Patent application number | Description | Published |
20090013014 | METHOD, SYSTEM, AND ARTICLE OF MANUFACTURE FOR MIRRORING DATA AT STORAGE LOCATIONS - Provided are a system and article of manufacture for mirroring data. A mirror policy indicating volumes in a first storage system is processed to mirror to volumes in a second storage system and volumes in the second storage system to mirror to volumes in a third storage system. The third storage system is at a first geographical location remote with respect to a second geographical location including the first and second storage systems. A command is transmitted to cause the copying of updates to the volumes in the first storage system to corresponding volumes in the second storage system indicated in the mirror policy. Upon an occurrence of an event, the causing the suspension of the copying of updates to the volumes in the first storage system indicated in the mirroring policy to the volumes in the second storage system. During the suspension of the copying of volumes between the first and second storage systems, causing the copying of updates to the volumes in the second storage system indicated in the mirroring policy to the volumes in the third storage system indicated in the mirroring policy. | 01-08-2009 |
20090019096 | SYSTEM AND ARTICLE OF MANUFACTURE FOR MIRRORING DATA AT STORAGE LOCATIONS - Provided is a system and article of manufacture for mirroring data. A mirror policy indicating volumes in a first storage system is processed to mirror to volumes in a second storage system and volumes in the second storage system to mirror to volumes in a third storage system. The third storage system is at a first geographical location remote with respect to a second geographical location including the first and second storage systems. A command is transmitted to cause the copying of updates to the volumes in the first storage system to corresponding volumes in the second storage system indicated in the mirror policy. Upon an occurrence of an event, the causing the suspension of the copying of updates to the volumes in the first storage system indicated in the mirroring policy to the volumes in the second storage system. During the suspension of the copying of volumes between the first and second storage systems, causing the copying of updates to the volumes in the second storage system indicated in the mirroring policy to the volumes in the third storage system indicated in the mirroring policy. | 01-15-2009 |
20090055689 | SYSTEMS, METHODS, AND COMPUTER PRODUCTS FOR COORDINATED DISASTER RECOVERY - Systems, methods and computer products for coordinated disaster recovery of at least one computing cluster site are disclosed. According to exemplary embodiments, a disaster recovery system may include a computer processor and a disaster recovery process residing on the computer processor. The disaster recovery process may have instructions to monitor at least one computing cluster site, communicate monitoring events regarding the at least one computing cluster site with a second computing cluster site, generate alerts responsive to the monitoring events on the second computing cluster site regarding potential disasters, and coordinate recovery of the at least one computing cluster site onto the second computing cluster site in the event of a disaster. | 02-26-2009 |
20100169720 | SYSTEM AND METHOD FOR DETERMINING RECOVERY TIME FOR INTERDEPENDENT RESOURCES IN HETEROGENEOUS COMPUTING ENVIRONMENT - A system and associated method for determining a recovery time for a resource in a heterogeneous computing environment comprising interdependent resources. A graph for the resource representing all sequence dependencies and all group relations are created. The recovery time may be a cumulative startup time or a cumulative shutdown time of the resource considering interdependencies of the resource to other resources. The recovery time for all support resources having sequence dependencies with the resource is calculated and each node representing the support resources are removed from the graph. Then the recovery time for all member resources left in the graph that have group relations with the resource is calculated per a group type of the resource. The recovery time for the resource is a sum of the recovery time of all support resources, the recovery time of all member resources, and a unit recovery time of the resource. | 07-01-2010 |
20110239040 | Parallel Multiplex Storage Systems - A method for controlling a system includes receiving an indication that an operation has failed in a secondary storage device, suspending data operations sent to the secondary data storage device from a primary storage device, determining a failure policy set by a user, and initiating a first policy responsive to determining that the first policy is active, the first policy including sending a status query to the secondary storage device, determining whether a response has been received from the secondary storage device, determining whether the response indicates a failure of the secondary storage device responsive to determining that the response has been received from the secondary storage device, and continuing processing tasks on the server and data operations on the primary storage device responsive to determining that the response indicates a failure of the secondary storage device. | 09-29-2011 |
