Virtualization is a game-changer in the IT world, and as technology evolves, virtualization becomes increasingly important in data centers. Vendors are now offering vast storage capacity and innovation, such as software-defined storage systems (SDS). However, storage management is still a challenge in most companies. Storage area network (SAN) are the most popular storage systems for virtualization for their flexibility, scalability, and high performance. Yet, to ensure the optimal performance and scalability of a SAN storage system, there are some best practices to be followed.
SAN Array Design
The SAN array design must be designed flawlessly to meet the needs of a virtualization environment. LUNs (Logical Unit Numbers) are a group of disk blocks from which virtual disk files (VMDKs) are created. Ensure that the SAN array design has enough LUNs on each disk spindle. By doing so, you will boost performance and minimize contention on disk spindles. Configure LUN-to-spindle mapping to optimize disk queue depth and ensure that the LUNs and RAID groups have enough capacity for good read/write performance.
Use Correct Storage Protocols
In virtualized environments, the iSCSI protocol is the most preferred method for connecting disk arrays to hypervisors. Fibre Channel (FC) protocol is also supported and commonly used for larger, more complex environments with advanced features. The protocol used can impact the performance of a SAN storage system significantly. Ensure that you use the proper protocol on both the server and storage sides to ensure optimization.
Right RAID Level Selection
RAID (Redundant Array of Independent Disks) configuration should be taken seriously when choosing storage systems for virtualization. RAID 5 provides adequate redundancy, improves write speeds, and offers better storage capacity, ideal for VMDK storage. On the other hand, RAID 10 is more suited for applications that require high-speed read times, such as databases and email systems.
Proper Capacity Planning
Proper capacity planning entails predicting the storage needs of the virtualization environment and growing with the organization. Ensure that the storage arrays have reserves to account for growth and future requirements by planning ahead. Scaly up the SAN capacity to accommodate several virtual machines and applications simultaneously.
Utilize Array Monitoring and Analysing Tools
A SAN storage system is an intricate system that requires continuous monitoring to ensure optimal performance. Use monitoring and analysis tools to detect SAN storage problems and determine their root cause. This information can guide you on necessary SAN storage maintenance and upgrades.
Conclusion
Optimizing SAN storage in a virtualization environment requires careful planning and execution. Ensure your SAN array design fits virtualization's unique needs and provides enough capacity for the organization's growth. Use the proper storage protocols, RAID configurations, and array monitoring tools to ensure the optimal performance of your SAN storage solution. By following these practices, you can minimize the chances of storage errors, downtimes, and lost data, making you well on your way to a highly efficient virtualization environment.
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