Direct memory access data path for RAID storage is disclosed, including: receiving, at a Redundant Array of Independent Disks (RAID) controller, a request to write data to be distributed among a plurality of storage devices; computing parity information based at least in part on the data associated with the request; causing the parity information to be stored on a first subset of the plurality of storage devices; and causing the data associated with the request to be stored on a second subset of the plurality of storage devices, wherein the plurality of storage devices is configured to obtain the data associated with the request directly from a memory that is remote to the RAID controller, and wherein the data associated with the request does not pass through the RAID controller.

A computerized system for efficient interaction between a host, the host having a first operating system, and a second operating system, the system comprising a subsystem on the second operating system which extracts data, directly from a buffer which is local to the host, wherein the system is operative for mapping memory from one bus associated with the first operating system to a different bus, associated with the second operating system and from which different bus the memory is accessed, thereby to emulate a connection between the first and second operating systems by cross-bus memory mapping.

A system and method for differentiated storage services with a Ethernet SSD includes receiving, at an Ethernet SSD (eSSD), an input/output (I/O) service request from a remote host via a multiprotocol label switching (MPLS) network. The I/O service request includes at least one parameter that may be used to match the I/O service request to a label switched path (LSP) based on the parameter(s). A storage traffic stream may then be opened between the eSSD and the remote host over the MPLS network according to the LSP.

Systems, methods, and apparatuses to support encrypted remote direct memory access for live migration of a virtual machine are described. In one embodiment, a first computer system includes an encryption circuit in a hardware processor of the first computer system to encrypt data, a memory controller circuit, of the first computer system, comprising a port to couple to a network interface controller circuit, a direct memory access engine circuit of the first computer system to access a memory in the first computer system, and the hardware processor to, for a request to perform a live migration of a virtual machine from the first computer system to a second computer system via the network interface controller circuit: encrypt code and data of the virtual machine from the memory with an encryption key by the encryption circuit of the hardware processor, store the encrypted code and data of the virtual machine within a migration buffer of the memory of the first computer system by the direct memory access engine circuit, and cause the network interface controller circuit to send the encrypted code and data of the virtual machine from the migration buffer to the second computer system via the network interface controller circuit without the network interface controller circuit performing an additional encryption.

The system allocates, in a distributed system comprising a plurality of nodes, a plurality of portions of memory which comprise shared remote memory content. The system registers the allocated portions with an operating system to be accessed via RDMA. The system accesses, by a first node, the allocated portions to obtain a local copy. The system performs an atomic operation on one or more bits of the shared remote memory content via libfabric atomic application programming interface calls, by one or more of: updating the one or more bits based on a new value and an offset; retrieving, from the shared remote memory content based on the offset, a current value of the one or more bits prior to the updating; and performing an action on the shared remote memory content based on a comparison of the retrieved current value with an expected value in the local copy.

Systems and methods are described for a cross-site high availability distributed storage system. According to one embodiment, a computer implemented method includes providing a remote direct memory access (RDMA) request for a RDMA stream, and generating, with an interconnect (IC) layer of the first storage node, multiple IC channels and associated IC requests for the RDMA request. The method further includes mapping an IC channel to a group of multiple transport layer sessions to split data traffic of the IC channel into multiple packets for the group of multiple transport layer sessions using an IC transport layer of the first storage node and assigning, with the IC transport layer, a unique transaction identification (ID) to each IC request and assigning a different data offset to each packet of a transport layer session.

A system for providing memory access is disclosed. In some embodiments, the system is configured to receive at a source server fabric adapter (SFA), from a server, a memory access request comprising a virtual memory address; using associative mapping, determining whether the virtual address corresponds to a source-local memory associated with the source SFA or to a remote memory. If the virtual address corresponds to the source-local memory, the virtual memory address is translated, at the source SFA, into a physical memory address of the source-local memory. If the virtual address corresponds to the remote memory, a request message is synthesized, and the synthesized request message is transmitted to the destination SFA using a network protocol.

Techniques for implementing user-space remote memory paging are provided. In one set of embodiments, these techniques include a user-space remote memory paging (RMP) runtime that can: (1) pre-allocate one or more regions of remote memory for use by an application; (2) at a time of receiving/intercepting a memory allocation function call invoked by the application, map the virtual memory address range of the allocated local memory to a portion of the pre-allocated remote memory; (3) at a time of detecting a page fault directed to a page that is mapped to remote memory, retrieve the page via Remote Direct Memory Access (RDMA) from its remote memory location and store the retrieved page in a local main memory cache; and (4) on a periodic basis, identify pages in the local main memory cache that are candidates for eviction and write out the identified pages via RDMA to their mapped remote memory locations if they have been modified.

A computer system that includes at least one host device comprising at least one processor. The at least one processor is configured to implement, in a host operating system (OS) space, a teamed network interface card (NIC) software program that provides a unified interface to host OS space upper layer protocols including at least a remote direct memory access (RDMA) protocol and an Ethernet protocol. The teamed NIC software program provides multiplexing for at least two data pathways. The at least two data pathways include an RDMA data pathway that transmits communications to and from an RDMA interface of a physical NIC, and an Ethernet data pathway that transmits communications to and from an Ethernet interface of the physical NIC through a virtual switch that is implemented in a host user space and a virtual NIC that is implemented in the host OS space.

The present disclosure relates to systems, methods, and computer-readable media for data from a first multi-dimensional memory block to a second multi-dimensional memory block. For example, systems described herein facilitate transferring data between memory blocks having different shapes from one another. The systems described herein facilitate transferring data between different shaped memory blocks by identifying shape properties and other characteristics of the data and generating a plurality of network packets having control data based on the identified shape properties and other characteristics. This data included within the network packets enables memory controllers to determine memory addresses on a destination memory block to write data from the network packets. Features described herein facilitate efficient transfer of data without generating a linearized copy that relies on constant availability of significant memory resources.