The first computing system determines whether a second computing system is available to respond to requests from the first system. The first computing system obtains a response to the request received from the client device based, at least in part, on one or more estimated values maintained by the first computing system according to whether the second computing system is available to respond to requests from the first computing system. The first computing system transmits the response to the client device.

Overall performance when a subsystem becomes overloaded

Disclosed herein is an optimized data interchange system, method and architecture. An original data interchange document, such as a JavaScript&#x2122; Object Notation (JSON) document, comprising a number of name/value pairs is separated, or split, into a template document and a data document for separate transmission. The two documents can be recombined at a destination computing device.

Size-optimized data interchange method and system

A distributed computer system has an information server and a plurality of client computers coupled by one or more communication paths to the information server. The information server includes a database management system (DBMS) with an interface procedure for receiving and responding to SQL statements from client computers. At least one client computer has a database access procedure for sending SQL statements to the DBMS in the information server. The database access procedure includes embedded encrypted SQL statements, representing a predefined subset of a predefined full set of SQL statements recognized as legal SQL statements by the DBMS. For instance, the predefined subset of SQL statement might include only SQL statements for reading data in the DBMS, but not include SQL statements for modifying and adding data to the DBMS. Each of the SQL statements sent by the database access procedure to the DBMS includes a corresponding one of the encrypted SQL statements. The DBMS in the information server includes an interface procedure for processing all SQL statements received from client computers, including a decoding procedure for decoding the encrypted SQL statement included in the SQL statements sent by the database access procedure in the one client computer. The received SQL statement is executed by the DBMS only if the decoded SQL statement is a legal SQL statement. In addition, the interface procedure rejects received SQL statements that do not include an encrypted SQL statement.

System and method for providing safe SQL-level access to a database

In a computer system having a data processing unit, memory, and a multitasking operating system that supports multiple threads of execution in a shared address space, a resource allocation subsystem includes an initialization procedure for initializing monitors, a notify procedure and a wait procedure. Each monitor has an associated event data structure denoting the status of the monitor as Signaled or Unsignaled. Each monitor also stores a waiters value indicating how many threads are waiting on the monitor, a tickets value indicating how many of the threads are to receive notifications, and an epoch counter value. The notify procedure updates any specified monitor to the Signaled status, updates the specified monitor's tickets value to indicate how many waiting threads are to receive notifications, and updates the epoch counter to indicate an epoch value associated with the updating of the specified monitor's status to Signaled. The wait procedure blocks execution of a calling thread until a specified monitor's status is updated to Signaled and the monitor's epoch information indicates an epoch value distinct from the epoch value when the calling thread called the wait procedure. The wait procedure unblocks the calling thread when monitor's tickets value is non-zero, and decrements the tickets value to indicate that the calling thread has consumed one ticket.

Growing community of inventors

Palo Alto, CA, United States of America

Patrick P Chan