diff --git a/@overflow/discovery/component/discovery/animation.ts b/@overflow/discovery/component/animation.ts
similarity index 100%
rename from @overflow/discovery/component/discovery/animation.ts
rename to @overflow/discovery/component/animation.ts
diff --git a/@overflow/discovery/component/discovery/discovery.component.html b/@overflow/discovery/component/discovery.component.html
similarity index 100%
rename from @overflow/discovery/component/discovery/discovery.component.html
rename to @overflow/discovery/component/discovery.component.html
diff --git a/@overflow/discovery/component/discovery.component.ts b/@overflow/discovery/component/discovery.component.ts
new file mode 100644
index 0000000..0ab96a3
--- /dev/null
+++ b/@overflow/discovery/component/discovery.component.ts
@@ -0,0 +1,88 @@
+import {
+  Component, Input, Output, EventEmitter,
+} from '@angular/core';
+import { Probe, ProbeHost } from '@overflow/commons-typescript/model/probe';
+import { Anim } from './animation';
+import { Store, select } from '@ngrx/store';
+import { Observable, of, Subscription } from 'rxjs';
+import { DiscoveryService } from '../service/discovery.service';
+import { DiscoveryNotify } from '../core/discovery-subject';
+import { catchError, exhaustMap, map, tap } from 'rxjs/operators';
+import { DiscoverZone, Zone, Host, Port, Service } from '@overflow/commons-typescript/model/discovery';
+
+@Component({
+  selector: 'of-discovery',
+  templateUrl: './discovery.component.html',
+  animations: Anim
+})
+export class DiscoveryComponent  {
+
+  @Input() probeHostID;
+  pending$: Observable<boolean>;
+  error$: Observable<any>;
+  discoverySubscription: Subscription;
+
+  selectedProbe: ProbeHost;
+  requested: boolean;
+
+
+  constructor(
+    private discoveryService: DiscoveryService,
+    private store: Store<any>
+  ) {
+  }
+
+  onRequestDiscovery(dz: DiscoverZone) {
+    this.requested = true;
+
+    this.requested = true;
+
+    this.discoverySubscription = this.discoveryService.discoverZone(this.selectedProbe.probe.probeKey, dz).pipe(
+      map((discoveryNotify: DiscoveryNotify) => {
+        switch (discoveryNotify.method) {
+          case 'DiscoveryService.discoveryStart': {
+            const startDate = discoveryNotify.params as Date;
+            break;
+          }
+          case 'DiscoveryService.discoveryStop': {
+            const stopDate = discoveryNotify.params as Date;
+
+            this.discoverySubscription.unsubscribe();
+            break;
+          }
+          case 'DiscoveryService.discoveredZone': {
+            const zone = discoveryNotify.params as Zone;
+
+            break;
+          }
+          case 'DiscoveryService.discoveredHost': {
+            const host = discoveryNotify.params as Host;
+
+            break;
+          }
+          case 'DiscoveryService.discoveredPort': {
+            const port = discoveryNotify.params as Port;
+
+            break;
+          }
+          case 'DiscoveryService.discoveredService': {
+            const service = discoveryNotify.params as Service;
+
+            break;
+          }
+          default: {
+            break;
+          }
+        }
+      }),
+      catchError(error => {
+
+        return of();
+      }),
+    ).subscribe();
+  }
+
+  onRequestDiscoveryStop() {
+    this.requested = false;
+  }
+}
diff --git a/@overflow/discovery/component/discovery/discovery.component.ts b/@overflow/discovery/component/discovery/discovery.component.ts
deleted file mode 100644
index 2118120..0000000
--- a/@overflow/discovery/component/discovery/discovery.component.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import {
-  Component, Input, Output, EventEmitter,
-} from '@angular/core';
-import { Probe, ProbeHost } from '@overflow/commons-typescript/model/probe';
-import { DiscoverZone } from '@overflow/commons-typescript/model/discovery';
-import { Anim } from './animation';
-
-@Component({
-  selector: 'of-discovery',
-  templateUrl: './discovery.component.html',
-  animations: Anim
-})
-export class DiscoveryComponent  {
-
-  @Input() probeHostID;
-  selectedProbe: ProbeHost;
-  // @Output() requestDiscovery = new EventEmitter<DiscoverZone>();
-  // @Output() requestStop = new EventEmitter();
-
-  discoverZone: DiscoverZone;
-  requested: boolean;
-
-  constructor(
-  ) {
-  }
-
-  onRequestDiscovery(dz: DiscoverZone) {
-    this.requested = true;
-    this.discoverZone = dz;
-    // this.requestDiscovery.emit(dz);
-  }
-
-  onRequestDiscoveryStop() {
-    this.requested = false;
-    this.discoverZone = null;
-    // this.requestStop.emit();
-  }
-}
diff --git a/@overflow/discovery/component/discovery/service-selector/service-selector.component.html b/@overflow/discovery/component/discovery/service-selector/service-selector.component.html
index cee3283..6298863 100644
--- a/@overflow/discovery/component/discovery/service-selector/service-selector.component.html
+++ b/@overflow/discovery/component/discovery/service-selector/service-selector.component.html
@@ -1,22 +1,3 @@
-<div class="ui-g-12">
-  <p-pickList
-      [disabled]="disabled"
-      [source]="metaCrawlers$ | async"
-      [target]="includeServices"
-      sourceHeader="Available"
-      targetHeader="Selected"
-      [responsive]="true"
-      filterBy="description"
-      dragdrop="true"
-      dragdropScope="services"
-      [sourceStyle]="{'height':'200px'}"
-      [targetStyle]="{'height':'200px'}"
-      [showTargetControls]="false"
-      [showSourceControls]="false" >
-    <ng-template let-crawler pTemplate="item">
-      <div class="ui-helper-clearfix">
-        <div style="font-size:14px;margin:0;padding: 0;">{{crawler.description}}</div>
-      </div>
-    </ng-template>
-  </p-pickList>
-</div>
+<p-listbox [options]="metaCrawlers$ | async" [(ngModel)]="selected" multiple="multiple" checkbox="checkbox" filter="filter" optionLabel="description"
+  metaKeySelection="true" (onChange)="onChange($event)" [style]="{'width':'100%'}" [listStyle]="{'max-height':'250px'}">
+</p-listbox>
diff --git a/@overflow/discovery/component/discovery/service-selector/service-selector.component.ts b/@overflow/discovery/component/discovery/service-selector/service-selector.component.ts
index 254ce4b..516457b 100644
--- a/@overflow/discovery/component/discovery/service-selector/service-selector.component.ts
+++ b/@overflow/discovery/component/discovery/service-selector/service-selector.component.ts
@@ -29,6 +29,8 @@ export class ServiceSelectorComponent implements OnInit, AfterContentInit, OnDes
   pending$: Observable<boolean>;
   error$: Observable<any>;
 
