Preventing non-detectable data loss during site switchover
Granted: March 5, 2019
Patent Number:
10223223
Methods, systems, and computer program products for preventing non-detectable data loss during site switchover are disclosed. A computer-implemented method may include receiving a request to perform a switchover from a first node to a second node, determining whether to place a storage volume involved in the switchover in a suspended state, setting the storage volume in the suspended state based on determining that the storage volume is to be placed in the suspended state, and…
Mirror vote synchronization
Granted: February 26, 2019
Patent Number:
10216450
One or more techniques and/or systems are provided for mirror vote synchronization. For example, a first storage device is located at a first storage site, and a second storage device is located at a second storage site. The second storage device is configured according to a data mirroring configuration where data from the first storage device is mirrored to the second storage device. Mirror vote metadata is generated based upon an up-to-date state of the data mirroring configuration.…
Configuration replication across distributed storage systems
Granted: January 22, 2019
Patent Number:
10187256
A method includes receiving a change in a primary configuration of a primary storage node while the primary storage node is operational, wherein primary data stored in the primary storage node is to be backed up as backup data in a backup storage node. The method includes locating at least one identifier in the change that identifies the primary storage node. The method includes replacing the at least one identifier in the change that identifies the primary storage node with an…
Storage failure processing in a shared storage architecture
Granted: January 15, 2019
Patent Number:
10180871
The disclosed embodiments relate to systems and methods for coordinating management of a shared disk storage between nodes. Particularly, a messaging protocol may be used to communicate notifications regarding each node's perception of the shared storage's state. The nodes may use the messaging protocol to achieve consensus when recovering from a storage device failure. Some embodiments provide for recovery when localized failures, such as failures at an adapter on a node, occur.
Group management of authenticated entities
Granted: January 8, 2019
Patent Number:
10178079
Exemplary embodiments provide various techniques for managing groups of authenticated entities. In one exemplary computer-implemented method, an entity accesses a group roster that includes a first group identifier identifying a first group, a first group digital certificate associated with the first group, and a first entity identifier identifying the entity being a member of the first group. The entity also receives a request to update the group roster. Here, the request includes a…
Granular consistency group replication
Granted: January 8, 2019
Patent Number:
10176064
One or more techniques and/or computing devices are provided for granular replication for data protection. For example, a first storage controller may host a first volume. A consistency group, comprising a subset of files, logical unit numbers, and/or other data of the first volume, is defined through a consistency group configuration. A baseline transfer, using a baseline snapshot of the first volume, is used to create a replicated consistency group within a second volume hosted by a…
Techniques for importation of information to a storage system
Granted: January 8, 2019
Patent Number:
10175895
Various embodiments are generally directed an apparatus and method for receiving an event notification for a pair of cluster nodes having a first cluster node and a second cluster node, the event notification indicating an occurrence of a takeover event or a giveback event. Further, various embodiments may include suspending copying of information from a source logical unit to a target logical unit, transferring one or more processes from the first cluster node to the second cluster node…
Method and system for tracking information transferred between storage systems
Granted: December 25, 2018
Patent Number:
10162718
Methods and systems for tracking information that is transferred from a source to a destination storage system are provided. The source storage system maintains a first data structure for indicating that a storage block has been transferred. The destination storage system receives the storage block and updates a second data structure to indicate that the storage block has been received. The first data structure and the second data structure are compared to determine that the storage…
Granular sync/semi-sync architecture
Granted: November 20, 2018
Patent Number:
10135922
Data consistency and availability can be provided at the granularity of logical storage objects in storage solutions that use storage virtualization in clustered storage environments. To ensure consistency of data across different storage elements, synchronization is performed across the different storage elements. Changes to data are synchronized across storage elements in different clusters by propagating the changes from a primary logical storage object to a secondary logical storage…
Providing data integrity in a non-reliable storage behavior
Granted: October 30, 2018
Patent Number:
10114715
In one aspect of the disclosure, progress identifiers (e.g., a plurality of flags) and/or generation numbers are utilized to determine a “correct” non-volatile random access memory (NVRAM) replay source to use during a retried switchover or early switchback. Initially, a switchover sequence is initiated. The switchover sequence includes a replay of logged information to storage devices of an aggregate to ensure data consistency of the aggregate. Progress of the switchover sequence is…