20120259968 | CONTINUOUS AVAILABILITY BETWEEN SITES AT UNLIMITED DISTANCES - A continuous availability system including a controller module executing on a computer processor, the system is configured to receive a unit of work and to select a primary site from a plurality of sites to process the unit of work. Once a site is selected the system is further configured to select one of one or more processing systems from the primary site to process the unit of work. The system is additionally configured to replicate the unit of work to at least one other site once the unit of work is completed at the primary site. The system is configured to operate even when the primary site is separated from each of the plurality of sites by a distance greater than a metropolitan area network and the operations occur within a customer acceptability window. | 10-11-2012 |
20130007503 | CONTINUOUS WORKLOAD AVAILABILITY BETWEEN SITES AT UNLIMITED DISTANCES - Continuous workload availability between sites at unlimited distances, which includes receiving a unit of work data. Once the unit of work data has been received the workload that the unit of work data is directed to is determined, and a primary site of a plurality of sites to process the unit of work is chosen. If the processing of the unit of work data is successful, then one of one or more processing systems of the primary site are selected to process the unit of work data, and the unit of work data is replicated to at least one other site. The primary site is separated from each of the plurality of sites by a distance greater than a metropolitan area network (MAN) and operations occur within a customer acceptability window. | 01-03-2013 |
20130318221 | VARIABLE CONFIGURATIONS FOR WORKLOAD DISTRIBUTION ACROSS MULTIPLE SITES - Embodiments include a method, system, and computer program product for maintaining continuous availability. An embodiment of the present invention includes receiving a unit of work data. The unit of work data is distributed among the plurality of workloads using either an active/standby configuration, an active/query configuration, an active/partitioned configuration, or an active/active configuration. A primary workload is selected from a plurality of workloads to process the unit of work data based on a workload distribution rule. It is determined if the primary workload is capable of processing the unit of work data based on user configurable settings. If the primary site is capable of processing the unit of work data then the unit of work data is transmitted to the primary workload. Otherwise the unit of work data is transmitted to a secondary workload. The unit of work data is replicated between the primary workload and the secondary workload. | 11-28-2013 |
20140108662 | VARIABLE CONFIGURATIONS FOR WORKLOAD DISTRIBUTION ACROSS MULTIPLE SITES - Embodiments include a method, system, and computer program product for maintaining continuous availability. An embodiment of the present invention includes receiving a unit of work data. The unit of work data is distributed among the plurality of workloads using either an active/standby configuration, an active/query configuration, an active/partitioned configuration, or an active/active configuration. A primary workload is selected from a plurality of workloads to process the unit of work data based on a workload distribution rule. It is determined if the primary workload is capable of processing the unit of work data based on user configurable settings. If the primary site is capable of processing the unit of work data then the unit of work data is transmitted to the primary workload. Otherwise the unit of work data is transmitted to a secondary workload. The unit of work data is replicated between the primary workload and the secondary workload. | 04-17-2014 |
20140173341 | ENHANCED RECOVERY OF HIGHLY AVAILABLE COMPUTING SYSTEMS - Exemplary embodiments disclose a method and system for detecting a failure and resuming processing in a computing system encompassing at least two sites, a primary site and a secondary site. In a module, an exemplary embodiment generates a record of a logically consistent state and data of system components of the primary site periodically and transfers the record of a logically consistent state and data of system components of the primary site to the secondary site. In another module, an exemplary embodiment detects a failure in the primary site, halts the generation of the record of a logically consistent state and data of system components of the primary site periodically with a data freeze function, and resumes a processing of the primary site on the secondary site with secondary site components updated with a most recent logically consistent state and data of system components of the primary site. | 06-19-2014 |
