Abstract: In an example, Virtual Machine (VM) attributes of a first VM are received. First VM data corresponding to the first VM is to be moved from a first cluster of nodes in which the first VM data is stored. Further, a movement value of the first VM is determined based on a movement model and the VM attributes of the first VM. The movement model indicates a dependence of movement value of a VM on VM attributes of the VM. The movement value of the first VM is indicative of a rank order for movement of the first VM data among a plurality of sets of VM data to be moved, where each set of VM data corresponds to a VM.

Abstract: Some examples described herein relate to identifying a backup cluster for data backup. In an example, a primary source node may provide hash values of data on the primary source node to a plurality of cluster management systems, wherein each cluster management system manages a respective cluster. In response, the primary source node may receive mapping information of nodes in the respective cluster from corresponding cluster management system. The mapping information of a given node may indicate an extent of a match between the hash values of data on the source node and hash values of data on the given node. Based on mapping information of nodes, the primary source node may identify a backup cluster for backing up data on the primary source node.

Abstract: In an example, reconstruction values may be assigned to a Virtual Machine (VM) based on an attribute of a VM. The attribute of the VM may be compared with a corresponding attribute of each reference VM of a set of reference VMs. Each reference VM may have a reference reconstruction value. Using the reconstruction value, the VM may be rank ordered amongst a plurality of VMs for reconstruction of its data.

Abstract: In an example, Virtual Machine (VM) attributes of a first VM are received. First VM data corresponding to the first VM is to be moved from a first cluster of nodes in which the first VM data is stored. Further, a movement value of the first VM is determined based on a movement model and the VM attributes of the first VM. The movement model indicates a dependence of movement value of a VM on VM attributes of the VM. The movement value of the first VM is indicative of a rank order for movement of the first VM data among a plurality of sets of VM data to be moved, where each set of VM data corresponds to a VM.

Abstract: Example implementations relate to clusters of nodes. In an example, a method includes computing a score for a first node in a distributed storage system comprising a plurality of nodes. The score is a function of at least one of: a location of the first node, a health status of the first node, and a resource utilization of the first node. A rank of the first node among the plurality of nodes is then determined based on the score and on a plurality of scores associated with the plurality of nodes. An instruction is sent to the first node to instantiate a manager process for managing the distributed storage system on the first node when the rank of the first node is at least equal to a predefined rank.

Abstract: In an example, reconstruction values may be assigned to a Virtual Machine (VM) based on an attribute of a VM. The attribute of the VM may be compared with a corresponding attribute of each reference VM of a set of reference VMs. Each reference VM may have a reference reconstruction value. Using the reconstruction value, the VM may be rank ordered amongst a plurality of VMs for reconstruction of its data.

Abstract: Example implementations relate to clusters of nodes. In an example, a method includes computing a score for a first node in a distributed storage system comprising a plurality of nodes. The score is a function of at least one of: a location of the first node, a health status of the first node, and a resource utilization of the first node. A rank of the first node among the plurality of nodes is then determined based on the score and on a plurality of scores associated with the plurality of nodes. An instruction is sent to the first node to instantiate a manager process for managing the distributed storage system on the first node when the rank of the first node is at least equal to a predefined rank.

Abstract: An example computing system for sequencing host I/O requests and I/O snapshots is disclosed. The example disclosed herein comprises a processing circuitry coupled to a storage unit, a non-transitory storage medium, a policy repository, and a client SLA file, wherein the storage system comprises a plurality of LUNs.

Abstract: Some examples relate to prefetching data in a distributed storage system. In an example, a first storage node may receive I/O requests sent by a host system, for sequential data of a storage volume distributed across a plurality of storage nodes. The first storage node may determine whether the host system is aware or unaware of layout information of the storage volume. If the host system is unware, the first storage node may prefetch the sequential data of the storage volume from other nodes of the plurality of storage nodes. If the host system is aware, the first storage node may indicate to a second storage node that the I/O requests by the host system are for the sequential data of the storage volume.

Abstract: Techniques for data backup and recovery are described. In one implementation, at least one storage device storing original data which has failed is determined. Once the failed storage device is determined, backup related information corresponding to the failed at least one storage device is determined. Based on the backup related information at least one backup of the original data from a storage unit is identified. The backup as identified is eventually used for recovering data corresponding to the original data.

Abstract: Techniques for data backup and recovery are described. In one implementation, at least one storage device storing original data which has failed is determined. Once the failed storage device is determined, backup related information corresponding to the failed at least one storage device is determined. Based on the backup related information at least one backup of the original data from a storage unit is identified. The backup as identified is eventually used for recovering data corresponding to the original data.