Instances›AWS EC2›r6a›r6a.24xlarge
Compute
vCPUs96
Memory768 GiB
Mem / vCPU8.00 GiB
ProcessorEPYC 7R13 Processor
Clock speed3.6 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth30,000 Mbps
Throughput3750 MB/s
IOPS120,000
Networking
Performance37.5 Gigabit
Max ENIs15
IPv6Yes
GPUNone
Family sizes
r6a.large2 vCPU · 16 GiB
r6a.xlarge4 vCPU · 32 GiB
r6a.2xlarge8 vCPU · 64 GiB
r6a.4xlarge16 vCPU · 128 GiB
r6a.8xlarge32 vCPU · 256 GiB
r6a.12xlarge48 vCPU · 384 GiB
r6a.16xlarge64 vCPU · 512 GiB
r6a.24xlarge96 vCPU · 768 GiB
r6a.32xlarge128 vCPU · 1024 GiB
r6a.48xlarge192 vCPU · 1536 GiB
r6a.metal192 vCPU · 1536 GiB
r6a.24xlarge

The r6a.24xlarge pairs 96 vCPU with 768 GiB of RAM, the 8.00 GiB-per-vCPU ratio that marks a memory-optimized instance. In the name, "r" stands for RAM, "6" is the generation, "a" marks AMD processors and "24xlarge" is the size within the r6a family. It runs on AMD EPYC 7R13 Processor at 3.6 GHz, and AWS introduced it in July 2022. AWS has since shipped r7a, r8a and r9g; r7a.24xlarge is the direct replacement at this size, scoring 2,791,374 CoreMark/s against this instance's 1,818,526 — roughly 53% more throughput for the same vCPU count. Spot's node ladder tops out below this size, so r6a.24xlarge becomes 6 × mh.vs1.2xlarge (96 vCPU, 768 GiB combined), $5.44/hr on AWS in US East (N. Virginia), from $0.126/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

r6a.24xlarge gives you 96 vCPU and 768 GiB in a single machine. The largest comparable Spot node, mh.vs1.2xlarge, is 16 vCPU and 128 GiB, so the equivalent here is 6 nodes rather than one.

Spot runs as managed Kubernetes, so a 6-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 96 cores and 768 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$5.443$1.310$3.601$2.469$0.126
$5.317 savings
US Central, Chicagono AWS region$0.126
US Central, Dallasno AWS region$0.786
Hong Kong$0.126
Sydney, Australia$6.523$2.139$4.310$2.964$0.126
$6.397 savings
London, UK$6.394$0.813$4.239$2.890$0.786
$5.608 savings
US West, San Jose$6.048$1.227$4.001$2.743$0.012
$6.036 savings
US Central, Dallas 2no AWS region$1.452
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 768 GiB of RAM
  • ●Parallel work that can occupy 96 vCPU
  • ●Network-heavy services — AWS rates this size at 37.5 Gigabit
  • ●Anything that shards cleanly across 6 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●Starting a new deployment. r7a.24xlarge is the newer generation at this size.
  • ●The working set needs more than 768 GiB of RAM
  • ●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.
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
$3,974/mo on AWS on-demand against $92/mo on Rackspace Spot for the 6-node equivalent — market-priced, not list-priced.
  • 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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