摘要:
Some embodiments relate to storing objects on a fixed-content archive storage system. When a request to modify an object is received, a new object or portion of an object is created, rather than overwriting the previous version of the object.
摘要:
A data item is retrieved from a data store in a data processing system. The data processing system comprises an index, which at least partially indexes the data store, and also a partiality definition store. The partiality definition store indicates a part of the data store which is referenced by the partial index. A request is received for a data item from the data store and responsive to determining that the requested data item is not referenced by the partial index, the data store is searched by using the partiality definition store to avoid searching a part of the data store which is known to be indexed.
摘要:
Described are techniques for controlling access to objects. A template is selected. The template includes information specifying a role, one or more levels of expertise, and which objects and object information are accessible to said one or more levels of expertise. A first of the levels of expertise is selected. The template and the first level of expertise are associated with a user identifier. Access to objects and object information is restricted in accordance with the template when performing processing for the user identifier.
摘要:
A computer readable medium encoded with a computer program for handling transaction messages in asynchronous data replication in a database system is disclosed. The computer program provides a high speed parallel apply of transactional changes to a target node such that the parallel nature of the application of changes does not compromise the integrity of the data. The computer program detects, tracks, and handles dependencies between transaction messages to be applied to the target node. If a transaction message has a dependency on one or more preceding transaction messages whose applications have not yet completed, that transaction message is held until the application completes. In addition, the computer program requires significantly less overhead than conventional approaches.
摘要:
Described are techniques for performing data storage system management of a data storage system. An active element manager component is provided that performs data storage system management operations. User relevant information is received at said active element manager component from an external environment. The user relevant information includes information about an entity for purchase or license using said external environment which is relevant to a first user identifier. For an active element management session having said first user identifier, the user relevant information is displayed via a user interface. The user interface provides for display a first portion of said user relevant information. Upon selection of the first portion, the active element manager component connects to a target location in said external environment that is associated with the entity and provides context information to said external environment.
摘要:
Embodiments of the invention relate to controlling access to a content unit stored on an object addressable storage (OAS) system. In one embodiment, the content unit may have an object identifier that is used to identify it on the OAS system. A first portion of a content unit may be assigned a first set of access permissions and a second portion of the content unit may be assigned a second set of access permissions that is different from the first set of access permissions.
摘要:
A system, method and program product for processing irregularly occurring data events in real time. A system is provided for processing a stream of data events occurring over irregular time periods, including: a system for updating a running estimate each time a new data event is detected, wherein the running estimate is calculated based on a value associated with the new data event, an amount of time that elapsed since a previous data event was detected, and a previously calculated running estimate; and an analysis system that analyzes the running estimate after it is updated to identify a suspect data event value.
摘要:
Described are techniques for provisioning storage of a data storage system for use by an application. One or more application provision requirements associated with a provisioning request to provision storage for use by the application are received. The one or more application provision requirements are translated, in accordance with application best practices for the application included in a policy, to one or more generic storage resource requirements. The one or more generic storage resource requirements are translated, in accordance with data storage system best practices included in said policy, to one or more physical data storage requirements. The physical data storage requirements include identification of one or more physical storage devices in said data storage system used in allocating storage to service said provisioning request. Storage is allocated for use by said application in accordance with said physical data storage requirements.
摘要:
A system, method and program product for processing a stream of data events using scaled exponential smoothing for maintaining a histogram. A system is provided having: a set of histogram data that maintains a running value for each of a plurality of buckets; a bucket identification system for identifying a bucket b into which a new data event value belongs; an exponential smoothing system that applies a decay factor to the set of histogram data utilizing a first algorithm for the running value associated with bucket b, and a second algorithm for each remaining running value; and an analysis system for analyzing data event values in view of the histogram data.
摘要:
Methods and apparatus for performing a data migration in a clustered computer system. In one aspect, the availability of the data being migrated is maintained during the migration. In another aspect, a data set is migrated by a transfer utility in one of the hosts in the cluster, and in response to a failure of the host, the migration is resumed without restarting from the beginning point of the data set. In a further embodiment, the hosts in the cluster have agents associated therewith to manage the data migration, and prior to taking at least one action associated with the data migration, the agents coordinate to ensure that the hosts in the cluster are prepared to have the at least one action taken.