Alibaba Innovation Private Limited

This disclosure discloses a memory extension device, an operation method of the memory extension device, and a computer readable storage medium for executing the operation method. The method includes: converting local information received from a local host into local transaction layer information according to a first sub-protocol of a coherent interconnection protocol; converting the local transaction layer information into converted local transaction layer information according to a second sub-protocol of the coherent interconnection protocol, the converted local transaction layer information conforming to the second sub-protocol; packaging the converted local transaction layer information into a plurality of local data packets; and transmitting the plurality of local data packets to a remote memory extension device.

A physical host includes a memory, a first buffer, a second buffer, a third buffer and a processor. The first buffer stores a log regarding dirty pages. The second buffer stores a dirty bitmap, where the dirty bitmap is written into the second buffer according to the log read from the first buffer. The third buffer stores the dirty bitmap. The processor obtains the current memory address to be migrated and a destination memory address, and marks a page table corresponding to the memory address to be migrated as dirty pages and writes the log marked as the dirty pages into the first buffer when the memory address to be migrated is written. The processor includes a memory copy engine for reading the dirty bitmap from the third buffer, and copying the content corresponding to the dirty pages to the destination memory according to the dirty bitmap.

A key-value store is provided, implementing multiple-tiered sorted data structures in memory and storage, including concurrent write buffers in memory, and page-level consolidation of updates on storage, where pages are trivially translated in physical-to-virtual address mapping. The key-value store is built on an indexed sorted data structure on storage, occupying much less storage space and incurring much less disk activity in consolidating updates than a conventional log-structured merge tree organized into files. Concurrent write buffers operate concurrently and independently so that data is committed from memory to storage in an efficient manner, while maintaining chronological sequence of delta pages. Trivial mapping allows mappings of a number of physical pages to be omitted, enabling page mapping tables to occupy less storage space, and simplifying processing workload of read operation retrievals from storage.

The embodiments of the present invention provide a data communication method, a memory pooling switch device, a cloud computing system, and a storage medium. The data communication method comprises: converting verification preprocessed memory data from a receiver's communication protocol format to a sender's communication protocol format, wherein the receiver's communication protocol format and the sender's communication protocol format are used for asymmetric communication protocols on a communication bus between a server and a memory pooling switch device; performing verification processing on the verification preprocessed memory data to obtain a verification result; transmitting the verification result to the server via the communication bus in the sender's communication protocol format.

The present invention provides a switch, which is equipped with multiple connection interfaces, for connecting to multiple external processors respectively, enabling mutual access to the respective memories of these processors through the switch. The switch is configured to: through a memory request service component corresponding to a first processor, set within the switch, receive a first memory request sent by the first processor; convert the first memory request into a second memory request aimed at accessing the memory of a second processor and send this second memory request to a memory response service component corresponding to the second processor within the switch; through the memory response service component, convert the second memory request into a third memory request for accessing local memory and send this third memory request to the second processor to access the memory resources corresponding to the second processor.

A memory pooling configuration system includes: a plurality of servers, an expansion switch in communication with the plurality of servers, and a memory configuration device. A target server acquires first memory pooling configuration information, which instructs the target server to send a second memory access request to the expansion switch when a virtual address indicated by a first memory access request does not correspond to a physical address space of the target server. The expansion switch acquires third memory pooling configuration information, which instructs the expansion switch to forward the second memory access request to an associated server based on the second memory access request. The associated server acquires second memory pooling configuration information, which instructs the associated server to return the memory access result of the second memory access request to the expansion switch, which forwards the memory access result to the target server.

This disclosure discloses a memory extension device, an operation method of the memory extension device, and a computer readable storage medium for executing the operation method. The method includes: converting local information received from a local host into local transaction layer information according to a first sub-protocol of a coherent interconnection protocol; converting the local transaction layer information into converted local transaction layer information according to a second sub-protocol of the coherent interconnection protocol, the converted local transaction layer information conforming to the second sub-protocol; packaging the converted local transaction layer information into a plurality of local data packets; and transmitting the plurality of local data packets to a remote memory extension device.

The present disclosure relates to a computer system, a method for a computer system, and a computer-readable storage medium for executing the method for a computer system. The method for a computer system includes: using a first central processing unit (CPU) in a first host of the plurality of hosts to send memory request information according to a storage space required for executing a task; using a first cache coherence device in the first host and the switch to forward the memory request information to a second host of the plurality of hosts, so as to request the second host to allocate partial space in a memory to the first CPU for use, wherein the second host includes a second cache coherence device; in response to allocating the partial space in the memory of the second host, using the second cache coherence device and the switch to provide a physical address of the partial space to the first cache coherence device for translation to generate a translated physical address; and accessing the partial space by the first CPU using the translated physical address.

The present disclosure provides a physical host including a memory, a first buffer, a second buffer, a third buffer and a processor. The first buffer stores a log regarding a plurality of dirty pages. The second buffer stores a dirty bitmap, where the dirty bitmap is written into the second buffer according to the log read from the first buffer. The third buffer stores the dirty bitmap. The processor obtains the current memory address to be migrated and a destination memory address, and marks a page table corresponding to the memory address to be migrated as a plurality of dirty pages and writes the log marked as the plurality of dirty pages into the first buffer when the memory address to be migrated is written. The processor includes a memory copy engine for reading the dirty bitmap from the third buffer, and copying the content corresponding to the plurality of dirty pages to the destination memory according to the dirty bitmap.