Patent application number | Description | Published |
20080267193 | TECHNIQUE FOR ENABLING NETWORK STATISTICS ON SOFTWARE PARTITIONS - A computer implemented method, data processing system, and computer program product for enabling network statistics to be collected per software partition. When an incoming data packet is received at the Internet Protocol (IP) layer of an operating system, the IP address in the incoming data packet is identified. The IP address in the incoming data packet is then compared against IP addresses stored in a hash table, wherein the hash table maps each IP address in the hash table to a software partition of the operating system. If an IP address in the hash table matches the IP address in the data packet, the software partition mapped to the located IP address in the hash table is identified. Network statistics collected for the incoming data packet are then associated with the software partition. | 10-30-2008 |
20080270422 | IN-FLIGHT FILE DESCRIPTORS CHECKPOINT - A computer implemented method, data processing system, and computer program product for enabling the restoration of in-flight file descriptors during a checkpoint operation. Responsive to a checkpoint operation being initiated on a process in a workload partition, in-flight file pointers in an in-flight file queue on a socket bound to the process are identified. A file descriptor is instantiated in the process file table of the process for each identified in-flight file pointer in the in-flight file queue. After completion of the checkpoint operation, the in-flight file queue on the socket may be reconstructed in a restore operation using the instantiated file descriptors. | 10-30-2008 |
20080270829 | CHECKPOINT OF APPLICATIONS USING UNIX® DOMAIN SOCKETS - A computer implemented method, apparatus, and computer program product for managing state data in a workload partitioned environment. Process state data for a process in a workload partition is saved. Process state data is used to restore the process to a given state. State data associated with open sockets and open files bound to the first process is saved. In response to a determination that the process is associated with a domain socket that is bound to a socket file, an absolute pathname for the socket file is saved. A domain socket associated with a connecting process in the workload partition uses the socket file to connect to a domain socket associated with a listening process in the same workload partition to enable the two processes to communicate with each other. | 10-30-2008 |
20080294537 | METHOD TO SUPPORT ADVANCE ACCOUNTING WITHIN SOFTWARE PARTITIONS - A data processing system includes: a plurality of resources including a processor, a memory, and an operating system; a mechanism for generating one or more software partitions in addition to an administrative partition; and a global accounting engine which enables monitoring and recording of resource usage at both a global-level and a partition-level. Partition-level accounting data is returned for selected resources being utilized within a software partition. The data processing system also includes a first software partition, which utilizes one or more of the first plurality of resources and which includes a first partition-level accounting engine. The partition-level accounting engine provides monitoring and recording of resource usage within the first software partition and stores first partition usage data within a first partition accounting buffer. | 11-27-2008 |
20080294787 | CREATING A CHECKPOINT FOR MODULES ON A COMMUNICATIONS STREAM - A computer implemented method, computer program product, and system for creating a checkpoint of a stream. A stream checkpoint request to create the checkpoint of the stream is received, wherein the stream is used by a process as a communications path, and wherein the communications path is modified by a set of modules. In response to identifying the identity of each module in the set of modules, the identity of each module in the set of modules is stored in the checkpoint. In response to identifying an order of the set of modules, the order of the set of modules is stored in the checkpoint. In response to sending a stream checkpoint message to each module in the set of modules, module data is received from each module in the set of modules to form received module data. The received module data is stored in the checkpoint. | 11-27-2008 |
20090037550 | METHOD AND APPARATUS FOR CHECKPOINT AND RESTART OF PSEUDO TERMINALS - A computer implemented method, apparatus, and computer program product for restarting pseudo terminal streams. In one embodiment, a device associated with a file descriptor in a set of file descriptors is opened. The set of file descriptors are identified in checkpoint data for restarting the pseudo terminal streams. In response to identifying the device as a pseudo terminal slave device, an entry for the identified pseudo terminal slave device is added to a list of open pseudo terminal slave devices. The entry for the identified pseudo terminal slave device is marked as an open pseudo terminal slave device. The list of open pseudo terminal slave devices permit pseudo terminal master devices and pseudo terminal slave devices to be restored and restarted in random order during a restart of the pseudo terminal streams. | 02-05-2009 |
20090094445 | PROCESS RETEXT FOR DYNAMICALLY LOADED MODULES - A computer implemented method, apparatus, and computer program product for dynamically loading a module into an application address space. In response to receiving a checkpoint signal by a plurality of threads associated with an application running in a software partition, the plurality of threads rendezvous to a point outside an application text associated with the application. Rendezvousing the plurality of threads suspends execution of application text by the plurality of threads. The application text is moved out of an application address space for the application to form an available application address space. The available application address space is an address space that was occupied by the application text. A software module is moved into the available application address space. | 04-09-2009 |
20090094582 | CHECKPOINT AND RESTARTABLE APPLICATIONS AND SYSTEM SERVICES - A computer implemented method, apparatus, and computer program product for checkpoint and restart of a process. In one embodiment, a process shell representing a restartable process is created on an arrival server in response to identifying a process on a departure server that is a restartable process. The process shell is frozen. A name of the restartable process, an identifier of the restartable process, and an identifier of a parent process of the restartable process is assigned to the process shell. The process shell is then unfrozen and exits. A parent process restarts the restartable process when the process shell exits. | 04-09-2009 |
