A network device includes a database that includes a number of tables, an observer, and a query service (QS) manager. The observer monitors an element of a first table of the number of tables and provide a value of the element to a query instance of a number of query instances. The QS manager generate the number of query instances. The query instance of the number of query instances executes a compiled query in response to receiving the value.

Technologies for managing immutable data include a data storage device having a data storage controller and memory for storing data. The data storage controller may receive requests from a host of the data storage device to mark data stored in the memory as immutable. In response to the request, the data storage controller is configured to set an immutable flag associated with the identified data to mark the identified data as immutable. The immutable flag, when set, provides an indication that the associated data is unmodifiable. In some embodiments, the data storage device may also compact and/or move the immutable data to an immutable memory region of the memory. Technologies to mark the immutable data as mutable, write to the immutable data, and delete or trim the immutable data are also disclosed.

Described are techniques for processing a write operation that writes first data to a target location of a logical address range of a logical device. It is determined whether the target location is mapped to physical storage. Responsive to determining that the target location is not mapped to physical storage, performing first processing to service the write operation. The first processing includes sending the write operation along with a hint to a caching layer where the hint indicates to store zeroes to locations that do not include user data. The caching layer forms a data portion denoting data stored at a logical address subrange of the logical device. The logical address subrange includes the target location. The data portion includes the first data and zeroes stored at remaining locations of the logical address subrange not including user data. The data portion is stored in cache by the caching layer.

Data storage apparatus comprises detection circuitry configured to detect a match between a multi-bit reference memory address and a test address, the test address being a combination of a multi-bit base address and a multi-bit address offset, the detection circuitry comprising: a comparator configured to compare, as a first comparison, a first subset of bits of the reference memory address with a combination of the corresponding first subset of bits of the base address and the corresponding first subset of bits of the address offset; the comparator being configured to compare, as a second comparison, a second, different subset of bits of the reference memory address with the corresponding second subset of bits of the base address; a detector configured to detect the match between the reference memory address and the test address when both of the first comparison and the second comparison detect a respective match; and control circuitry configured to control operation of the data storage apparatus in dependence upon the reference memory address when a match is detected by the detector.

Embodiments may be generally direct to apparatuses, systems, method, and techniques to determine a configuration for a plurality of connectors, the configuration to associate a first interconnect protocol with a first subset of the plurality of connectors and a second interconnect protocol with a second subset of the plurality of connectors, the first interconnect protocol and the second interconnect protocol are different interconnect protocols and each comprising one of a serial link protocol, a coherent link protocol, and an accelerator link protocol, cause processing of data for communication via the first subset of the plurality of connectors in accordance with the first interconnect protocol, and cause processing of data for communication via the second subset of the plurality of connector in accordance with the second interconnect protocol.

A storage system includes a plurality of storage devices, including a first storage device and an information processor apparatus for managing the storage system. The first storage device is configured to select a second storage device coupled over a network with the information processor apparatus from among the plurality of storage devices, and assign a representative address such as an Internet Protocol (IP) address to be used for communication with the information processor apparatus to the selected second storage device. The second storage device is configured to receive a request addressed to the representative address from the information processor apparatus, and transfer the request to a third storage device among the plurality of storage devices to process the request. An assigned representative address may be canceled when a storage device fails and an internal IP address may be assigned. Storage devices may be selected based on load and the need for cable or hardwired connections may be reduced.

A storage system includes a plurality of storage devices in a storage chassis and configured to store objects, an Ethernet switch in the storage chassis, a Baseboard Management Controller (BMC) connected to the storage devices, and a memory connected to the BMC. The plurality of storage devices include a query storage device and a candidate storage device, and the storage devices are connected to each other via the Ethernet switch in the storage chassis. The memory or the query storage devices is configured to store metadata corresponding to the objects stored in the candidate storage device.

A data storage structure, comprising: a plurality of storage units, each comprising: a storage media; and a library executive configured to manage the storage media. The structure further comprises a buffer connected to a controller, the controller comprising: a host interface configured to receive the instruction from the host machine; an object aggregator configured to combine the plurality of data objects into a data segment; a persistent write buffer configured to store the data segment; a persistent map configured to identify a location of each of the plurality of objects in the data segment; an erasure coder configured to encode the data segment into an erasure code; a destager configured to transfer the data segment from the persistent write buffer to the storage media in a given storage unit; and a library controller configured to communicate with the library executive in the given storage unit.

Systems, devices, and methods for managing fragmentation in hardware-assisted compression of data in physical computer memory which may result in reduced internal fragmentation. An example computer-implemented method comprises: providing, by a memory management program to compression hardware, a compression command including an address in physical computer memory of data to be compressed and a list of at least two available buffers for storing compressed data; using, by the compression hardware, the address included in the compression command to retrieve uncompressed data; compressing the uncompressed data; and selecting, by the compression hardware, from the list of at least two available buffers, at least two buffers for storing compressed data based on an amount of space that would remain if the compressed data were stored in the at least two buffers, wherein each of the at least two selected buffers differs in size from at least one other of the selected buffers.

An information processing device that are capable of continuing access to an I/O device by operational computers even when a failure has occurred in a management computer is provided. A virtualization bridge (300) includes a monitoring unit (307) and a backup control unit (308). The virtualization bridge (300) provides operational computers (200) with virtual functions of an I/O device (400). The monitoring unit (307) detects failures in a management computer (100). The backup control unit (308) generates backup management information (341) on the basis of packets transmitted and received between the management computer (100) and the I/O device (400), and, when a failure in the management computer (100) is detected by the monitoring unit (307), controls the I/O device 400 on the basis of the backup management information (341) in place of the management computer (100).