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SanDisk ULLtraDIMM DDR3 400GB SSD Enterprise Review (Page 9)

By Paul Alcorn on Nov 10, 2014 08:05 am CST
Rating: 97%Manufacturer: SanDisk

128k Sequential Read/Write


128k sequential speed reflects the maximum sequential throughput of the SSD, and is indicative of performance in OLAP, batch processing, streaming, content delivery applications, and backup scenarios.

Our multi-threaded sequential testing is very demanding; two ULLtraDIMMs with 100% utilization provide 1,323 MB /s, and at 70% utilization, they deliver 1,307 MB /s. A single ULLtraDIMM with 100% utilization delivers 698 MB/s, and with 70% utilization, it averages 691 MB/s.


A single 12Gb/s SSD800MH nearly reaches the sequential speed of two ULLtraDIMMs, which also provide excellent latency and performance.


Sequential write performance is important in tasks such as caching, replication, HPC, content delivery applications, and database logging. Two ULLtraDIMMs in RAID with 70% and 100% utilization average 828 MB/s. A single ULLtraDIMM averages 407 MB/s with both usage scenarios.


The dual ULLtraDIMMs take the win in this test. The ULLtraDIMMs clearly benefit from the enhanced parallelism when deployed in RAID, and don't require associated HBA/RAID controllers and cabling.


In mixed sequential workloads, the ULLtraDIMMs scale particularly well, and the benefits of extra overprovisioning provide a clear performance benefit.

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Paul Alcorn


The quest for benchmark world records led Paul further and further down the overclocking rabbit hole. SSDs and RAID controllers were a big part of that equation, allowing him to push performance to the bleeding edge. Finding the fastest and most extreme storage solutions led to experience with a myriad of high-end enterprise devices. Soon testing SSDs and Enterprise RAID controllers at the limits of their performance became Paul's real passion, one that is carried out through writing articles and reviews.

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