Abstract: The disclosure provides an approach for the dynamic configuration of virtualized objects. A virtual object may be associated with a desired state defining a first plurality of resources for allocating to the virtual object. The first plurality of resources correspond to one or more resource types. Techniques include determining that each of a plurality of hosts does not have sufficient available resources to allocate the first plurality of resources to the virtual object according to the desired state. Techniques include selecting, a first host of the plurality of hosts to run the virtual object. Techniques include allocating a second plurality of resources to the virtual object from the first host, wherein the second plurality of resources is less than the first plurality of resources, and running the virtual object in the first host.

Abstract: Disclosed are various embodiments for optimized memory tiering. An ideal tier size for a first memory and an ideal tier size for a second memory can be determined for a process. Then, a host computing device can be identified that can accommodate the ideal tier size for the first memory and the second memory. Subsequently, the process can be assigned to the host computing device.

Abstract: Disclosed are various embodiments for optimized memory tiering. A first page can be allocated in a first memory for a process, the first memory being associated with a first memory tier. Accesses of the first page by the process during execution of the process can be monitored. Then, accesses of the first page by the process during execution of the process can be compared to an allocation policy to make a first determination to move the contents of the first page from the first memory to a second memory associated with a second memory tier. Next, the contents of the first page can be copied from the first memory to a second page in the second memory in response to the first determination.

Abstract: Disclosed are various embodiments for optimizing the migration of processes or virtual machines in cluster memory systems. To begin, a first computing device can identify a set of pages allocated to a process or virtual machine hosted by the first computing device. Then, the first computing device can identify a subset of the allocated pages that have been accessed with a least a predefined frequency. Next, the first computing device can copy the subset of the allocated pages to a second computing device. Subsequently, the first computing device can copy a page mapping table to the second computing device, the page mapping table specifying which pages in the set of pages allocated to the process or virtual machine are stored by a memory host. Finally, the first computing device can copy remaining ones of the allocated pages to the second computing device.

Abstract: Disclosed are various embodiments for optimizing the migration of pages of memory servers in cluster memory systems. To begin, a computing device can mark in a page table of the computing device that a page stored on a first memory host is not present. Then, the computing device can flush a translation lookaside buffer of the computing device. Next, the computing device can copy the page from the first memory host to a second memory host. Moving on, the computing device can update a page mapping table to reflect that the page is stored in the second memory host. Then, the computing device can mark in the page table of the computing device that the page stored in the second memory host is present. Subsequently, the computing device can discard the page stored on the first memory host.

Abstract: The disclosure provides an approach for the dynamic configuration of virtualized objects. A virtual object may be associated with a desired state defining a first plurality of resources for allocating to the virtual object. The first plurality of resources correspond to one or more resource types. Techniques include determining that each of a plurality of hosts does not have sufficient available resources to allocate the first plurality of resources to the virtual object according to the desired state. Techniques include selecting, a first host of the plurality of hosts to run the virtual object. Techniques include allocating a second plurality of resources to the virtual object from the first host, wherein the second plurality of resources is less than the first plurality of resources, and running the virtual object in the first host.

Abstract: Users of a client computer having non-conventional input devices interact with a host computing platform with the same user experience as if he or she was operating the client computer natively. This is achieved by having the non-conventional input devices of the client device appear local to the applications that are running on the host platform, even though the host computing platform may not be equipped with drivers for the non-conventional input devices.

Abstract: Creating and using highly available transaction logs in a distributed storage system is described, where the storage controller functions of the distributed storage system are separated from that of distributed storage system storage media. In an exemplary embodiment, a storage controller server receives a transaction entry at a first storage pool of the distributed storage system. The storage controller server further looks up a transaction log to store the transaction entry, where the transaction log is associated with a second storage pool. The storage controller server routes the transaction entry to the second storage pool, wherein the second storage pool stores the transaction entry.

Abstract: A distributed storage system called StorFS that performs distributed data deduplication is described. In an exemplary embodiment, a storage controller server determines if there is duplicative data in a distributed storage system. In this embodiment, the storage controller server determines if an entity is duplicated in the distributed storage system in line with an incoming input/output operation. The storage controller server determines if the entity is duplicated in the distributed storage system by receiving the entity and looking up the entity in a data deduplication table. If the entity exists in the data deduplication table, the storage controller server updates the metadata for the entity to point to the duplicate entity.

Abstract: A distributed storage system that dispatches an input/output request is described. In an exemplary embodiment, a storage controller client receives the input/output request, wherein the distributed storage system includes the storage controller client, a plurality of storage controller servers, a plurality of virtual nodes distributed among a plurality of physical nodes, and each of the plurality of physical nodes is hosted on one of the plurality of storage controller servers. The storage controller client further computes a target virtual node for the input/output request, where the target virtual node is one of the plurality of virtual nodes. Using the computed target virtual node, the storage controller client determines a target physical node that corresponds to the target virtual node, where the target physical node is one of the plurality of physical nodes.

Abstract: Users of a client computer having non-conventional input devices interact with a host computing platform with the same user experience as if he or she was operating the client computer natively. This is achieved by having the non-conventional input devices of the client device appear local to the applications that are running on the host platform, even though the host computing platform may not be equipped with drivers for the non-conventional input devices.