20140258659 | PROTECTION OF FORMER PRIMARY VOLUMES IN A SYNCHRONOUS REPLICATION RELATIONSHIP - An aspect includes protecting a former primary volume in a synchronous replication relationship. A swap between a primary volume at a first site and a secondary volume at a second site is initiated such that the secondary volume becomes a new primary volume and the primary volume becomes the former primary volume. A fenced state is set as active for the former primary volume. The former primary volume is configured as a fenced volume based on the fenced state being active. Read and write access to the fenced volume is blocked while the fenced state is active. | 09-11-2014 |
20140279897 | USING AVERAGE REPLICATION LATENCY TO INFLUENCE ROUTING QUERY TRANSACTIONS - A data processing system and method of operation are disclosed. The data processing system includes a first site for processing data; a second site for processing data; and a transaction replay program configured to send a copy of data from the first site to the second site. A processor defines a maximum replication latency threshold and a reset threshold for the system, estimates a replication latency of a workload the system, switches the system to a first replication latency state when the estimated replication latency rises above the maximum replication latency and switches the system out of the first replication latency state to a second replication latency state when the estimated replication latency falls below the reset threshold. | 09-18-2014 |
20140282596 | ACHIEVING CONTINUOUS AVAILABILITY FOR PLANNED WORKLOAD AND SITE SWITCHES WITH NO DATA LOSS - Embodiments of the disclosure are directed to methods, systems and computer program products for performing a planned workload switch. A method includes receiving a request to switch a site of an active workload and stopping one or more long running processes from submitting a new request to the active workload. The method also includes preventing a new network connection from accessing the active workload and processing one or more transactions in a queue of the active workload for a time period. Based on a determination that the queue of the active workload is not empty after the time period, the method includes aborting all remaining transactions in the queue of the active workload. The method further includes replicating all remaining committed units of work to a standby workload associated with the active workload. | 09-18-2014 |
20140317442 | COMMUNICATION OF CONDITIONS AT A PRIMARY STORAGE CONTROLLER TO A HOST - A primary storage controller is maintained in a copy relationship with a secondary storage controller, wherein the primary and secondary storage controllers are coupled to a host that is configurable to use the secondary storage controller instead of the primary storage controller. The primary storage controller determines occurrence of at least one condition in the primary storage controller, wherein the at least one condition occurs prior to a failure of the host to perform an Input/Output (I/O) operation with respect to at least one storage volume of the primary storage controller. The primary storage controller communicates the occurrence of the at least one condition to the host, wherein in response to the communicating the host is configured to determine whether to use the secondary storage controller instead of the primary storage controller based on the occurrence of the at least one condition. | 10-23-2014 |
20150058281 | MANAGEMENT AND SYNCHRONIZATION OF BATCH WORKLOADS WITH ACTIVE/ACTIVE SITES OLTP WORKLOADS - A computer system for managing a plurality of workloads executing on both a primary system and on a secondary system, and synchronizing both a plurality of software data and hardware data stored on the primary system with the secondary system is provided. The computer system may include receiving a region switch request and stopping the execution of the plurality of workloads on the primary system; suspending the replication of the plurality of software and hardware data stored on the primary system with the plurality of software and hardware data stored on the secondary system; and switching the replication of the plurality of software data and the plurality of hardware data that occurs from the primary system to the secondary system to occur from the secondary system to the primary system. The computer system may include activating the execution of and synchronizing the plurality of workloads on the secondary system. | 02-26-2015 |
20150058864 | MANAGEMENT AND SYNCHRONIZATION OF BATCH WORKLOADS WITH ACTIVE/ACTIVE SITES OLTP WORKLOADS - A method for managing a plurality of workloads executing on both a primary system and on a secondary system, and synchronizing both a plurality of software data and a plurality of hardware data stored on the primary system with the secondary system is provided. The method may include receiving a region switch request and stopping the execution of the plurality of workloads on the primary system; suspending the replication of the plurality of software and hardware data stored on the primary system with the plurality of software and hardware data stored on the secondary system; and switching the replication of the plurality of software data and the plurality of hardware data that occurs from the primary system to the secondary system to occur from the secondary system to the primary system. The method may further include activating the execution of and synchronizing the plurality of workloads on the secondary system. | 02-26-2015 |