rosi-shapeblue commented on PR #12014:
URL: https://github.com/apache/cloudstack/pull/12014#issuecomment-3636779570
## DRS Performance Optimization Test Results
**Environment:** CloudStack 4.20.2.0 (WITHOUT PR) / 4.20.3.0 (WITH PR) |
Simulator | 15 hosts, 150 VMs
### Test Summary
| Test Case | Description | Result |
|-----------|-------------|--------|
| TC1 | Performance Baseline Comparison | PASS |
| TC2 | DRS Migration Execution Validation | PASS |
| TC3 | Condensed Algorithm Verification | PASS |
| TC4 | Affinity Rules Compliance | PASS |
| TC5 | Scale and Consistency Testing | PASS |
| TC6 | Edge Case Handling | PASS |
| TC7 | Regression Testing | PASS |
---
### TC1: Performance Baseline Comparison
**Result: PASS - 3.6x performance improvement (150s -> 42s)**
| Environment | Run 1 | Run 2 | Run 3 | Average |
|-------------|-------|-------|-------|---------|
| WITHOUT PR | 2m30s | 2m34s | 2m28s | ~150s |
| WITH PR | 44s | 41s | 42s | ~42s |
#### WITHOUT PR (10.0.35.218)
<details><summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [Run 1:
2m30.958s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "974a5d16-e4e3-4e09-b976-1a589ac1818e",
"id": "f5e24fdc-b6d2-4191-aa81-6a3630bcd4a1",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"destinationhostname":
"SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"sourcehostname":
"SimulatedAgent.2f0b0205-28e0-4ab9-96cc-957f8230d894",
"virtualmachineid": "12c0a3c4-5494-46a2-b8d5-e43c69c8af33",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"destinationhostname":
"SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"sourcehostname":
"SimulatedAgent.f05f652c-7908-4212-842a-724e6b993884",
"virtualmachineid": "1b6a7275-19a7-459a-83ea-32475cdcaa22",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"destinationhostname":
"SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"sourcehostname":
"SimulatedAgent.d006e660-69b7-4475-8cb2-d8626f58f156",
"virtualmachineid": "4c891cf8-ee96-467a-a307-f95b5bda3cad",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"destinationhostname":
"SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"sourcehostname":
"SimulatedAgent.2f0b0205-28e0-4ab9-96cc-957f8230d894",
"virtualmachineid": "ea4fac53-b639-4b37-84f6-11111c68af49",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "d875cf86-984d-42c3-87f2-1d94cf76309e",
"destinationhostname":
"SimulatedAgent.d8e60b91-775a-4017-ba25-b62bdcdcb5c7",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"sourcehostname":
"SimulatedAgent.f05f652c-7908-4212-842a-724e6b993884",
"virtualmachineid": "297d1b66-e8a6-4b94-a1d9-0d906c7ffa48",
"virtualmachinename": "i-2-19-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [Run 2:
2m34.215s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "29d3428e-896b-4231-bbed-cf18b54efc0e",
"id": "306e348d-f69b-49e2-93e4-2dd74fc58a44",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "d875cf86-984d-42c3-87f2-1d94cf76309e",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-19-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [Run 3:
2m28.971s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "e7a321b7-f530-432b-8d0a-962872aa8846",
"id": "5810b2f7-a384-46a3-966d-edb46025bd6c",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "d875cf86-984d-42c3-87f2-1d94cf76309e",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-19-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
#### WITH PR (10.0.33.97)
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [Run 1:
0m44.479s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "f62e5cb6-6228-46f3-a319-b21f0f8f4838",
"id": "0bfc36d1-e36c-4c67-9c09-d031dd57a91b",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "67efe13d-abb1-4493-9ec5-52c970186c99",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-19-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [Run 2:
0m40.830s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "9580b28c-e8bd-46b6-a98e-741383b4ae44",
"id": "e317dd0d-b5c3-4d0c-a827-89151fe25e29",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-19-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [Run 3:
0m42.268s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "00143dd0-6c98-4c68-868a-8f9f057b4069",
"id": "114bd182-d2d0-4c81-96f0-fb162b3acdc5",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "67efe13d-abb1-4493-9ec5-52c970186c99",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-19-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
**Observations:** Both environments suggest the same VMs for migration.
Functional correctness maintained.
