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비용 분석 (Cost Analysis)

AWS BLAST Performance Testing - Detailed Cost Analysis

Region: ap-northeast-2 (Seoul)

1. Amazon EFS (Elastic File System) Costs

Storage Configuration

Parameter Value
File System ID fs-0d2d032d1cca25f3f
Name blast-perf-test-efs-nt-db
Total Size 254.32 GB (273,049,319,424 bytes)
Storage Class Standard
Throughput Mode Elastic
Performance Mode General Purpose
Encrypted Yes (KMS)

EFS Pricing (ap-northeast-2)

Cost Type Price Unit
Standard Storage $0.36 per GB-month
Elastic Throughput - Read $0.043 per GB transferred
Elastic Throughput - Write $0.086 per GB transferred

Today's EFS Usage

Metric Value
Data Read 1,635.61 GB (1,756,004,236,096 bytes)
Data Write ~0 GB
Total I/O 1,635.66 GB (1,756,058,129,368 bytes)

EFS Cost Breakdown

Monthly Storage Cost

254.32 GB x $0.36/GB = $91.56/month
Daily: $91.56 / 30 = $3.05/day

Today's Throughput Cost (Read Operations)

1,635.61 GB x $0.043/GB = $70.33

Total EFS Cost (Today)

Component Cost
Storage (daily) $3.05
Read Throughput $70.33
Write Throughput ~$0
Total $73.38

2. Amazon S3 Costs

S3 Bucket Configuration

Parameter Value
Bucket Name blast-perf-test-queries-664263524008
Total Size 236.05 MB (247,421,178 bytes)
Storage Class Standard
Number of Objects 10

S3 Objects Detail

File Size Purpose
queries/query.fasta 75 KB Original query (500 seqs)
queries/query_5000.fasta 755 KB 5,000 sequences
queries/query_50000.fasta 7.4 MB 50,000 sequences
queries/query_500000.fasta 73.7 MB 500,000 sequences
results/* (6 files) 154 MB BLAST output files

S3 Pricing (ap-northeast-2)

Cost Type Price Unit
Standard Storage $0.025 per GB-month
PUT/COPY/POST/LIST $0.0045 per 1,000 requests
GET/SELECT $0.0004 per 1,000 requests
Data Transfer (to Internet) $0.126 per GB (after 100GB free)
Data Transfer (to Same Region) $0.00 Free

S3 Cost Breakdown

Monthly Storage Cost

0.236 GB x $0.025/GB = $0.006/month (~$0.0002/day)

Today's Request Costs (Estimated)

Request Type Count Cost
PUT (uploads) ~10 $0.000045
GET (downloads by Batch) ~8 $0.0000032
LIST ~20 $0.00009
Total Requests ~38 $0.00014

Data Transfer

  • S3 to EC2 (same region): Free
  • EC2 to S3 (same region): Free

Total S3 Cost (Today)

Component Cost
Storage (daily) $0.0002
API Requests $0.0001
Data Transfer $0.00
Total < $0.01

3. Amazon EC2 Costs (via AWS Batch)

Instance Configuration

Instance Type vCPU Memory On-Demand Price/hr
r6i.24xlarge 96 768 GB $7.776
r7i.24xlarge 96 768 GB $8.1648

Performance Test Execution Costs

Test Sequences Runtime Instance EC2 Cost
Test 1 500 3m 56s r6i.24xlarge $0.51
Test 2 5,000 4m 46s r6i.24xlarge $0.62
Test 3 50,000 5m 59s r6i.24xlarge $0.78
Test 4 500,000 25m 9s r6i.24xlarge $3.27
Total 555,500 ~40m $5.18

Cost Calculation Formula

EC2 Cost = (Runtime in hours) x (Hourly rate)
Example: 3m 56s = 0.0656 hours x $7.776 = $0.51

4. AWS API Costs

AWS Batch API

  • Cost: Free (no charge for Batch API calls)
  • Usage: Job submission, status checks, describe operations

CloudWatch Logs

Component Cost
Log Ingestion $0.76 per GB
Log Storage $0.0314 per GB-month
Estimated daily logs ~10 MB
Daily Cost ~$0.008

CloudWatch Metrics

  • Basic Metrics: Free (EC2, EFS, S3 standard metrics)
  • Custom Metrics: Not used

Other API Costs

Service Cost
IAM API Free
EC2 API Free
EFS API Free
S3 API Included in request costs

5. Total Cost Summary (Today's Performance Test)

Direct Costs

Service Cost Notes
EC2 (Batch) $5.18 4 jobs, ~40 min total
EFS Storage $3.05 Daily portion of $91.56/month
EFS Throughput $70.33 1.6 TB read (BLAST DB)
S3 Storage < $0.01 236 MB
S3 Requests < $0.01 ~38 requests
CloudWatch ~$0.01 Logs & metrics
Total Direct $78.57

Cost Distribution

EFS Throughput:   89.5% ($70.33)
EC2 Compute:       6.6% ($5.18)
EFS Storage:       3.9% ($3.05)
Other:             0.0% ($0.01)

6. Per-Sequence Cost Analysis

Sequences Total Cost* Cost per 1,000 Seqs EFS Read per Job
500 $18.11 $36.22 ~400 GB
5,000 $18.22 $3.64 ~400 GB
50,000 $18.38 $0.37 ~400 GB
500,000 $20.87 $0.04 ~435 GB

*Includes estimated EFS read costs (~$17.60 per job for ~409 GB average read)

Key Insight

  • EFS throughput is the dominant cost (89% of total)
  • Each BLAST job reads ~400+ GB from EFS (database loading + search)
  • EC2 compute cost is relatively small (6.6%)

7. Cost Optimization Recommendations

Immediate Optimizations

  1. EFS Throughput Mode

    • Current: Elastic ($0.043/GB read)
    • Alternative: Provisioned Throughput
    • Savings: If consistent usage, provisioned may be cheaper

  2. Database Caching Strategy

    • Use instance store or EBS for frequently accessed DB portions
    • Potential savings: 50-70% on EFS throughput

  3. Batch Job Consolidation

    • Run multiple query files in single job
    • Amortize database loading cost across more sequences

Long-term Optimizations

Strategy Potential Savings Complexity
Use Spot Instances 60-80% on EC2 Low
EBS-backed BLAST DB 70%+ on storage I/O Medium
Smaller instance types Variable Low
Reserved Instances 30-50% on EC2 Medium 
                    +---------------------+
                    |   EBS Snapshot      |
                    |   (BLAST Database)  |
                    +----------+----------+
                               | Attach on launch
                               v
+-------------+    +---------------------+
| S3 (queries)|---→|  EC2 Spot Instance  |
+-------------+    |  + EBS Volume       |
                   |  (local DB copy)    |
                   +----------+----------+
                              |
                              v
                   +---------------------+
                   |   S3 (results)      |
                   +---------------------+

Estimated savings with EBS: $70+ per day (eliminating EFS throughput)

8. Monthly Cost Projection

Current Architecture (with EFS Elastic)

Component Monthly Cost Assumptions
EFS Storage $91.56 254 GB Standard
EFS Throughput $2,110+ 50 TB read/month
EC2 (Batch) $155+ ~20 hours/month
S3 < $1 Minimal storage
Total ~$2,360/month

Optimized Architecture (with EBS)

Component Monthly Cost Assumptions
EBS Snapshot $12.70 254 GB @ $0.05/GB
EBS Volume Usage ~$50 Attached during jobs
EC2 Spot $31+ 60% savings
S3 < $1
Total ~$95/month

Potential Monthly Savings: ~$2,265 (96%)

Appendix: Pricing References

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