Abstract: A distributed snapshot in a distributed storage system is described, where the storage controller functions of the distributed storage system are separated from that of distributed storage system storage media. In an exemplary embodiment, a storage controller server receives a request to create the snapshot in the distributed storage system, where the distributed storage system includes a plurality of virtual nodes and a plurality of physical nodes, and the source object includes a plurality of stripes. The storage controller server further determines a set of virtual nodes from the plurality of virtual nodes, where each of the set of virtual nodes owns one of the plurality of stripes of the source object. For each of the set of virtual nodes, the storage controller server sends a clone request to that virtual node, where the request is to create a snapshot for the stripe hosted by that virtual node.

Abstract: Users of a client computer having non-conventional input devices interact with a host computing platform with the same user experience as if he or she was operating the client computer natively. This is achieved by having the non-conventional input devices of the client device appear local to the applications that are running on the host platform, even though the host computing platform may not be equipped with drivers for the non-conventional input devices.

Abstract: A distributed multi-layer cache in a distributed storage system is described, where the storage controller functions of the distributed storage system are separated from that of distributed storage system storage media. In an exemplary embodiment, a storage controller server determines if an object is in a cache that stores a plurality of objects. In addition, the distributed storage system includes the cache and a distributed object layer for persistently storing the plurality of objects. The cache further includes a de-duplicated cache layer. The storage controller server accesses the object from the cache if the object is in the cache and accesses the object from the distributed object layer if the object is not in the cache.

Abstract: A distributed storage system that dispatches an input/output request is described. In an exemplary embodiment, a storage controller client receives the input/output request, wherein the distributed storage system includes the storage controller client, a plurality of storage controller servers, a plurality of virtual nodes distributed among a plurality of physical nodes, and each of the plurality of physical nodes is hosted on one of the plurality of storage controller servers. The storage controller client further computes a target virtual node for the input/output request, where the target virtual node is one of the plurality of virtual nodes. Using the computed target virtual node, the storage controller client determines a target physical node that corresponds to the target virtual node, where the target physical node is one of the plurality of physical nodes.

Abstract: A distributed garbage collection in a distributed storage system is described, where the storage controller functions of the distributed storage system are separated from that of distributed storage system storage media. In an exemplary embodiment, a storage controller server generates a live object map of live objects stored on the distributed storage system in a plurality of block segments distributed across a plurality of storage controller servers. The storage controller server further scans the plurality of block segments to generate segment summary statistics, where the segment summary statistics indicates the number of live objects stored in the plurality of block segments. In addition, the storage controller server compacts each of the plurality of block segments that have a low utilization based on the segment summary statistics. Furthermore, the live object map is a probabilistic data structure storing a list of valid objects.

Abstract: A distributed storage system that performs automated load balancing is described. In an exemplary embodiment, a storage controller server determines if there is duplicative data in a distributed storage system. In this embodiment, the storage controller server detects a load balancing event in the distributed storage system, where the distributed storage system includes a plurality of virtual nodes distributed across a plurality of physical nodes. In response to detecting the load balancing event, the storage controller server determines that a current virtual node is to move from a source physical node to a destination physical node. In addition, the current virtual node is one of the plurality of virtual nodes and the source and destination physical nodes are in the plurality of physical nodes. The storage controller server further moves the current virtual node from the source physical node to the destination physical node.

Abstract: One embodiment is a method of transferring data from a computer system to a Universal Serial Bus (USB) device after a computer system crash where interrupts are masked, the method comprising: (a) detecting the computer system crash; (b) transferring at least a portion of the data to a USB driver for the USB device; (c) the USB driver transferring the portion of the data to a USB controller driver for a USB controller for the USB device; (d) the USB controller driver causing the USB controller to transfer the portion of the data to the USB device; (e) polling the USB controller to determine whether the data transfer was completed; and (f) if the data transfer was completed, providing a notification to the computer system.

Abstract: One embodiment is a method of transferring data from a computer system to a Universal Serial Bus (USB) device after a computer system crash where interrupts are masked, the method comprising: (a) detecting the computer system crash; (b) transferring at least a portion of the data to a USB driver for the USB device; (c) the USB driver transferring the portion of the data to a USB controller driver for a USB controller for the USB device; (d) the USB controller driver causing the USB controller to transfer the portion of the data to the USB device; (e) polling the USB controller to determine whether the data transfer was completed; and (f) if the data transfer was completed, providing a notification to the computer system.

Abstract: A database system providing methodology for extended memory support is described. In one embodiment, for example, a method is described for extended memory support in a database system having a primary cache, the method comprises steps of: creating a secondary cache in memory available to the database system; mapping a virtual address range to at least a portion of the secondary cache; when the primary cache is full, replacing pages from the primary cache using the secondary cache; in response to a request for a particular page, searching for the particular page in the secondary cache if the particular page is not found in the primary cache; if the particular page is found in the secondary cache, determining a virtual address in the secondary cache where the particular page resides based on the mapping; and swapping the particular page found in the secondary cache with a page in the primary cache, so as to replace a page in the primary cache with the particular page from the secondary cache.