---
### TC2: DRS Migration Execution Validation
**Result: PASS - DRS recommendations are correct and executable**
**Step 1:** Check VM placement before migration
<details>
<summary>echo "list virtualmachines id=12c0a3c4-5494-46a2-b8d5-e43c69c8af33
filter=id,name,hostid,hostname" | cmk</summary>
```json
{
"count": 1,
"virtualmachine": [
{
"hostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"hostname": "SimulatedAgent.2f0b0205-28e0-4ab9-96cc-957f8230d894",
"id": "12c0a3c4-5494-46a2-b8d5-e43c69c8af33",
"name": "drs-test-vm-37"
}
]
}
```
</details>
**Step 2:** Generate DRS plan with execute=true
<details>
<summary>echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=2 execute=true" |
cmk</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "32c5d2b1-c24f-4075-8c48-3db91216d390",
"id": "097302f8-c12a-4ac2-96cc-d3e538380c30",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"destinationhostname":
"SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"sourcehostname":
"SimulatedAgent.2f0b0205-28e0-4ab9-96cc-957f8230d894",
"virtualmachineid": "12c0a3c4-5494-46a2-b8d5-e43c69c8af33",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"destinationhostname":
"SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"sourcehostname":
"SimulatedAgent.f05f652c-7908-4212-842a-724e6b993884",
"virtualmachineid": "1b6a7275-19a7-459a-83ea-32475cdcaa22",
"virtualmachinename": "i-2-11-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
**Step 3:** Manual migration to validate DRS recommendation
```
echo "migrateVirtualMachine
virtualmachineid=12c0a3c4-5494-46a2-b8d5-e43c69c8af33
hostid=fca5a008-952f-4ca5-8a60-2213cfde4b5a" | cmk
```
**Step 4:** Verify VM moved to DRS-recommended destination
<details>
<summary>echo "list virtualmachines id=12c0a3c4-5494-46a2-b8d5-e43c69c8af33
filter=id,name,hostid,hostname" | cmk</summary>
```json
{
"count": 1,
"virtualmachine": [
{
"hostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"hostname": "SimulatedAgent.a9cb3969-0455-4dde-9cce-2e64a3e2c094",
"id": "12c0a3c4-5494-46a2-b8d5-e43c69c8af33",
"name": "drs-test-vm-37"
}
]
}
```
</details>
**Note:** The `execute=true` flag with Simulator hypervisor does not
auto-execute migrations. Manual migration validates DRS recommendations are
correct.
---
### TC3: Condensed Algorithm Verification
**Result: PASS - Condensed algorithm correctly consolidates VMs onto fewer
hosts**
**Step 1:** Change algorithm to condensed
<details>
<summary>echo "update configuration name=drs.algorithm value=condensed
clusterid=2fbbf922-f557-4e23-99c1-e4df3be7210c" | cmk</summary>
```json
{
"configuration": {
"category": "Advanced",
"component": "ClusterDrsService",
"defaultvalue": "balanced",
"description": "The DRS algorithm to be executed on the cluster.
Possible values are condensed, balanced.",
"displaytext": "DRS algorithm",
"group": "Miscellaneous",
"isdynamic": true,
"name": "drs.algorithm",
"options": "condensed,balanced",
"scope": "cluster",
"subgroup": "DRS",
"type": "Select",
"value": "condensed"
}
}
```
</details>
**Step 2:** Generate DRS plan with condensed algorithm
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=5" | cmk [41.526s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "80aab3c9-f0ea-4132-83fa-121570ed02cb",
"id": "39dd199a-2f11-4cae-80b3-64087426cab2",
"migrations": [
{
"destinationhostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"sourcehostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"virtualmachinename": "i-2-41-QA"
},
{
"destinationhostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"sourcehostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"virtualmachinename": "i-2-108-QA"
},
{
"destinationhostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"sourcehostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"virtualmachinename": "i-2-109-QA"
},
{
"destinationhostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"sourcehostid": "d875cf86-984d-42c3-87f2-1d94cf76309e",
"virtualmachinename": "i-2-64-QA"
},
{
"destinationhostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"sourcehostid": "d875cf86-984d-42c3-87f2-1d94cf76309e",
