Instances›AWS EC2›r5dn›r5dn.large
Compute
vCPUs2
Memory16 GiB
Mem / vCPU8.00 GiB
ProcessorXeon Platinum 8259
Clock speed3.1 GHz
Architecturex86_64
Storage
Type1 × 75 GB NVMe SSD
Bandwidth4,750 Mbps
Throughput593.75 MB/s
IOPS18,750
Networking
PerformanceUp to 25 Gigabit
Max ENIs3
IPv6Yes
GPUNone
Family sizes
r5dn.large2 vCPU · 16 GiB
r5dn.xlarge4 vCPU · 32 GiB
r5dn.2xlarge8 vCPU · 64 GiB
r5dn.4xlarge16 vCPU · 128 GiB
r5dn.8xlarge32 vCPU · 256 GiB
r5dn.12xlarge48 vCPU · 384 GiB
r5dn.16xlarge64 vCPU · 512 GiB
r5dn.24xlarge96 vCPU · 768 GiB
r5dn.metal96 vCPU · 768 GiB
r5dn.large

The r5dn.large is a memory-optimized AWS EC2 instance: 2 vCPU and 16 GiB of memory, 8.00 GiB per vCPU. In the name, "r" stands for RAM, "5" is the generation, "dn" marks local NVMe storage and enhanced networking and "large" is the size within the r5dn family. It runs on Intel Xeon Platinum 8259 (Cascade Lake) at 3.1 GHz, and AWS introduced it in October 2019. AWS has since shipped r6i, r7i, r8i and r9g; r6i.large is the direct replacement at this size. Rackspace Spot's mh.vs1.medium is a like-for-like substitute at 2 vCPU and 16 GiB, about 93% below the US East (N. Virginia) on-demand rate.

Match qualityNo local disk

r5dn.large comes with 1 × 75 GB NVMe SSD attached to the machine. Rackspace Spot nodes use network storage only, so that disk does not come with it.

If you were using the local disk as fast scratch space — temporary files, a local cache, an index — you will need a persistent volume or object storage instead, and both are slower to read. If it was just extra space you never depended on, nothing changes.

Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$0.167$0.043$0.105$0.068$0.011
$0.156 savings
US Central, Chicagono AWS region$0.021
US Central, Dallasno AWS region$0.041
Hong Kong$0.002
Sydney, Australia$0.204$0.047$0.129$0.084$0.011
$0.193 savings
London, UK$0.011
US West, San Jose$0.031
US Central, Dallas 2no AWS region$0.031
When to use it
Good for
  • ●Real-time analytics over hot datasets
  • ●Database instances that keep the working set in RAM
  • ●Graph and search workloads with large indexes
  • ●Workloads that fit inside 16 GiB of RAM
  • ●Jobs that want 1 × 75 GB of local NVMe scratch space
  • ●Network-heavy services — AWS rates this size at Up to 25 Gigabit
Avoid if
  • ●Starting a new deployment. r6i.large is the newer generation at this size.
  • ●The working set needs more than 16 GiB of RAM
  • ●GPU or FPGA acceleration is needed
  • ●CPU-bound work. You are paying for memory this workload will not use.
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
r5dn.large runs $122/mo on AWS on-demand. The equivalent on Rackspace Spot: $8/mo.
  • Spot sells spare capacity at market prices. It is the cheapest compute on the internet.
  • Prices are set by supply and demand. You pay what the market decides.
  • Compute is delivered as fully managed Kubernetes. All infrastructure is taken care of.
  • Egress costs $0.01/GB after the free allowance. AWS charges $0.09/GB.
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