diff --git a/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt b/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt
index ae4cfb00..fcef9df5 100644
--- a/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt
+++ b/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt
@@ -57,7 +57,7 @@ fun connectStorage(device: Device, config: Meta) {
 }
 
 fun readResourceMeta(path: String): Meta {
-    val resource = Global.io.optResource(path).nullable
+    val resource = Global.output.optResource(path).nullable
     if (resource != null) {
         return XMLMetaReader().read(resource.stream)
     } else {
diff --git a/numass-core/src/main/kotlin/inr/numass/data/NumassDataUtils.kt b/numass-core/src/main/kotlin/inr/numass/data/NumassDataUtils.kt
index 0d7dbb3c..f49dd92f 100644
--- a/numass-core/src/main/kotlin/inr/numass/data/NumassDataUtils.kt
+++ b/numass-core/src/main/kotlin/inr/numass/data/NumassDataUtils.kt
@@ -86,34 +86,34 @@ val NumassBlock.channel: Int
     }
 
 
-fun NumassBlock.transformChain(transform: (NumassEvent, NumassEvent) -> Pair<Short, Long>?): NumassBlock {
-    return SimpleBlock(this.startTime, this.length) { owner ->
+suspend fun NumassBlock.transformChain(transform: (NumassEvent, NumassEvent) -> Pair<Short, Long>?): NumassBlock {
+    return SimpleBlock.produce(this.startTime, this.length) {
         this.events.asSequence()
                 .sortedBy { it.timeOffset }
                 .zipWithNext(transform)
                 .filterNotNull()
-                .map { NumassEvent(it.first, it.second, owner) }.asIterable()
+                .map { OrphanNumassEvent(it.first, it.second) }.asIterable()
     }
 }
 
-fun NumassBlock.filterChain(condition: (NumassEvent, NumassEvent) -> Boolean): NumassBlock {
-    return SimpleBlock(this.startTime, this.length) { owner ->
+suspend fun NumassBlock.filterChain(condition: (NumassEvent, NumassEvent) -> Boolean): NumassBlock {
+    return SimpleBlock.produce(this.startTime, this.length) {
         this.events.asSequence()
                 .sortedBy { it.timeOffset }
                 .zipWithNext().filter { condition.invoke(it.first, it.second) }.map { it.second }.asIterable()
     }
 }
 
-fun NumassBlock.filter(condition: (NumassEvent) -> Boolean): NumassBlock {
-    return SimpleBlock(this.startTime, this.length) { owner ->
+suspend fun NumassBlock.filter(condition: (NumassEvent) -> Boolean): NumassBlock {
+    return SimpleBlock.produce(this.startTime, this.length) {
         this.events.asSequence().filter(condition).asIterable()
     }
 }
 
-fun NumassBlock.transform(transform: (NumassEvent) -> OrphanNumassEvent): NumassBlock {
-    return SimpleBlock(this.startTime, this.length) { owner ->
+suspend fun NumassBlock.transform(transform: (NumassEvent) -> OrphanNumassEvent): NumassBlock {
+    return SimpleBlock.produce(this.startTime, this.length) {
         this.events.asSequence()
-                .map { transform(it).adopt(owner) }
+                .map { transform(it) }
                 .asIterable()
     }
 }
\ No newline at end of file
diff --git a/numass-core/src/main/kotlin/inr/numass/data/api/NumassBlock.kt b/numass-core/src/main/kotlin/inr/numass/data/api/NumassBlock.kt
index c004642f..ac0afcce 100644
--- a/numass-core/src/main/kotlin/inr/numass/data/api/NumassBlock.kt
+++ b/numass-core/src/main/kotlin/inr/numass/data/api/NumassBlock.kt
@@ -1,7 +1,6 @@
 package inr.numass.data.api
 
 import inr.numass.data.channel
-import kotlinx.coroutines.experimental.runBlocking
 import java.io.Serializable
 import java.time.Duration
 import java.time.Instant
@@ -76,13 +75,20 @@ fun OrphanNumassEvent.adopt(parent: NumassBlock): NumassEvent {
 class SimpleBlock(
         override val startTime: Instant,
         override val length: Duration,
-        producer: suspend (NumassBlock) -> Iterable<NumassEvent>) : NumassBlock, Serializable {
+        rawEvents: Iterable<OrphanNumassEvent>
+) : NumassBlock, Serializable {
 
-    private val eventList = runBlocking { producer(this@SimpleBlock).toList() }
+    private val eventList by lazy { rawEvents.map { it.adopt(this) } }
 
     override val frames: Stream<NumassFrame> get() = Stream.empty()
 
     override val events: Stream<NumassEvent>
         get() = eventList.stream()
 