"virtualmachinename": "i-2-75-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
**Algorithm Behavior Comparison:**
| Algorithm | Source Host | Destination Host | Behavior |
|-----------|-------------|------------------|----------|
| Balanced | Most loaded hosts | Least loaded host (fca5a008) | Spreads VMs |
| Condensed | Least loaded host (fca5a008) | More loaded hosts |
Consolidates VMs |
---
### TC4: Affinity Rules Compliance
**Result: PASS - Anti-affinity constraints respected in DRS plans**
**Step 1:** Create anti-affinity group
<details>
<summary>echo "create affinitygroup name=drs-test-antiaffinity type='host
anti-affinity'" | cmk</summary>
```json
{
"affinitygroup": {
"account": "admin",
"domain": "ROOT",
"domainid": "c5e52334-bfee-11f0-8d7e-1e006500046d",
"domainpath": "/",
"id": "28cc27d7-cf55-41fc-b365-27ac524a9ee9",
"name": "drs-test-antiaffinity",
"type": "host anti-affinity"
}
}
```
</details>
**Step 2:** Add VMs to anti-affinity group
<details>
<summary>echo "update vmaffinitygroup
id=e3d4e44c-d087-4b40-b9e3-d97a80a134af
affinitygroupids=28cc27d7-cf55-41fc-b365-27ac524a9ee9" | cmk</summary>
```json
{
"virtualmachine": {
"account": "admin",
"affinitygroup": [
{
"account": "admin",
"id": "28cc27d7-cf55-41fc-b365-27ac524a9ee9",
"name": "drs-test-antiaffinity"
}
],
"displayname": "drs-test-vm-2",
"id": "e3d4e44c-d087-4b40-b9e3-d97a80a134af",
"name": "drs-test-vm-2",
"state": "Stopped"
}
}
```
</details>
<details>
<summary>echo "update vmaffinitygroup
id=948b0e57-0bcd-4469-b042-837c973232ae
affinitygroupids=28cc27d7-cf55-41fc-b365-27ac524a9ee9" | cmk</summary>
```json
{
"virtualmachine": {
"account": "admin",
"affinitygroup": [
{
"account": "admin",
"id": "28cc27d7-cf55-41fc-b365-27ac524a9ee9",
"name": "drs-test-antiaffinity"
}
],
"displayname": "drs-test-vm-4",
"id": "948b0e57-0bcd-4469-b042-837c973232ae",
"name": "drs-test-vm-4",
"state": "Stopped"
}
}
```
</details>
**Step 3:** Verify VMs on different hosts after restart
<details>
<summary>echo "list virtualmachines id=e3d4e44c-d087-4b40-b9e3-d97a80a134af
filter=id,name,hostid,hostname" | cmk</summary>
```json
{
"count": 1,
"virtualmachine": [
{
"hostid": "94122a66-6930-4e14-8941-5da14de64069",
"hostname": "SimulatedAgent.5d146d20-8041-4bf7-81a7-3e0987e3f0f1",
"id": "e3d4e44c-d087-4b40-b9e3-d97a80a134af",
"name": "drs-test-vm-2"
}
]
}
```
</details>
<details>
<summary>echo "list virtualmachines id=948b0e57-0bcd-4469-b042-837c973232ae
filter=id,name,hostid,hostname" | cmk</summary>
```json
{
"count": 1,
"virtualmachine": [
{
"hostid": "2e236e86-60bd-412f-86a9-b7ad97e5817d",
"hostname": "SimulatedAgent.d9407f91-48c3-436a-bb37-39afc5dc6da6",
"id": "948b0e57-0bcd-4469-b042-837c973232ae",
"name": "drs-test-vm-4"
}
]
}
```
</details>
VMs confirmed on different hosts (anti-affinity enforced at startup).
**Step 4:** Generate DRS plan - verify anti-affinity VMs not moved together
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=10" | cmk [41.437s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "74ef9885-7b6d-47c9-b395-6562f77af001",
"id": "9eeee535-f45e-4818-9481-9f19c6ff1a18",
"migrations": [
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-11-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "8d47e97d-6ffa-4aac-a146-23976f997365",
"virtualmachinename": "i-2-24-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "5e336605-f5c6-47b9-a847-06a53a7ae696",
"virtualmachinename": "i-2-43-QA"
},
{
"destinationhostid": "d875cf86-984d-42c3-87f2-1d94cf76309e",
"sourcehostid": "c27ffc96-fb4f-4e74-a79c-a4e8748f4cff",
"virtualmachinename": "i-2-19-QA"
},
{
"destinationhostid": "67efe13d-abb1-4493-9ec5-52c970186c99",
"sourcehostid": "29dc9af0-9d13-47b4-9a7d-c467d851ac49",
"virtualmachinename": "i-2-4-QA"
},
{
"destinationhostid": "fca5a008-952f-4ca5-8a60-2213cfde4b5a",
"sourcehostid": "87d290dd-fc82-497f-9e95-497a537dad5a",
"virtualmachinename": "i-2-10-QA"
}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
**Observation:** Neither drs-test-vm-2 nor drs-test-vm-4 appear in migration
plan - anti-affinity constraint respected.
