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[DC-1780] Add clustering and mixed insert/update mode (#27)
This PR adds the following functionality: - Specify number of distinct cluster values to test clustered collections via `NUM_CLUSTERS` - Specify percentage of documents hitting a specific cluster to simulate hot clustering via `HOT_CLUSTER_PERCENTAGE` - Add a mode that mixes inserts and updates randomly via `mixed` mode, `UPDATE_PERCENTAGE`, and `MAX_DOCS` Mixed mode only works well if there's one kubernetes replica doing the work. The max doc id, n, is tracked locally so that any docs with doc id 0 to n will be updates and n+1 will be an insert. The alternative that would work for multiple replicas is to use a uuid on inserts and for updates choose from 0 to n. This means the collection would need to be populated with docs from 0 to n first, and any newly inserted docs with uuids would never be updated.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -10,6 +10,17 @@ import ( | |
| guuid "github.com/google/uuid" | ||
| ) | ||
|
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| type DocumentSpec struct { | ||
| Destination string | ||
| GeneratorIdentifier string | ||
| BatchSize int | ||
| Mode string | ||
| IdMode string | ||
| UpdatePercentage int | ||
| NumClusters int | ||
| HotClusterPercentage int | ||
| } | ||
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| type DocStruct struct { | ||
| Guid string | ||
| IsActive bool | ||
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@@ -59,8 +70,9 @@ type FriendDetailsStruct struct { | |
| } | ||
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| var doc_id = 0 | ||
| var max_doc_id = 0 | ||
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| func GenerateDoc(destination, identifier string, idMode string) (interface{}, error) { | ||
| func GenerateDoc(spec DocumentSpec) (interface{}, error) { | ||
| docStruct := DocStruct{} | ||
| err := faker.FakeData(&docStruct) | ||
| if err != nil { | ||
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@@ -74,43 +86,69 @@ func GenerateDoc(destination, identifier string, idMode string) (interface{}, er | |
| return nil, fmt.Errorf("failed to unmarshal document: %w", err) | ||
| } | ||
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| if destination == "rockset" { | ||
| if idMode == "uuid" { | ||
| if spec.Destination == "rockset" { | ||
| if spec.Mode == "mixed" { | ||
| // Randomly choose a number to decide whether to generate a doc with an existing doc id | ||
| if rand.Intn(100) < spec.UpdatePercentage { | ||
| // Choose random id from one already existing doc id | ||
| doc["_id"] = formatDocId(rand.Intn(getMaxDoc())) | ||
| } else { | ||
| doc["_id"] = formatDocId(getMaxDoc()) | ||
| SetMaxDoc(getMaxDoc()+1) | ||
| } | ||
| doc_id = doc_id + 1 | ||
| // All other modes | ||
| } else if spec.IdMode == "uuid" { | ||
| doc["_id"] = guuid.New().String() | ||
| } else { | ||
| } else if spec.IdMode == "sequential"{ | ||
| doc["_id"] = formatDocId(doc_id) | ||
| doc_id = doc_id + 1 | ||
| } else { | ||
| panic(fmt.Sprintf("Unsupported generateDoc case: %s", spec.IdMode)) | ||
| } | ||
| } | ||
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| if spec.NumClusters > 0 { | ||
| doc["cluster1"] = getClusterKey(spec.NumClusters, spec.HotClusterPercentage) | ||
| } | ||
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| doc["_event_time"] = CurrentTimeMicros() | ||
| // Set _ts as _event_time is not mutable | ||
| doc["_ts"] = CurrentTimeMicros() | ||
| doc["generator_identifier"] = identifier | ||
| doc["generator_identifier"] = spec.GeneratorIdentifier | ||
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| return doc, nil | ||
| } | ||
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| func getClusterKey(numClusters int, hotClusterPercentage int) string { | ||
| if hotClusterPercentage > 0 && rand.Intn(100) < hotClusterPercentage { | ||
| return "[email protected]" | ||
| } else { | ||
| return fmt.Sprintf("%[email protected]", rand.Intn(numClusters)) | ||
| } | ||
| } | ||
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| func getMaxDoc() int { | ||
| // doc_ids are left padded monotonic integers, | ||
| //this returns the highest exclusive doc id for purposes of issuing patches. | ||
| return doc_id | ||
| return max_doc_id | ||
| } | ||
|
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| func SetMaxDoc(maxDocId int) { | ||
| doc_id = maxDocId | ||
| // doc_id = maxDocId | ||
| max_doc_id = maxDocId | ||
| } | ||
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| func CurrentTimeMicros() int64 { | ||
| t := time.Now() | ||
| return int64(time.Nanosecond) * t.UnixNano() / int64(time.Microsecond) | ||
| } | ||
|
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| func GenerateDocs(batchSize int, destination, identifier string, idMode string) ([]interface{}, error) { | ||
| var docs = make([]interface{}, batchSize, batchSize) | ||
| func GenerateDocs(spec DocumentSpec) ([]interface{}, error) { | ||
| var docs = make([]interface{}, spec.BatchSize, spec.BatchSize) | ||
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| for i := 0; i < batchSize; i++ { | ||
| doc, err := GenerateDoc(destination, identifier, idMode) | ||
| for i := 0; i < spec.BatchSize; i++ { | ||
| doc, err := GenerateDoc(spec) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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@@ -262,7 +300,7 @@ func genUniqueInRange(limit int, count int) []int { | |
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| ids := make([]int, count) | ||
| i := 0 | ||
| for k, _ := range ids_to_patch { | ||
| for k := range ids_to_patch { | ||
| ids[i] = k | ||
| i++ | ||
| } | ||
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