Instances›AWS EC2›r8in›r8in.8xlarge
Compute
vCPUs32
Memory256 GiB
Mem / vCPU8.00 GiB
ProcessorXeon Scalable
Clock speed3.9 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth10,000 Mbps
Throughput1250 MB/s
IOPS40,000
Networking
Performance50 Gigabit
Max ENIs8
IPv6Yes
GPUNone
Family sizes
r8in.large2 vCPU · 16 GiB
r8in.xlarge4 vCPU · 32 GiB
r8in.2xlarge8 vCPU · 64 GiB
r8in.4xlarge16 vCPU · 128 GiB
r8in.8xlarge32 vCPU · 256 GiB
r8in.12xlarge48 vCPU · 384 GiB
r8in.16xlarge64 vCPU · 512 GiB
r8in.24xlarge96 vCPU · 768 GiB
r8in.32xlarge128 vCPU · 1024 GiB
r8in.48xlarge192 vCPU · 1536 GiB
r8in.metal-48xl192 vCPU · 1536 GiB
r8in.96xlarge384 vCPU · 3072 GiB
r8in.metal-96xl384 vCPU · 3072 GiB
r8in.8xlarge

The r8in.8xlarge pairs 32 vCPU with 256 GiB of RAM, the 8.00 GiB-per-vCPU ratio that marks a memory-optimized instance. In the name, "r" stands for RAM, "8" is the generation, "in" marks Intel processors and enhanced networking and "8xlarge" is the size within the r8in family. It runs on Intel Xeon Scalable (Granite Rapids) at 3.9 GHz, and AWS introduced it in April 2026. AWS has since shipped r9g; r9g.8xlarge is the direct replacement at this size. Spot's node ladder tops out below this size, so r8in.8xlarge becomes 2 × mh.vs1.2xlarge (32 vCPU, 256 GiB combined), $3.35/hr on AWS in US East (N. Virginia), from $0.042/hr on Rackspace Spot. Spot delivers compute as managed Kubernetes, so a node pool of that size is the native shape of the answer rather than a workaround — provided the workload scales horizontally.

Match qualityScale-out match

r8in.8xlarge gives you 32 vCPU and 256 GiB in a single machine. The largest comparable Spot node, mh.vs1.2xlarge, is 16 vCPU and 128 GiB, so the equivalent here is 2 nodes rather than one.

Spot runs as managed Kubernetes, so a 2-node pool is the normal way to run things rather than a workaround. If your workload already sits behind a load balancer, a queue or a scheduler, it spreads across them without changes. If it needs all 32 cores and 256 GiB in one process, it does not.

Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$3.347$1.472$0.042
$3.305 savings
US Central, Chicagono AWS region$0.042
US Central, Dallasno AWS region$0.262
Hong Kong$0.042
Sydney, Australia$0.042
London, UK$0.262
US West, San Jose$4.017$1.263$0.004
$4.013 savings
US Central, Dallas 2no AWS region$0.484
When to use it
Good for
  • ●Large JVM heaps and application servers that hold state
  • ●OLAP and business intelligence query engines
  • ●Real-time analytics over hot datasets
  • ●Workloads that fit inside 256 GiB of RAM
  • ●Parallel work that can occupy 32 vCPU
  • ●Network-heavy services — AWS rates this size at 50 Gigabit
  • ●Anything that shards cleanly across 2 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●The working set needs more than 256 GiB of RAM
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●The work is single-threaded. Most of these 32 vCPU would sit idle.
  • ●Local NVMe or instance-store disk is a hard requirement
  • ●GPU or FPGA acceleration is needed
  • ●CPU-bound work. You are paying for memory this workload will not use.
Stop overpaying AWS. This compute costs $2,443/mo on AWS vs $31/mo on Rackspace Spot.
  • 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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Frequently asked questions