摘要:
Systems, methods and computer products for a security framework to reduce on-line computer exposure. Exemplary embodiments include a computer security method, including initiating a computer session on a first computer, receiving a grace period entry into the first computer, monitoring mouse and keyboard on the first computer activity during the computer session, monitoring long-running jobs initiated on the first computer during the computer session, monitoring authorized computer access of a plurality of computers to the first computer, determining which computers of the plurality of computers can access the first computer and for what time period and terminating computer traffic related to the first computer in response to an expiration of the grace period.
摘要:
An apparatus and method is described for improving access to mostly read data on network servers. The preferred embodiments more efficiently utilize replicated data servers to minimize server response time for improved performance of data access to network servers by workload managing client requests across the primary server and all replicated servers when it is possible to do so. In preferred embodiments, a load balancer supplies the most current data for mostly read data transactions while maximizing server usage by workload managing client requests across the primary server and all replicated servers. Client requests are managed by a load balancer in the workload manager. Client requests are sent by the load balancer to replicated servers when a routing table (stale data marker list) indicates that the data is in a safe period. Clients are directed exclusively to the primary server only during data update times.
摘要:
In an embodiment, data is partitioned into partitions, which are divided into levels. The levels are ordered by creation times of the levels. A request is received at a current partition, which includes a key that identifies a field in a record and a value for the key. A determination is made whether the value exists in the field in the current partition. If the determination is false, a message is sent from the current partition to a next-older partition, and the message instructs the next-older partition to move the record with the value from the next-older partition to the current partition. If the determination is true, the record with the value in the field is moved from the current partition to a next-newer partition if the next-newer partition sent the request, and the record is deleted from the current partition.
摘要:
An apparatus and method is described for improving access to mostly read data on network servers. The preferred embodiments more efficiently utilize replicated data servers to minimize server response time for improved performance of data access to network servers by workload managing client requests across the primary server and all replicated servers when it is possible to do so. In preferred embodiments, a load balancer supplies the most current data for mostly read data transactions while maximizing server usage by workload managing client requests across the primary server and all replicated servers. Client requests are managed by a load balancer in the workload manager. Client requests are sent by the load balancer to replicated servers when a routing table (stale data marker list) indicates that the data is in a safe period. Clients are directed exclusively to the primary server only during data update times.
摘要:
A system and method for handling client service requests. In one embodiment, a client service request containing a content request directive and request context data is received at a server-side client interface. A request callback object containing the content request directive and the request context is generated. The callback object is issued to a connection agent that interfaces an auxiliary content channel and a transaction service. Responsive to the connection agent receiving the callback object, an asynchronous service request comprising the content request directive is issued to the transaction service and the callback object is registered with the auxiliary content channel. The auxiliary content channel retrieves auxiliary content that has been selected and prioritized in accordance with the request content. The retrieved auxiliary content is sent during servicing of the asynchronous service request by the transaction service. Responsive to retrieval of data satisfying the content request directive, the sending of retrieved auxiliary content is suspending and the data satisfying the content request directive is sent to the server-side client interface.
摘要:
A method for handling service requests in a data processing system is disclosed. In response to a service request, a priority of the service request is determined by mapping a context of the service request to a service level agreement (SLA). SLA-aware and timeout-conscious and preemptive and replayable lock manager is designed to account for different operational goals and different importance to satisfy various SLAs. An average processing time of the service request is then calculated based on statistical results. The service request will be allowed to process if the determined average processing time meets historical guarantee situations.
摘要:
A method, apparatus, system, and signal-bearing medium that, in an embodiment, receive a change request from a first client at a first time, where the change request includes a key that identifies a field in a data object. A determination is made that the first client changed the field identified by the key at a second time that is before the first time and that a second client changed the field identified at a third time that is after the second time and before the first time, and the key is sent to the second client. The client receives the key, and in various embodiments invalidates the key in a cache or removes the key from the cache. In an embodiment, the data value of the change request is also sent to the second client, which updates the cache with the data value. In this way, stale data in a cache at a client is either updated or removed.
摘要:
A method, apparatus, system, and signal-bearing medium that, in an embodiment, route requests to servers based on a synchronization level of data that the servers provide. In an embodiment, synchronization levels that servers provide are determined, a synchronization level that a request requires is determined, a server is selected based on the provided synchronization levels and the required synchronization level, and the request is routed to the selected server. The selection of the server may include selecting a subset of the servers, ordering the subset based on the provided synchronization levels, and selecting the highest synchronization level that is processing less than a threshold number of requests. In various embodiments, the provided synchronization levels are determined based on probabilities that data changes are synchronized between the servers based on distributions of propagation time delays of data changes between the servers, based on distributions of elapsed times between data changes, and based on both distributions.
摘要:
An apparatus, program product and method utilize on-demand propagation of routing information to reduce the overhead associated with distributing routing information throughout a distributed computing system. The staleness of the routing information utilized in routing client requests for a particular client is gauged based upon the number and/or frequency of client requests issued for that client that require rerouting, e.g., as indicated in responses returned in response to the client requests. Once the reroutes of client requests meet a desired propagation criterion, updated routing information is then requested for the client.
摘要:
A method, system and computer program product manages a batch processing job by: partitioning the batch processing job for execution in a plurality of batch execution servers from a cluster of computers; designating one computer from the cluster as a primary command server that oversees and coordinates execution of the batch processing job; selecting a second computer from the cluster to serve as a failover command server; storing an object data grid structure in the primary command server; replicating the object grid structure to create and store a replicated object grid structure in the failover command server; in response to the primary command server failing, restarting, by the failover command server, execution of batch processes from the batch processing job in the plurality of batch execution servers utilizing objects within the replicated object grid structure, and executing the batch processes with processing states at the time of the failover.