---
### TC5: Scale and Consistency Testing
**Result: PASS - Consistent performance across repeated runs**
**Test 1:** High migration limit (migrations=50)
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=50" | cmk [44.624s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "cdb9dc74-6047-4754-b911-9b3342a2cb96",
"id": "f56e02e7-455b-4dc2-88df-3e5cc2c29e5c",
"migrations": [
{"virtualmachinename": "i-2-11-QA", "destinationhostid":
"fca5a008-952f-4ca5-8a60-2213cfde4b5a"},
{"virtualmachinename": "i-2-24-QA", "destinationhostid":
"fca5a008-952f-4ca5-8a60-2213cfde4b5a"},
{"virtualmachinename": "i-2-43-QA", "destinationhostid":
"fca5a008-952f-4ca5-8a60-2213cfde4b5a"},
{"virtualmachinename": "i-2-19-QA", "destinationhostid":
"67efe13d-abb1-4493-9ec5-52c970186c99"},
{"virtualmachinename": "i-2-4-QA", "destinationhostid":
"d875cf86-984d-42c3-87f2-1d94cf76309e"},
{"virtualmachinename": "i-2-10-QA", "destinationhostid":
"fca5a008-952f-4ca5-8a60-2213cfde4b5a"}
],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
Result: 6 migrations returned (DRS limits to actual need regardless of
requested count)
**Test 2:** Repeated execution (10 runs)
<details>
<summary>for i in {1..5}; do echo "=== Run $i ==="; time echo "generate
clusterdrsplan ..." | cmk > /dev/null; done</summary>
```
=== Run 1 ===
real 0m45.592s
=== Run 2 ===
real 0m45.816s
=== Run 3 ===
real 0m41.616s
=== Run 4 ===
real 0m41.555s
=== Run 5 ===
real 0m44.450s
```
</details>
<details>
<summary>for i in {1..5}; do echo "=== Run $i ==="; time cmk <<< "generate
clusterdrsplan ..." >/dev/null; done</summary>
```
=== Run 1 ===
real 0m43.672s
=== Run 2 ===
real 0m43.546s
=== Run 3 ===
real 0m45.504s
=== Run 4 ===
real 0m42.770s
=== Run 5 ===
real 0m43.415s
```
</details>
**Average: ~43.7s, Variance: +/-2s** - No performance degradation observed.
---
### TC6: Edge Case Handling
**Result: PASS - Proper error handling for all edge cases**
| Test | Input | Expected | Result |
|------|-------|----------|--------|
| Zero migrations | migrations=0 | Error | PASS |
| Invalid cluster | id=invalid-cluster-id | Error | PASS |
| Balanced cluster | drs.imbalance=0.1 | Empty plan | PASS |
<details>
<summary>time echo "generate clusterdrsplan
id=2fbbf922-f557-4e23-99c1-e4df3be7210c migrations=0" | cmk [0.101s]</summary>
```
Error: (HTTP 431, error code 4350) Unable to execute DRS on the cluster C0
as the number of migrations [0] is invalid
```
</details>
<details>
<summary>echo "generate clusterdrsplan id=invalid-cluster-id migrations=5" |
cmk</summary>
```
Error: (HTTP 431, error code 9999) Unable to execute API command
generateclusterdrsplan due to invalid value. Invalid parameter id
value=invalid-cluster-id due to incorrect long value format, or entity does not
exist or due to incorrect parameter annotation for the field in api cmd class.
```
</details>
<details>
<summary>time echo "generate clusterdrsplan ..." | cmk [with
drs.imbalance=0.1, 14.1s]</summary>
```json
{
"generateclusterdrsplanresponse": {
"clusterid": "2fbbf922-f557-4e23-99c1-e4df3be7210c",
"eventid": "2de00c31-4730-4de2-96d5-9771bf4159f8",
"id": "f345b3c3-ae4b-46c1-ad7b-bf887d0feb90",
"migrations": [],
"status": "UNDER_REVIEW",
"type": "MANUAL"
}
}
```
</details>
---
### TC7: Regression Testing
**Result: PASS - Both environments generate identical migration plans**
Plan comparison from TC1 shows both WITH and WITHOUT PR environments
selected the same VMs for migration:
- i-2-41-QA, i-2-11-QA, i-2-24-QA, i-2-43-QA, i-2-19-QA
Only difference: execution time (150s vs 42s).
**Note:** Direct comparison was performed during TC1 before schema upgrade.
Subsequent tests used only the WITH PR environment since both servers shared
the same database.
---
### Conclusion
All 7 test cases passed. The PR delivers significant performance improvement
(3.6x faster) while maintaining functional correctness across both algorithms,
affinity rules, and edge cases.
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