Instances›AWS EC2›r3›r3.4xlarge
Compute
vCPUs16
Memory122 GiB
Mem / vCPU7.63 GiB
ProcessorXeon E5-2670 v2
Clock speed2.5 GHz
Architecturex86_64
Storage
Type1 × 320 GB SSD
Bandwidth2,000 Mbps
Throughput250 MB/s
IOPS16,000
Networking
PerformanceHigh
Max ENIs8
IPv6Yes
GPUNone
Family sizes
r3.large2 vCPU · 15.25 GiB
r3.xlarge4 vCPU · 30.5 GiB
r3.2xlarge8 vCPU · 61 GiB
r3.4xlarge16 vCPU · 122 GiB
r3.8xlarge32 vCPU · 244 GiB
r3.4xlarge

The r3.4xlarge pairs 16 vCPU with 122 GiB of RAM, the 7.63 GiB-per-vCPU ratio that marks a memory-optimized instance. In the name, "r" stands for RAM, "3" is the generation and "4xlarge" is the size within the r3 family. It runs on Intel Xeon E5-2670 v2 (Ivy Bridge) at 2.5 GHz, and AWS introduced it in April 2014. AWS has since shipped r4, r5, r6i and r7i; r4.4xlarge is the direct replacement at this size. mh.vs1.2xlarge on Rackspace Spot lines up one-for-one: 16 vCPU and 128 GiB, $1.33/hr on AWS in US East (N. Virginia), from $0.021/hr on Rackspace Spot.

Match qualityNo local disk

r3.4xlarge comes with 1 × 320 GB 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$1.330$0.321$0.836$0.021
$1.309 savings
US Central, Chicagono AWS region$0.021
US Central, Dallasno AWS region$0.131
Hong Kong$0.021
Sydney, Australia$1.596$0.500$1.193$0.021
$1.575 savings
London, UK$0.131
US West, San Jose$1.482$0.209$1.087$0.002
$1.480 savings
US Central, Dallas 2no AWS region$0.242
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 122 GiB of RAM
  • ●Jobs that want 1 × 320 GB of local SSD scratch space
Avoid if
  • ●Starting a new deployment. r4.4xlarge is the newer generation at this size.
  • ●The working set needs more than 122 GiB of RAM
  • ●GPU or FPGA acceleration is needed
  • ●CPU-bound work. You are paying for memory this workload will not use.
  • ●More than 7.63 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●The work is single-threaded. Most of these 16 vCPU would sit idle.
r3.4xlarge runs $971/mo on AWS on-demand. The equivalent on Rackspace Spot: $15/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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