diff --git a/extern/sector-storage/sched.go b/extern/sector-storage/sched.go
index d7d7d3265..757e89299 100644
--- a/extern/sector-storage/sched.go
+++ b/extern/sector-storage/sched.go
@@ -76,6 +76,10 @@ type scheduler struct {
 type workerHandle struct {
 	workerRpc Worker
 
+	tasksCache  map[sealtasks.TaskType]struct{}
+	tasksUpdate time.Time
+	tasksLk     sync.Mutex
+
 	info storiface.WorkerInfo
 
 	preparing *activeResources // use with workerHandle.lk
diff --git a/extern/sector-storage/sched_resources.go b/extern/sector-storage/sched_resources.go
index 5f7f1cfb8..6034dc2e9 100644
--- a/extern/sector-storage/sched_resources.go
+++ b/extern/sector-storage/sched_resources.go
@@ -1,8 +1,11 @@
 package sectorstorage
 
 import (
+	"context"
 	"sync"
+	"time"
 
+	"github.com/filecoin-project/lotus/extern/sector-storage/sealtasks"
 	"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
 )
 
@@ -142,3 +145,20 @@ func (wh *workerHandle) utilization() float64 {
 
 	return u
 }
+
+var tasksCacheTimeout = 30 * time.Second
+
+func (wh *workerHandle) TaskTypes(ctx context.Context) (t map[sealtasks.TaskType]struct{}, err error) {
+	wh.lk.Lock()
+	defer wh.lk.Unlock()
+
+	if wh.tasksCache == nil || time.Now().Sub(wh.tasksUpdate) > tasksCacheTimeout {
+		wh.tasksCache, err = wh.workerRpc.TaskTypes(ctx)
+		if err != nil {
+			return nil, err
+		}
+		wh.tasksUpdate = time.Now()
+	}
+
+	return wh.tasksCache, nil
+}
diff --git a/extern/sector-storage/selector_alloc.go b/extern/sector-storage/selector_alloc.go
index 3212161af..fe6a11e1e 100644
--- a/extern/sector-storage/selector_alloc.go
+++ b/extern/sector-storage/selector_alloc.go
@@ -27,7 +27,7 @@ func newAllocSelector(index stores.SectorIndex, alloc storiface.SectorFileType,
 }
 
 func (s *allocSelector) Ok(ctx context.Context, task sealtasks.TaskType, spt abi.RegisteredSealProof, whnd *workerHandle) (bool, error) {
-	tasks, err := whnd.workerRpc.TaskTypes(ctx)
+	tasks, err := whnd.TaskTypes(ctx)
 	if err != nil {
 		return false, xerrors.Errorf("getting supported worker task types: %w", err)
 	}
diff --git a/extern/sector-storage/selector_existing.go b/extern/sector-storage/selector_existing.go
index 4c0ba379c..b84991b5c 100644
--- a/extern/sector-storage/selector_existing.go
+++ b/extern/sector-storage/selector_existing.go
@@ -29,7 +29,7 @@ func newExistingSelector(index stores.SectorIndex, sector abi.SectorID, alloc st
 }
 
 func (s *existingSelector) Ok(ctx context.Context, task sealtasks.TaskType, spt abi.RegisteredSealProof, whnd *workerHandle) (bool, error) {
-	tasks, err := whnd.workerRpc.TaskTypes(ctx)
+	tasks, err := whnd.TaskTypes(ctx)
 	if err != nil {
 		return false, xerrors.Errorf("getting supported worker task types: %w", err)
 	}
diff --git a/extern/sector-storage/selector_task.go b/extern/sector-storage/selector_task.go
index 15c71b648..94bcb4419 100644
--- a/extern/sector-storage/selector_task.go
+++ b/extern/sector-storage/selector_task.go
@@ -20,7 +20,7 @@ func newTaskSelector() *taskSelector {
 }
 
 func (s *taskSelector) Ok(ctx context.Context, task sealtasks.TaskType, spt abi.RegisteredSealProof, whnd *workerHandle) (bool, error) {
-	tasks, err := whnd.workerRpc.TaskTypes(ctx)
+	tasks, err := whnd.TaskTypes(ctx)
 	if err != nil {
 		return false, xerrors.Errorf("getting supported worker task types: %w", err)
 	}
@@ -30,11 +30,12 @@ func (s *taskSelector) Ok(ctx context.Context, task sealtasks.TaskType, spt abi.
 }
 
 func (s *taskSelector) Cmp(ctx context.Context, _ sealtasks.TaskType, a, b *workerHandle) (bool, error) {
-	atasks, err := a.workerRpc.TaskTypes(ctx)
+	atasks, err := a.TaskTypes(ctx)
 	if err != nil {
 		return false, xerrors.Errorf("getting supported worker task types: %w", err)
 	}
-	btasks, err := b.workerRpc.TaskTypes(ctx)
+
+	btasks, err := b.TaskTypes(ctx)
 	if err != nil {
 		return false, xerrors.Errorf("getting supported worker task types: %w", err)
 	}