20090112965 | PRESERVATION OF FILE LOCKS DURING CHECKPOINT AND RESTART OF A MOBILE SOFTWARE PARTITION - A computer-implemented method, apparatus, and computer-usable program code for preserving file locks while moving a software partition from an origination network file system client data processing system to a destination network file system client data processing system is provided. A request for a file is received. A determination is made as to whether the request is for a file that is within a software partition. Responsive to a determination that the request is for a file within a software partition, a determination is made as to whether the request is a lock request. Responsive to a determination that the request is a lock request, a determination is made as to whether the software partition is being restarted. Responsive to a determination that the software partition is being restarted, the lock request is blocked from being sent to a remote network file system server. | 04-30-2009 |
20090112969 | CHECKPOINT AND RESTART OF NFS VERSION 2/VERSION 3 CLIENTS WITH NETWORK STATE PRESERVATION INSIDE A WORKLOAD PARTITION (WPAR) - Exemplary embodiments provide a computer implemented method, apparatus, and computer-usable program code for moving a software partition from an origination network file system client data processing system to a destination network file system client data processing system. Responsive to receiving a request to perform a checkpoint operation on a software partition, network file system related mount information for the software partition is gathered. Determined ports of a network are unblocked. Unwritten data on the origination network file system client data processing system is synchronized with a remote network file system server. The network is re-blocked. A checkpoint file is generated and stored. The checkpoint file is sent to the destination network file system data processing system. | 04-30-2009 |
20090248887 | EXPORT OF METADATA STREAMS TO APPLICATIONS - The present invention provides a computer storage server implemented method for generating attribute streams. The storage server receives a request from an application to write data to at least one storage object, the request having a request type. The storage server then updates an attribute stream with metadata associated with the at least one storage object. The storage server also updates the attribute stream with the at least one checksum, such that the attribute stream is associated with the at least one storage object. The storage server determines the request type to be one selected from among the group consisting of an email type, a file transfer protocol type, and a hypertext transfer protocol type. Responsive to a determination that the request type is among one selected from the group consisting of an email type, a file transfer protocol type, and a hypertext transfer protocol type, the storage server verifies the application. Based on the determination of the request type, the storage server then updates the attribute stream by applying a filter among one selected from the group consisting of an email attribute stream filter, file transfer protocol attribute stream filter and a hypertext transfer protocol attribute stream filter. | 10-01-2009 |
20100082816 | VIRTUALIZE, CHECKPOINT, AND RESTART POSIX IPC OBJECTS DURING CHECKPOINTING AND RESTARTING OF A SOFTWARE PARTITION - A WPAR is migrated. Responsive to starting a checkpoint process, data and control information is collected and stored for IPC objects in the WPAR. Responsive to receiving a request to restart the WPAR, a type of IPC object is determined. Responsive to a determination that the IPC object is not an IPC shared memory object, a kernel handle that a process wants to be used for a new IPC object is registered. A request to create a new IPC object comprising a name uniquely associated with the IPC object and a WPAR identifier is issued. An entry that matches the name and WPAR identifier is identified and a virtual kernel handle is retrieved. The new IPC object is created. The virtual kernel handle is mapped to a real kernel handle and returned to the process. Data and control information is retrieved and overlaid onto the new IPC object. | 04-01-2010 |
20100083283 | VIRTUALIZE, CHECKPOINT, AND RESTART SYSTEM V IPC OBJECTS DURING CHECKPOINTING AND RESTARTING OF A SOFTWARE PARTITION - Migrating a workload partition (WPAR) is provided. Responsive to receiving a request to checkpoint the WPAR, a list of virtual identifiers used by the WPAR to refer to IPC objects is generated and stored. Each virtual identifier corresponds to an IPC object and to a real identifier used by a kernel that corresponds to the IPC object. IPC object data and control information is collected and stored. Each process in the WPAR stores per process data. Responsive to receiving a request to restart the WPAR, the virtual identifier that the WPAR wants to be used is registered. A new IPC object is created by a kernel. The kernel maps a real identifier used by the kernel for the new IPC object to the registered virtual identifier. The restart process retrieves IPC data and control information and overlays it on the new IPC object. The per process data is restored. | 04-01-2010 |
20100325471 | HIGH AVAILABILITY SUPPORT FOR VIRTUAL MACHINES - A computer implemented method, a tangible computer storage medium, and a data processing system provide high availability support for virtual machines in a logical partitioned platform. A monitoring system detect a failure in the virtual machine. Partition management firmware then restarts the virtual machine in a consistency failover image node utilizing a consistency failover image. If a subsequent failure of the virtual machine is detected within a predetermined time, partition management firmware restarts the virtual machine in a boot failover image node utilizing a boot failover image. | 12-23-2010 |
20120204148 | MANAGING AN APPLICATION SOFTWARE PARTITION - A computer implemented method, apparatus, and computer usable program code for managing a software partition in logical partitioned data processing system. A virtual root process is created for the software partition, wherein the virtual root process functions as a root process for the software partition. The set of child processes is re-parented to the virtual root process in response to termination of a process having a set of child processes. | 08-09-2012 |