In response to data storage challenges including current data growth and related costs, it is necessary for CIOs and data center operators to reassess their current storage infrastructure and consider using appropriate technologies to address these issues. "As long as more storage space is needed, buy more servers" is no longer applicable to the challenges of today's data storage. SAS is an excellent architecture that users can afford, easy to manage, and simple storage deployment. It is also a compelling network-based storage design alternative. Using the sharable features of the core of SAS expander devices, building new products such as SAS switches can effectively deal with the challenges brought about by the data explosion. The new connector technology and the further improvement of expander connection management capabilities also point the way to greater possibilities for future development.
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The general trend is to increase the deployment of network storage, whether it is network attached storage (NAS) or block SAN. But the scale of installed direct-attached external storage and internal storage is still quite large. But direct-attached storage always has scalability issues. In a direct-attached storage (DAS) environment, if all server ports are occupied, new storage can only be added by adding new servers, which is extremely costly and can lead to storage silos.
As the amount of data in the world continues to grow, leading chip and software technology provider LSI has conducted in-depth research on the challenges posed by current data growth and the measures that CIOs can take to reassess data storage challenges It also explains the eight reasons why serial SCSI (SAS) switching technology can solve current and future storage problems:
1. Undefined functions for extended services: Using switching technology, multiple servers can be connected to one or more external storage systems, which can significantly expand the functions of SAS in the DAS environment, thereby reducing the performance without sacrificing extended functions purchase cost. SAS switching technology can support up to 1,000 devices, enabling a larger-scale SAS topology and tiered storage solution. As the amount of data continues to increase, CIOs and data center operators need to reassess their current storage infrastructure and consider using appropriate technologies to address current data storage challenges, including data growth and related costs.
2. Leverage all the advantages of SAN: SAS switching technology has the end-to-end native SAS 6Gb / s data path performance and can provide the chief information officer with all the advantages of failover SAN. It can provide the same centralized advantages as Fibre Channel or IP SAN at an affordable price.
3. Keep data at your fingertips: Shared SAS with switching technology can bring storage closer to the server, even in network and cloud environments. This can greatly reduce the storage delay, so as to effectively cope with the increase in data volume. The CIO can consider various measures to manage the data content. The two most commonly used storage devices are network attached storage (NAS) and direct attached storage (DAS) devices. Both devices are widely used, but have their own shortcomings.
4. Maintain performance: In a virtualized environment, the shared storage capacity will be adversely affected due to the deterioration of access time, but the SAS switching technology using the 6Gb / s protocol can achieve low latency and help maintain storage system performance. For CIOs, maintaining high performance levels, realizing strategic decision-making and ensuring business can effectively meet customer needs and make full use of opportunities that can add value to the business.
5. Share resources to achieve maximum utilization: using SAS switching technology, storage resources can be shared across multiple hosts and storage resources can be managed through SAS partitions to achieve maximum storage utilization, eliminate storage silos, and enable servers and storage Achieve independent growth in a traditional SAN. SAS switches provide another option beyond NAS and DAS. SAS switching technology is one of the lowest cost methods that can manage data growth while maintaining performance and low latency.
6. Simplify management: SAS switching technology can not only allow organizations to realize the advantages brought by virtual machine migration, but also maintain the simplicity of DAS management. For example, LSI SAS switches have built-in SAS domain management functions, which can implement port configuration, zoning, firmware management, diagnosis, and viewing of SAS topology. By adopting SAS switches, the CIO can realize a series of advantages, including business function expansion, significant reduction in latency, performance improvement and cost reduction.
7. Implementation: All types of environments can benefit from the implementation of SAS switching technology, including: applications that require shared and pooled storage, stronger connectivity, or higher availability; need to reduce storage procurement costs or require more Clients that realize efficient interconnection between multiple servers and multiple storages; use SATA + SAS drives to build a tiered storage configuration.
8. Take advantage of cost: The reason for deploying Fibre Channel is often its high performance, but the cost is very high. iSCSI costs are lower, but performance is poor. SAS switching technology can provide higher performance at a significantly lower cost. The implementation of end-to-end SAS from servers to switches and to external storage can also provide significant cost advantages, which means that the technology can effectively help CIOs and enterprises improve performance and reduce costs.
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