diff --git a/.github/workflows/audit.yml b/.github/workflows/audit.yml
index 661ef05a..d54bbfef 100644
--- a/.github/workflows/audit.yml
+++ b/.github/workflows/audit.yml
@@ -40,7 +40,7 @@ env:
 jobs:
   security-audit:
     name: Security Audit
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 15
     steps:
       - name: Checkout repository
@@ -65,7 +65,7 @@ jobs:
 
   dependency-review:
     name: Dependency Review
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     if: github.event_name == 'pull_request'
     permissions:
       contents: read
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a70e6aab..7390d7c8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -83,7 +83,7 @@ jobs:
   # Build strategy check - determine build type based on trigger
   build-check:
     name: Build Strategy Check
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     outputs:
       should_build: ${{ steps.check.outputs.should_build }}
       build_type: ${{ steps.check.outputs.build_type }}
@@ -167,19 +167,19 @@ jobs:
       matrix:
         include:
           # Linux builds
-          - os: ubicloud-standard-4
+          - os: ubicloud-standard-2
             target: x86_64-unknown-linux-musl
             cross: false
             platform: linux
-          - os: ubicloud-standard-4
+          - os: ubicloud-standard-2
             target: aarch64-unknown-linux-musl
             cross: true
             platform: linux
-          - os: ubicloud-standard-4
+          - os: ubicloud-standard-2
             target: x86_64-unknown-linux-gnu
             cross: false
             platform: linux
-          - os: ubicloud-standard-4
+          - os: ubicloud-standard-2
             target: aarch64-unknown-linux-gnu
             cross: true
             platform: linux
@@ -532,7 +532,7 @@ jobs:
     name: Build Summary
     needs: [ build-check, build-rustfs ]
     if: always() && needs.build-check.outputs.should_build == 'true'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     steps:
       - name: Build completion summary
         shell: bash
@@ -584,7 +584,7 @@ jobs:
     name: Create GitHub Release
     needs: [ build-check, build-rustfs ]
     if: startsWith(github.ref, 'refs/tags/') && needs.build-check.outputs.build_type != 'development'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     permissions:
       contents: write
     outputs:
@@ -670,7 +670,7 @@ jobs:
     name: Upload Release Assets
     needs: [ build-check, build-rustfs, create-release ]
     if: startsWith(github.ref, 'refs/tags/') && needs.build-check.outputs.build_type != 'development'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     permissions:
       contents: write
       actions: read
@@ -751,7 +751,7 @@ jobs:
     name: Update Latest Version
     needs: [ build-check, upload-release-assets ]
     if: startsWith(github.ref, 'refs/tags/')
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     steps:
       - name: Update latest.json
         env:
@@ -801,7 +801,7 @@ jobs:
     name: Publish Release
     needs: [ build-check, create-release, upload-release-assets ]
     if: startsWith(github.ref, 'refs/tags/') && needs.build-check.outputs.build_type != 'development'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     permissions:
       contents: write
     steps:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3c7e7662..9dc5da56 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -78,7 +78,7 @@ jobs:
     permissions:
       actions: write
       contents: read
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     outputs:
       should_skip: ${{ steps.skip_check.outputs.should_skip }}
     steps:
@@ -93,7 +93,7 @@ jobs:
 
   typos:
     name: Typos
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     steps:
       - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
@@ -104,7 +104,7 @@ jobs:
     name: Test and Lint
     needs: skip-check
     if: needs.skip-check.outputs.should_skip != 'true'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 60
     steps:
       - name: Checkout repository
@@ -136,7 +136,7 @@ jobs:
     name: End-to-End Tests
     needs: skip-check
     if: needs.skip-check.outputs.should_skip != 'true'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 30
     steps:
       - name: Checkout repository
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 37d41b50..383dcd57 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -72,7 +72,7 @@ jobs:
   # Check if we should build Docker images
   build-check:
     name: Docker Build Check
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     outputs:
       should_build: ${{ steps.check.outputs.should_build }}
       should_push: ${{ steps.check.outputs.should_push }}
@@ -264,7 +264,7 @@ jobs:
     name: Build Docker Images
     needs: build-check
     if: needs.build-check.outputs.should_build == 'true'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 60
     steps:
       - name: Checkout repository
@@ -404,7 +404,7 @@ jobs:
     name: Docker Build Summary
     needs: [ build-check, build-docker ]
     if: always() && needs.build-check.outputs.should_build == 'true'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     steps:
       - name: Docker build completion summary
         run: |
diff --git a/.github/workflows/e2e-mint.yml b/.github/workflows/e2e-mint.yml
index 5923cfde..a9de46f7 100644
--- a/.github/workflows/e2e-mint.yml
+++ b/.github/workflows/e2e-mint.yml
@@ -37,7 +37,7 @@ env:
 
 jobs:
   mint-single:
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 40
     steps:
       - name: Checkout
@@ -114,7 +114,7 @@ jobs:
   mint-multi:
     if: github.event_name == 'workflow_dispatch' && github.event.inputs.run-multi == 'true'
     needs: mint-single
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 60
     steps:
       - name: Checkout
diff --git a/.github/workflows/e2e-s3tests.yml b/.github/workflows/e2e-s3tests.yml
index e29d13aa..e23e3a94 100644
--- a/.github/workflows/e2e-s3tests.yml
+++ b/.github/workflows/e2e-s3tests.yml
@@ -58,7 +58,7 @@ defaults:
 jobs:
   s3tests-single:
     if: github.event.inputs.test-mode == 'single'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 120
     steps:
       - uses: actions/checkout@v6
@@ -212,7 +212,7 @@ jobs:
 
   s3tests-multi:
     if: github.event_name == 'workflow_dispatch' && github.event.inputs.test-mode == 'multi'
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 150
     steps:
       - uses: actions/checkout@v6
diff --git a/.github/workflows/helm-package.yml b/.github/workflows/helm-package.yml
index ca9aec56..954d7c41 100644
--- a/.github/workflows/helm-package.yml
+++ b/.github/workflows/helm-package.yml
@@ -27,7 +27,7 @@ env:
 
 jobs:
   build-helm-package:
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     # Only run on successful builds triggered by tag pushes (version format: x.y.z or x.y.z-suffix)
     if: |
       github.event.workflow_run.conclusion == 'success' && 
@@ -63,7 +63,7 @@ jobs:
           retention-days: 1
 
   publish-helm-package:
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     needs: [ build-helm-package ]
 
     steps:
diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index c2b2ea6f..954fd000 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -40,7 +40,7 @@ env:
 jobs:
   performance-profile:
     name: Performance Profiling
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 30
     steps:
       - name: Checkout repository
@@ -115,7 +115,7 @@ jobs:
 
   benchmark:
     name: Benchmark Tests
-    runs-on: ubicloud-standard-4
+    runs-on: ubicloud-standard-2
     timeout-minutes: 45
     steps:
       - name: Checkout repository