An alternative solution to the mounting data deluge
CIOs and data centre operators will need to reassess their current storage infrastructure and consider technologies that can address current data storage challenges including data growth and the associated costs.
The general trend has been to increasingly deploy networked storage, whether Network Attached Storage (NAS) or block SAN, however, there is still a large install base of direct attached external and internal storage. DAS can, however, have scalability issues. In the Direct Access Storage (DAS) environment when all server ports are in use, new storage can only be added by adding new servers, which can be extremely expensive and can create storage islands.
Here are some reasons why
Serial Attached SCSI (SAS) switching can solve these problems
September 19, 2011
As data volumes across the world continue to soar, LSI Corporation, a provider of silicon and software technologies, examines the challenges currently being seen by data growth and what CIOs can do to reassess the data storage challenges
1. Expand your businessesundefineds capabilities: Switching significantly expands the capabilities of SAS in DAS environments by allowing multiple servers to connect to one or more external storage systems, therefore lowering acquisition costs without sacrificing expansion capabilities. SAS Switching can support up to 1,000 devices to enable larger SAS topologies and tiered storage solutions
As data creation continues to grow CIOs and data centre operators need to reassess their current storage infrastructure and consider technologies that can address current data storage challenges including data growth and associated costs
2. Assess all the benefits of SAN: SAS Switching offers CIOs all the benefits of a failover SAN with performance of end-to-end native SAS 6Gb/s datapath. It enables you to achieve the same consolidation benefits as a Fibre Channel or IP SAN at an affordable price
3. Keep data close: Shared and Switched SAS brings storage closer to the server, even in networked and cloud scenarios. This significantly reduces storage latency
In order to tackle the rise in data volumes, CIOs can look at a variety of options in order to manage their data content. Two of the most commonly used storage devices are Network Attached Storage (NAS) and Direct Attached Storage (DAS) units. Both are popular but do have their drawbacks
4. Retain performance: In virtualised environments, shared storage capacity can suffer from degraded access time, however, SAS Switching offers low latency with 6Gb/s protocol helping to maintain storage system performance. For the CIO, maintains high performance levels, enabling strategic decision making and ensuring business can efficiently meet customer demands and take advantage of opportunities that add value to the business
5. Shared resources for maximum utilisation: SAS Switching enables storage resources to be shared across multiple hosts and managed through SAS Zoning, therefore maximising storage utilisation and eliminating undefinedstorage islandsundefined as well as enabling independent growth of servers and storage in traditional SAN
An alternative to NAS and DAS is a SAS Switch. SAS Switching is one of the most cost-effective ways of managing data growth while maintaining performance and low latency
6. Make management life easy: SAS Switching allows organisations to realise the benefits of virtual machine migration while maintaining management simplicity of DAS. For example the LSI SAS Switch includes SAS domain management for port configuration, zoning, firmware management, diagnostics and viewing of the SAS topology
By implementing a SAS Switch, CIOs can experience a number of benefits including the ability to expand business capabilities, offering significantly lower latency, improved performance and all at a lower cost.
7. Implementation: Various environments can benefit from the implementation of SAS Switch technology, including: Applications needing shared and pooled storage, increased connectivity or higher availability; customers wanting lower storage acquisition costs or to efficiently connect multiple servers to multiple storage; configurations using tiered storage with SATA+SAS drives
8. Take your cost advantage: Fibre Channel is often deployed for its high performance, but is expensive. iSCSI is less expensive but lacks performance. SAS Switching provides higher performance at a dramatically lower cost. There is also a cost advantage from implementing end-to-end SAS from server, to switch, to external storage, meaning that CIOs and businesses can improve performance and cost effectively