+  selected = [];
+
   constructor(
     protected store: Store<any>,
     protected metaCrawlerService: MetaCrawlerService,
@@ -63,4 +65,9 @@ export class ServiceSelectorComponent implements OnInit, AfterContentInit, OnDes
     // this.listStore.dispatch(new ListStore.ReadAll());
   }
 
+  onChange(e) {
+    this.selected.push(e.value);
+    console.log(e);
+  }
+
 }
diff --git a/@overflow/discovery/component/index.ts b/@overflow/discovery/component/index.ts
index b5003e3..f283699 100644
--- a/@overflow/discovery/component/index.ts
+++ b/@overflow/discovery/component/index.ts
@@ -1,10 +1,10 @@
 import { ServiceSelectorComponent } from './discovery/service-selector/service-selector.component';
-import { DiscoveryComponent } from './discovery/discovery.component';
-import { SearchConfigComponent } from './discovery/search-config.component';
-import { SearchFilterComponent } from './discovery/search-filter.component';
-import { SearchResultComponent } from './discovery/search-result.component';
-import { IpInputComponent } from './discovery/ip-input.component';
-import { RequestSummaryComponent } from './discovery/request-summary.component';
+import { DiscoveryComponent } from './discovery.component';
+import { SearchConfigComponent } from './search-config.component';
+import { SearchFilterComponent } from './search-filter.component';
+import { SearchResultComponent } from './search-result.component';
+import { IpInputComponent } from './ip-input.component';
+import { RequestSummaryComponent } from './request-summary.component';
 
