Four lies of the hottest high-end storage

2022-08-18
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Four lies of high-end storage

the functions of high-end storage products that are Chinese but not real and have no practical application value are all lies

many car fans love F1, which represents the most advanced technology in the automotive industry. In the storage field, high-end products, like F1 racing cars, embody the most advanced technology of each manufacturer. The difference is that F1 racing is a relatively unknown real kung fu. Car fans only value the final result, while high-end storage products are not. Manufacturers often publicize many flashy things. When manufacturers emphasize to users these unrealistic functions that not only compete with domestic manufacturers, it is obviously a lie

lie 1: high end storage supports SATA. The application field of SATA disk is mass storage media that does not have particularly stringent requirements for performance and reliability. Its advantage is brought about by the serial mode. Compared with the parallel ATA disk, its performance, reliability, capacity and other aspects have been significantly improved. However, in the serial field, the positioning of SATA is obviously the lowest. It can not be compared with its brother SAS in all aspects, but it takes a certain lead because of its early appearance. Therefore, the industry generally believes that SATA is the most suitable for high-capacity, low-performance and low-cost applications. Such applications on high-end arrays will obviously cause a huge waste of resources. Recently, a manufacturer has hyped up its SATA support on high-end arrays, which shows that its high-end arrays cannot be effectively connected with mid-range products

lie 2: tiered storage is implemented inside high-end devices. The concept of tiered storage is to use different levels of storage systems to meet different storage needs, and a set of detailed policies are needed to manage the whole process. Putting policy management in high-end devices is obviously a bit overqualified. Of course, if users do not consider the cost and want to carry out all data management work on high-end devices (even low-end storage applications), it is not impossible. Many manufacturers are vigorously promoting ILM. Users' feedback is that ILM is too abstract, and it is far less practical than tiered storage at this stage. However, if the manufacturer's high, medium and low-end products cannot be integrated, any publicity of ILM and tiered storage is sensational

lie 3: raid6 is used in high-end arrays. Raid6 is an attractive technology, which allows two disks in an array to fail at the same time without losing data. Now the reliability of disks is very high, especially high-end fibre channel disks. Is it necessary to protect against the simultaneous failure of two disks? The answer is yes. The current disk capacity is already large. If a disk fails, the whole R cannot only focus on the problems of excess capacity, high inventory, high enterprise debt and high cost on the supply side. The disks in the aid group need data reconstruction. The larger the disk capacity, the longer the time it takes. If a disk failure occurs again within the time of data reconstruction, all data will be lost. Therefore, raid6 technology improves the reliability by more than 1000 times. However, it also has a big weakness, that is, the performance declines, so that it cannot meet the needs of high-end storage applications. Therefore, raid01 is still the most widely used by users at present. In July this year, the HDI plant that costron put into operation in the Shanghai base is also a large project in this 3billion Euro investment plan. Another manufacturer's high-end products claim to support raid6. They only mention high reliability and avoid performance problems in their publicity. Obviously, such a solution will not be widely used in the application field

lie 4: worm is implemented for high-end disks. There are many media that can realize worm, such as optical disc and tape, and some array manufacturers also realize worm on disk through more complex technologies. If the attribute of a disk is defined as worm, the data on it cannot be modified. Therefore, SATA disks are widely used to realize worm. As mentioned above, SATA disk itself is not suitable for high-end storage because the company has advanced equipment and professional experience. Similarly, worm disk in high-end system will also bring huge waste of resources. In extreme cases, data in all disks cannot be modified, so users can only read data. At present, there is no application that only needs to read data and requires the performance of high-end storage

the importance of high-end storage products to each manufacturer is self-evident. If a user's high-end products adopt the products of a manufacturer, then the subsequent middle-end and low-end products can easily adopt the same brand. Therefore, users must be extra cautious in choosing high-end products. The above phenomena need users' attention and carefully identify how much practical significance they have in their own environment. (end)

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