System and method for implementing a block-based backup restart
Granted: October 16, 2018
Patent Number:
10102076
A system and method for block-based restarts are described. A data storage system interfaces with one or more nodes of a network file system on which a volume is provided in order to read data stored on the volume on a block-by-block basis. Backup data sets capable of recreating the data on the volume are generated from the data blocks read from the volume. The system can interface with a backup memory resource and write the backup data sets to the backup memory resource in a sequential…
I/O bandwidth reduction using storage-level common page information
Granted: July 10, 2018
Patent Number:
10021218
I/O bandwidth reduction using storage-level common page information is implemented by a storage server, in response to receiving a request from a client for a page stored at a first virtual address, determining that the first virtual address maps to a page that is a duplicate of a page stored at a second virtual address or that the first and second virtual addresses map to a deduplicated page within a storage system, and transmitting metadata to the client mapping the first virtual…
Non-disruptive baseline and resynchronization of a synchronous replication relationship
Granted: July 10, 2018
Patent Number:
10019502
One or more techniques and/or computing devices are provided for non-disruptively establishing a synchronous replication relationship between a primary volume and a secondary volume and/or for resynchronizing the primary volume and the secondary volume. For example, a baseline snapshot and one or more incremental snapshots of the primary volume are used to construct and incrementally update the secondary volume with data from the primary volume. A dirty region log is used to track…
Remote procedure call management
Granted: July 3, 2018
Patent Number:
10015283
One or more techniques and/or systems are provided for remote procedure call (RPC) management. For example, a thread pool, comprising one or more threads, may be maintained for parallel processing of RPC requests. RPC requests may be segmented into sets of RPC request task segments that may be queued into an RPC work queue for assignment to threads within the thread pool for execution. Counters may be used to monitor performance metrics associated with RPC execution throughput, queue…
Asynchronous semi-inline deduplication
Granted: June 19, 2018
Patent Number:
10001942
Techniques are provided for asynchronous semi-inline deduplication. A multi-tiered storage arrangement comprises a first storage tier, a second storage tier, etc. An in-memory change log of data recently written to the first storage tier is evaluate to identify a fingerprint of a data block recently written to the first storage tier. A donor data store, comprising fingerprints of data blocks already stored within the first storage tier, is queried using the fingerprint. If the…
Service processor traps for communicating storage controller failure
Granted: June 12, 2018
Patent Number:
9996436
One or more techniques and/or computing devices are provided for communicating storage controller failures utilizing service processor traps. A first storage controller, of a first storage cluster, has a disaster recovery relationship with a second storage controller of a second storage cluster. The first storage controller comprise a first service processor configured to monitor health of the first storage controller. Responsive to identifying a failure of the first storage controller,…
Calculating cutover time in a copy-free transition of storage objects
Granted: June 12, 2018
Patent Number:
9996275
A transition tool estimates a cutover time in a copy-free transition of storage objects. The transition tool determines how many storage objects of each type of storage object there are to transition from a source storage system to a destination storage system. The transition tool can measure an operation time for both the source storage system and the destination storage system. The transition tool can estimate an export duration using the source storage system operation time, the…
Virtual machine fault tolerance
Granted: June 5, 2018
Patent Number:
9990257
One or more techniques and/or systems are provided for hosting a virtual machine from a snapshot. In particular, a snapshot of a virtual machine hosted on a primary computing device may be created. The virtual machine may be hosted on a secondary computing device using the snapshot, for example, when a failure of the virtual machine on the primary computing device occurs. If a virtual machine type (format) of the snapshot is not supported by the secondary computing device, then the…
Dynamic mirroring
Granted: June 5, 2018
Patent Number:
9990262
One or more techniques and/or systems are provided for dynamic mirroring. A first storage node and the second storage node within a first storage cluster may locally mirror data between one another based upon a local failover partnership. The first storage node and a third storage node within a second storage cluster may remotely mirror data between one another based upon a primary disaster recovery partnership. If the third storage node fails, then the first storage node may remotely…
Cross-platform replication
Granted: June 5, 2018
Patent Number:
9990260
One or more techniques and/or computing devices are provided for cross-platform replication. For example, a replication relationship may be established between a first storage endpoint and a second storage endpoint, where at least one of the storage endpoints, such as the first storage endpoint, lacks or has incompatible functionality to perform and manage replication because the storage endpoints have different storage platforms that store data differently, use different control…