 export const COMPONENTS = [
   ServiceSelectorComponent,
diff --git a/@overflow/discovery/component/discovery/ip-input.component.html b/@overflow/discovery/component/ip-input.component.html
similarity index 100%
rename from @overflow/discovery/component/discovery/ip-input.component.html
rename to @overflow/discovery/component/ip-input.component.html
diff --git a/@overflow/discovery/component/discovery/ip-input.component.ts b/@overflow/discovery/component/ip-input.component.ts
similarity index 100%
rename from @overflow/discovery/component/discovery/ip-input.component.ts
rename to @overflow/discovery/component/ip-input.component.ts
diff --git a/@overflow/discovery/component/discovery/request-summary.component.html b/@overflow/discovery/component/request-summary.component.html
similarity index 100%
rename from @overflow/discovery/component/discovery/request-summary.component.html
rename to @overflow/discovery/component/request-summary.component.html
diff --git a/@overflow/discovery/component/discovery/request-summary.component.ts b/@overflow/discovery/component/request-summary.component.ts
similarity index 100%
rename from @overflow/discovery/component/discovery/request-summary.component.ts
rename to @overflow/discovery/component/request-summary.component.ts
diff --git a/@overflow/discovery/component/discovery/search-config.component.html b/@overflow/discovery/component/search-config.component.html
similarity index 100%
rename from @overflow/discovery/component/discovery/search-config.component.html
rename to @overflow/discovery/component/search-config.component.html
diff --git a/@overflow/discovery/component/discovery/search-config.component.ts b/@overflow/discovery/component/search-config.component.ts
similarity index 100%
rename from @overflow/discovery/component/discovery/search-config.component.ts
rename to @overflow/discovery/component/search-config.component.ts
diff --git a/@overflow/discovery/component/discovery/search-filter.component.html b/@overflow/discovery/component/search-filter.component.html
similarity index 100%
rename from @overflow/discovery/component/discovery/search-filter.component.html
rename to @overflow/discovery/component/search-filter.component.html
diff --git a/@overflow/discovery/component/discovery/search-filter.component.ts b/@overflow/discovery/component/search-filter.component.ts
similarity index 100%
rename from @overflow/discovery/component/discovery/search-filter.component.ts
rename to @overflow/discovery/component/search-filter.component.ts
diff --git a/@overflow/discovery/component/discovery/search-result.component.html b/@overflow/discovery/component/search-result.component.html
similarity index 100%
rename from @overflow/discovery/component/discovery/search-result.component.html
rename to @overflow/discovery/component/search-result.component.html
diff --git a/@overflow/discovery/component/discovery/search-result.component.ts b/@overflow/discovery/component/search-result.component.ts
similarity index 100%
rename from @overflow/discovery/component/discovery/search-result.component.ts
rename to @overflow/discovery/component/search-result.component.ts
diff --git a/@overflow/discovery/service/discovery.service.ts b/@overflow/discovery/service/discovery.service.ts
index 8699116..a9e682b 100644
--- a/@overflow/discovery/service/discovery.service.ts
+++ b/@overflow/discovery/service/discovery.service.ts
@@ -2,7 +2,6 @@ import { Injectable } from '@angular/core';
 import { Observable } from 'rxjs/Observable';
 import { RPCService } from '@loafer/ng-rpc';
 import {
-  DiscoveryStartInfo,
   DiscoverZone as MDDiscoverZone,
   DiscoverHost as MDDiscoverHost,
   DiscoverPort as MDDiscoverPort,
@@ -22,11 +21,6 @@ export class DiscoveryService {
 
   }
 
-  public start(dsInfo: DiscoveryStartInfo): Observable<DiscoveryStartInfo> {
-
-    return this.rpcService.call('DiscoveryService.startDiscovery', dsInfo);
-  }
-
   public discoverZone(probeID: string, discoverZone: MDDiscoverZone): void {
     this.rpcService.send('DiscoveryService.discoverZone', probeID, discoverZone);
   }
diff --git a/@overflow/discovery/store/setting/setting.effect.ts b/@overflow/discovery/store/setting/setting.effect.ts
index 5d19efe..ee49794 100644
--- a/@overflow/discovery/store/setting/setting.effect.ts
+++ b/@overflow/discovery/store/setting/setting.effect.ts
@@ -35,17 +35,17 @@ export class Effects {
     private router: Router
   ) { }
 
-  @Effect()
-  startDiscovery$: Observable<Action> = this.actions$
-  .ofType(ActionType.Setting)
-  .map((action: Setting) => action.payload)
-  .switchMap(payload => this.discoveryService.start(payload))
-  .map(discoveryStartInfo => {
-    return new SettingSuccess(discoveryStartInfo);
-  })
-  .catch((error: RPCClientError) => {
-    console.log(error.response.message);
-    return of(new SettingFailure(error));
-  });
+  // @Effect()
+  // startDiscovery$: Observable<Action> = this.actions$
+  // .ofType(ActionType.Setting)
+  // .map((action: Setting) => action.payload)
+  // .switchMap(payload => this.discoveryService.start(payload))
+  // .map(discoveryStartInfo => {
+  //   return new SettingSuccess(discoveryStartInfo);
+  // })
+  // .catch((error: RPCClientError) => {
+  //   console.log(error.response.message);
+  //   return of(new SettingFailure(error));
+  // });
 
 }
diff --git a/@overflow/meta/service/meta-crawler.service.ts b/@overflow/meta/service/meta-crawler.service.ts
index f7bc6ec..bc248d4 100644
--- a/@overflow/meta/service/meta-crawler.service.ts
+++ b/@overflow/meta/service/meta-crawler.service.ts
@@ -20,7 +20,7 @@ export class MetaCrawlerService {
       this.metaCrawlerCache$ = this.rpcService.call('MetaCrawlerService.readAll').pipe(
         shareReplay<MetaCrawler[]>(1),
       );
-    }
+  }
 
     return this.metaCrawlerCache$;
   }