AWS

c1.xlarge

EC2 Instance

About the

c1.xlarge

instance

Legacy compute-optimized instance with 8 vCPUs and 7 GiB memory. Higher compute capacity for CPU-intensive applications.

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Pricing of

c1.xlarge

N/A

On Demand

N/A

Spot

N/A

1 Yr Reserved

N/A

3 Yr Reserved

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Spot Pricing Details for

c1.xlarge

Here's the latest prices for this instance across this region:

Availability Zone	Current Spot Price (USD)

Frequency of Interruptions: n/a

Frequency of interruption represents the rate at which Spot has reclaimed capacity during the trailing month. They are in ranges of < 5%, 5-10%, 10-15%, 15-20% and >20%.

Last Updated On: December 17, 2024

Compute features of

c1.xlarge

Feature	Specification

Storage features of

c1.xlarge

Feature	Specification

Networking features of

c1.xlarge

Feature	Specification

Operating Systems Supported by

c1.xlarge

Operating System	Supported

Security features of

c1.xlarge

Feature	Supported

General Information about

c1.xlarge

Feature	Specification

Benchmark Test Results for

c1.xlarge

CPU Encryption Speed Benchmarks

Cloud Mercato tested CPU performance using a range of encryption speed tests:

Encryption Algorithm	Speed (1024 Block Size, 3 threads)
AES-128 CBC	N/A
AES-256 CBC	N/A
MD5	N/A
SHA256	N/A
SHA512	N/A

I/O Performance

Cloud Mercato's tested the I/O performance of this instance using a 100GB General Purpose SSD. Below are the results:

	Read	Write
Max	N/A	N/A
Average	N/A	N/A
Deviation	N/A	N/A
Min	N/A	N/A

I/O rate testing is conducted with local and block storages attached to the instance. Cloud Mercato uses the well-known open-source tool FIO. To express IOPS the following parametersare used: 4K block, random access, no filesystem (except for write access with root volume and avoidance of cache and buffer.

See

Cloud Mercato's full benchmark results for this instance here

Community Insights for

c1.xlarge

AI-summarized insights

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While the chart above is a good start, there‚Äôs more than simply considering ‚ÄúReserved vs. On Demand‚Äù. So let‚Äôs take a closer look at all the options‚Ä¶

19-03-2025

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cost_savings

On the slower instance, you may have a busy neighbor.

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Lately I've launched a few EC2 c1.xlarge instances with identical setups to ones that I launch a few months ago and I've found that the new ones have 5-10 times the CPU usage.

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You have probably observed a _known_ issue with EC2: even within the same EC2 instance type, heterogenous hardware might be used, resulting in potentially high performance variations.

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EC2 instances are priced according to instance type, regardless of the number of CPUs enabled. Disabling vCPUs does not change the cost of the instance type.

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