Scaleflux, Inc.

Jiangpeng Li

Yang Liu

Qi Wu

Yong Peng

Fei Sun

Tong Zhang

Qing Li

Dong Ping Zhang

Duy Nguyen

Mark Vernon

Wenzhong Wu

A system and method for providing compression and error correction coding (ECC) in a solid-state drive (SSD). A method is provided that includes: determining whether a data item is to be written to flash memory using a general-purpose mode or a zero-padding mode: in response to a determination that a data item is to be written into flash memory using the zero-padding mode: padding the data item with an all-zero tail to form an LBA data block of a predefined size; performing ECC coding on the LBA block to generate an ECC codeword; removing the all-zero tail from the ECC codeword to generate a shortened ECC codeword; and storing the shortened ECC codeword in flash memory.

Solid-state drive with multimode compression and error correction

A storage device that provides in-storage transparent compression and implements a process for processing write requests during an out-of-space state. The process includes: receiving a write request from a host involving a set of logical block addresses (LBAs); determining if each of the LBAs in the write request is an actively used LBAs; and in response to determining that each of the LBAs in the write request are actively used LBAs, allowing the write request to be served; and in response to determining that at least one of the LBAs in the write request is not an actively used LBAs, not allowing the write request to be served and returning an error to the host.

Techniques to enhance storage devices with built-in transparent compression for mitigating out-of-space issues

A system and method of implementing distributed metadata checkpointing in a storage device. A storage device is disclosed that includes storage device that employs distributed metadata checkpointing, including: flash memory; and a controller that collects metadata checkpoints and includes: a checkpoint partitioner that partitions a metadata checkpoint into a set of segments; and a segment loader that stores each segment of the set of segments into a spare region of a corresponding different flash memory pages during a write operation of data to flash memory.

Solid-state storage power failure protection using distributed metadata checkpointing

A storage infrastructure and method for efficiently handing block I/O requests. An infrastructure is described that includes flash memory and a controller that includes: a two dimensional (2D) linked list structure for temporarily storing BIO requests, wherein each BIO request specifies a set of LBAs and wherein the 2D linked list structure includes N vertical linked lists; a BIO request loader that applies a hash function to each LBA in a received BIO request to associate each LBA to one of N hash values, and loads the received BIO request into a horizontal linked list in the 2D linked list structure in which each LBA resides within a vertical linked list based on an associated hash values; and a linked list manager that determines which LBAs in the 2D linked list structure are eligible for processing and when a horizontal linked list can be removed.

Ensuring in-storage data atomicity and consistency at low cost

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San Jose, CA, United States of America

Jiangpeng Li