The TPC-C benchmark comes closer than synthetic performance benchmarks to gauging the performance strengths and bottlenecks of storage infrastructure in database environments. StorageReview’s Microsoft SQL Server OLTP testing protocol employs the current draft of the Transaction Processing Performance Council’s Benchmark C (TPC-C), an online transaction-processing benchmark that simulates the activities found in complex application environments. This test uses SQL Server 2014 running on Windows Server 2012 R2 guest VMs and is stressed by Quest’s Benchmark Factory for Databases. While our Sysbench workloads tested previously saturated the platform in both storage I/O and capacity, the SQL test is looking for latency performance. From a system resource perspective, we configured each VM with 16 vCPUs, 64GB of DRAM and leveraged the LSI Logic SAS SCSI controller. We are reviewing the 2TB version of the Predator GM7 drive and will be comparing it to the following PCIe Gen4x4 drives:Įach SQL Server VM is configured with two vDisks: 100GB volume for boot and a 500GB volume for the database and log files. For our added BlackMagic Disk Speed Test performed in Windows, we use our self-built StorageReview desktop. We do this because many of the common consumer benchmarks don’t adequately capture end-user workload profiles. A large focus is put on drive latency across the entire load range of the drive, not just at the smallest QD1 (Queue-Depth 1) levels. NVMe is tested natively through an M.2 to PCIe adapter card in the edge-card slot. Predator Storage GM7 SSD Specifications Modelįor database and synthetic testing, we leverage the Lenovo ThinkSystem SR635 server, equipped with an AMD 7742 CPU and 512GB of 3200Mhz DDR4 memory. The GM7 does include HMB (Host Memory Buffer) and SLC cache to help provide burst performance without the DRAM by reducing the time it takes to read and write data however, gains in performance will depend on the size of the cache and the workload being performed.īacked by a 5-year warranty, the Predator GM7 goes for roughly $49.99 (512GB), $89.99 (1TB), and $159.99 (2TB). That said, DRAM-less drives like the GM7 often have slower performance, such as during large sequential transfers. This makes it a very attainable drive for those with strict budgets and mainstream use cases. The new Predator drive does not use a DRAM cache, which typically helps drive down costs and lowers power consumption (in this case, a maximum of just 5.67 W) compared to an SSD with DRAM. That said, there are plenty of other parts of the world where this drive will ship.Īs far as performance goes, the GM7 is quoted to reach up to the usual 7,400MB/s read and 6,300MB/s write as well as up to 100,000 IOPS. While this NAND type is permitted to be imported as a packaged product in numerous countries, it is expected that OEMs in the US will choose to avoid using it in their products. There’s also a bit of import confusion around this drive as well, as the GM7 uses controversial Chinese YTMC NAND. Thanks.It should be noted that it can be somewhat unclear which company it actually belongs to, as it could be either branded as an Acer or HP drive (and there is little to no information on the Predator website regarding official specifications). I will attach a link to the local disk speed test I ran directly on the NAS, and hopefully someone can help me make sense of it. I have the same drives in a 10TB version in my 1019+ and they have been running perfectly for a long time. Synology refuses to help because the HDD are not on their compatibility list so I don't know if that automatically means the drives won't work, or they are just using it as an excuse. The 1Gb connection does the same thing on file transfers, just with smaller swings since it maxes at 110MB/s. Other times they will max out well below 50MB/s and never improve. The file transfers sometimes start at a good speed then drop off, sometimes they start at 250MB/s and bounce between there and 30MB/s every second or so. Black Magic Disk Speed Test mirrors the actual file transfer performance which is to say that sometimes it reads 600MB/s and a minute later it might show 30MB/s. I thought it was a network issue, but both adapters have the same problem, and iperf3 shows consistent 7Gbps results on the 10Gb line, 950Mbps on the 1Gb line. I also have problems with transfers over the 1Gb connection. I am using a Windows 10 PC with a Intel x540 10Gb card directly connected to the NAS which has a Synology 10Gb card. All files transfers are large, 20GB+ files. All drives passed the extended test before being installed, and are only a month old. I am having problems with the speed of file transfers on my new Synology 1821+ which has 5x14TB WD White label drives shucked from WD EasyStores.
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