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What is the security defense strategy of Guangzhou digital currency trading platform server?

First, the reason for choosing flash memory is not always obvious

Suppose you have a matrix diagram showing specific application cases, such as virtual desktop infrastructure (VDI), server virtualization, big data analysis, etc. It's really great to identify the ideal flash option on one axis and on the other. But this is almost impossible, because there are too many variables in the same application environment, and these variables will affect each other. For example, the specific location of the storage bottleneck usually determines where the flash technology is deployed (for example, on the host side or disk array side), but the storage bottleneck has little to do with the specific use case, but is closely related to the existing storage infrastructure. In any case, the judgment of the deployment location will affect the type of flash memory used (solid state storage drive or flash memory card, such as PCIe card) and deploy it as a cache or a separate storage layer. Conversely, the type of flash deployment determines the required capacity (tiered mode requires more capacity than flash mode), and costs and budgets limit capacity. However, the question of which flash technology to use is no longer as important as it was a few years ago. However, other factors, such as data risk, high availability, or rapid data growth, may affect all uses. Therefore, in addition to focusing on the use occasion and data parameter table, it is necessary to determine the better choice of flash memory storage based on the current actual environment.

Second, array based flash memory

If the controller of the storage array is always idle, it indicates that the storage system is waiting for disk drives (an inherent problem with storage media), so adding solid-state storage to the storage array is a useful solution. However, if the array design does not support flash memory, adding solid state storage may not be effective, because a drive bay full of solid state storage may turn the storage controller into a new bottleneck. Similarly, if the utilization rate of the controller is close to saturation, it is useless to put the solid-state storage disk into the storage system. If the network is not a problem, a better solution should be to invest in another storage system that supports solid-state storage disks, such as hybrid arrays or all flash memory arrays. However, if the network bandwidth is limited, or you cannot purchase another storage system, the other option is to install flash storage on the host server

Third, server flash

The flash memory on the host server side can be a solid state storage disk in the form of a drive (SATA or SAS interface), a PCIe flash card, or even a flash memory connected to the memory bus through a dual in-line memory module (DIMM). All of these methods make the performance of flash memory closer to the application processor, rather than the storage array connected to the network, thus providing better storage performance by reducing latency. According to past experience, solid state storage disk is the most economical of the three forms. PCIe cards provide better performance than solid state storage, but generally, the cost per GB is also higher. However, the new form of placing flash memory in memory now provides another way of low latency, which may open some new application modes. If the application can obtain data from the flash cache or flash layer of the server, it no longer needs to request data through the network. The first flash drive in the form of a DIMM is not logically connected to the memory bus, but to the free SATA port on the motherboard.

Fourth, network transmission

Deploying solid-state storage on servers instead of network attached storage systems has some advantages, namely, reducing SAN network transmission. If the application can obtain data from the flash cache or flash layer of the server, it no longer needs to request data through the network. This reduces the workload of the shared storage array and frees up more resources to support other servers. Therefore, the reduction of network transmission makes server flash memory a better choice than buying another shared storage system.

Fifth, starting from the storage bottleneck, solid-state storage usually solves the application performance problem by improving the data processing speed of the server. Essentially, there must be a bottleneck in a certain link of the storage infrastructure. Finding the bottleneck through analysis is the first step to determine the solution. If flash memory can be an accurate solution, one or more of the following resources usually do not show high utilization: host processors, host memory, storage system processors, or network bandwidth. In order to find out which resources are scarce, it is necessary to monitor their utilization over a period of time and compare it with the performance of the application. If the host processor is running near full capacity, storage is usually not the bottleneck, and efforts should be made to solve the problems of computing resources and application architecture. However, if the utilization rate of host processors is low (such as less than 40%) during the period when the application is running slowly, this well reflects the bottleneck in the storage infrastructure.

6、 Once the hierarchical deployment location is determined, it is necessary to determine the choice of storage type (the actual use mode of solid-state storage). In addition to the full flash array, the key to flash implementation is to put the most appropriate data into flash before use, and keep this state in the background. In essence, tiering technology creates a high-speed storage area for the most critical data sets and subsets