LSI: Better evolution than innovation

When a new technology or product emerges, everyone is eager to know whether or when the new product will completely replace the original product. In fact, many products have a "long tail effect". For example, when a disk backup occurs, people think that the tape will soon exit the market, but today the tape is still the main force of backup and archiving; after the emergence of SSD, many people think that it will eventually replace the mechanical hard disk, but at least from now on, it is not easy for SSD to replace the hard disk. There are many examples of this type. Philip G. Brace, executive vice president of the storage solution Department of LSI, believes that evolution is always better than innovation.

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Depends on the specific application

In the cloud computing era, more and more data needs to be stored and protected. "In fact, the power of evolution is more powerful ." Philip G. Brace further explained, "There are many disruptive companies with less historical burdens, so they will soon use the latest technology, such as flash memory. However, there are still a large number of traditional companies that will still use existing technologies, and the transition to new technologies will be slow only when new technologies become more mature. Taking flash memory and traditional hard drive as an example, many enterprises are now more inclined to adopt hybrid modes to share flash memory and hard drive, which can better protect users' original investment ."

A domestic storage vendor is optimistic that in 2015, the flash price will be closer to that of hard disks. In the next five years, people will be able to replace SAS hard disks with SSD. In this regard, according to PhilipG. Brace, we still need to look at the differences between specific applications. For example, some applications are very suitable for SSD. However, from the perspective of cost, the cost of flash memory is much higher than that of hard disks in a long period of time, measured by the storage cost per GB. "By 2020, there will be 40 ZB of data worldwide. It is impossible to store so much data only by flash memory. In the future, there will be two types of storage: Ultra-high-performance storage, which is based on flash memory, and massive storage devices, whose core is disk ." According to an analysis by PhilipG. Brace.

Philip G. Brace said that in the future, Flash technology will be available in full bloom, and the hard disk capacity will be larger. Even if there is a 10 TB hard disk, he will not be surprised. Hard Disks are mainly used to store cold data, while flash memory is mainly used for high performance and low latency scenarios. The ratio between flash memory and hard disk should be determined by specific applications. If it is a typical database application or Internet company, the proportion of Flash Memory Applications will be higher. However, in traditional industries such as pharmaceuticals, the ratio of flash memory is not too high. PhilipG. brace added: "users in traditional industries will not quickly use a large amount of flash memory, but Hierarchical Storage Solutions will become increasingly popular. For example, in a solution, both SSDS can meet Ultra-high performance requirements, there are also some other storage media that can meet low-cost and large-capacity requirements."

More robust flash storage

In the big data era, the core value of IT has gradually shifted from computing to storage. Improving the service quality and security of data has become an important topic. At the recent California flash memory summit, LSI released and demonstrated its latest SandForce Flash Controller Technology, LSISHIELD. LSISHIELD is an advanced error correction method, which improves the error correction capability of the nand flash memory and improves the durability and data integrity of the enterprise-level SSD.

LSISHIELD is a unique implementation of Low-Density Parity Check (Low-Density Parity Check) Code and digital signal processing (DSP). It can be used in the next-generation LSISandForce flash controller. "LSISHIELD technology perfectly integrates hard decision, soft decision, and DSP functions to provide an optimal Integrated Error Correction Code (ECC) solution for flash memory ." Expressed by PhilipG. Brace. LSISHIELD has many advantages over the existing low-density (low-density) algorithm: Adaptive encoding rate, dynamic balance of performance and reliability in the SSD lifecycle; Intelligent Processing of transient noise can reduce the overall low-density (low-density) decoding latency, improved ECC efficiency; multi-level ECC mode, timely application of higher level ECC, minimize latency, while maintaining the best flash performance.

The reduction of the flash memory size will lead to problems such as reduced reliability and reduced service life. LSISHIELD can solve the above problems by virtue of the advanced error correction function optimized specifically for SSD, providing users with a more stable flash storage solution.

This article from the "Guo Tao's storage world" blog, please be sure to keep this source http://gtstorageworld.blog.51cto.com/908359/1302827