Key customer benefits
Improve user experience
With minimal performance penalty in degraded mode.
Reduce redundancy costs
With faster rebuild times to reduce the risk of array failure.
Keep it simple
No extra configuration is needed!
When evaluating a RAID solution, assessing the performance of the RAID array in the degraded state (one or more drives in the array is not functioning) and reconstructing the state (one or more new drives added to the array) is just as critical as evaluating operation in the normal state. In the degraded state, fewer drives are available to serve IO requests. In the reconstructing state, intra-RAID IO adds traffic as data on good disks is used to reconstruct the data to the newly introduced disks. As the drive capacities have grown, rebuild times have also become longer.
Any time a RAID 5 array is in a degraded state or reconstruction state, the user has 2 problems: (1) lower array performance that impacts the user experience and (2) the risk of losing the array’s data if a 2nd failure occurs. Hence, users often deploy multiple copies of the array to mitigate the problems.
A key feature xiRAID provides is the ability to control the rate of array reconstruction, enabling a predictable reconstruction workload sized to ameliorate contention with host IO. The ScaleFlux CSD 3310 NVMe SSDs feature transparent inline compression that also lowers the impact of intra-RAID reconstruction IO. By transparently compressing data written to the SSD, additional media bandwidth is available for reads. This capability allows the CSD 3310 to maintain a lower read latency profile in the presence of reconstruction IO.
- Combining these technologies enables a best-in-class software RAID solution capable of servicing high-performance workloads under all RAID operating states.
- As the diagram shows, the non-repairing disk…. equal to the workload.
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Optimize Utilization and Reliability for High-Performance Distributed Database Apps
With CSD 3310 SSDs and Xinnor xiRAID