+    companion object {
+        suspend fun produce(startTime: Instant, length: Duration, producer: suspend () -> Iterable<OrphanNumassEvent>): SimpleBlock {
+            return SimpleBlock(startTime, length, producer())
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/numass-core/src/main/kotlin/inr/numass/data/api/SimpleNumassPoint.kt b/numass-core/src/main/kotlin/inr/numass/data/api/SimpleNumassPoint.kt
index b3cda470..6b757912 100644
--- a/numass-core/src/main/kotlin/inr/numass/data/api/SimpleNumassPoint.kt
+++ b/numass-core/src/main/kotlin/inr/numass/data/api/SimpleNumassPoint.kt
@@ -8,7 +8,7 @@ import hep.dataforge.meta.MetaHolder
  * A simple static implementation of NumassPoint
  * Created by darksnake on 08.07.2017.
  */
-class SimpleNumassPoint(override val blocks: List<NumassBlock>, meta: Meta) : MetaHolder(meta), NumassPoint {
+class SimpleNumassPoint(override val blocks: List<NumassBlock>, meta: Meta, override val isSequential: Boolean = true) : MetaHolder(meta), NumassPoint {
 
     /**
      * Input blocks must be sorted
diff --git a/numass-core/src/main/kotlin/inr/numass/data/legacy/NumassDatFile.kt b/numass-core/src/main/kotlin/inr/numass/data/legacy/NumassDatFile.kt
index 48515232..3db91de6 100644
--- a/numass-core/src/main/kotlin/inr/numass/data/legacy/NumassDatFile.kt
+++ b/numass-core/src/main/kotlin/inr/numass/data/legacy/NumassDatFile.kt
@@ -162,9 +162,7 @@ constructor(override val name: String, private val path: Path, meta: Meta) : Num
             voltage / 10.0
         }
 
-        val block = SimpleBlock(absoluteTime.toInstant(ZoneOffset.UTC), Duration.ofSeconds(length.toLong())) { parent ->
-            events.map { it.adopt(parent) }
-        }
+        val block = SimpleBlock(absoluteTime.toInstant(ZoneOffset.UTC), Duration.ofSeconds(length.toLong()), events)
 
         val pointMeta = MetaBuilder("point")
                 .setValue(HV_KEY, uSet)
diff --git a/numass-core/src/main/kotlin/inr/numass/data/storage/NumassStorageFactory.kt b/numass-core/src/main/kotlin/inr/numass/data/storage/NumassStorageFactory.kt
index 94201562..790528db 100644
--- a/numass-core/src/main/kotlin/inr/numass/data/storage/NumassStorageFactory.kt
+++ b/numass-core/src/main/kotlin/inr/numass/data/storage/NumassStorageFactory.kt
@@ -51,7 +51,7 @@ class NumassStorageFactory : StorageType {
             return NumassStorage(context, meta, path)
         } else {
             context.logger.warn("A storage path not provided. Creating default root storage in the working directory")
-            return NumassStorage(context, meta, context.io.workDir)
+            return NumassStorage(context, meta, context.workDir)
         }
     }
 
@@ -69,7 +69,7 @@ class NumassStorageFactory : StorageType {
         }
 
         fun buildLocal(context: Context, path: String, readOnly: Boolean, monitor: Boolean): FileStorage {
-            val file = context.io.dataDir.resolve(path)
+            val file = context.dataDir.resolve(path)
             return buildLocal(context, file, readOnly, monitor)
         }
 
diff --git a/numass-core/src/main/kotlin/inr/numass/data/storage/ProtoNumassPoint.kt b/numass-core/src/main/kotlin/inr/numass/data/storage/ProtoNumassPoint.kt
index 8c12f6fa..ba1e01df 100644
--- a/numass-core/src/main/kotlin/inr/numass/data/storage/ProtoNumassPoint.kt
+++ b/numass-core/src/main/kotlin/inr/numass/data/storage/ProtoNumassPoint.kt
@@ -70,7 +70,7 @@ class ProtoNumassPoint(override val meta: Meta, val protoBuilder: () -> NumassPr
         }
 
         fun readFile(path: String, context: Context = Global): ProtoNumassPoint {
-            return readFile(context.io.getFile(path).absolutePath)
+            return readFile(context.getFile(path).absolutePath)
         }
 
         fun ofEpochNanos(nanos: Long): Instant {
diff --git a/numass-main/src/main/groovy/inr/numass/scripts/models/TristanModel.groovy b/numass-main/src/main/groovy/inr/numass/scripts/models/TristanModel.groovy
index d21db35b..af21810a 100644
--- a/numass-main/src/main/groovy/inr/numass/scripts/models/TristanModel.groovy
+++ b/numass-main/src/main/groovy/inr/numass/scripts/models/TristanModel.groovy
@@ -97,6 +97,6 @@ new GrindShell(ctx).eval {
     def res = fm.runStage(state, "MINUIT", FitStage.TASK_RUN, "N", "bkg", "E0", "U2");
 
 
-    res.printState(ctx.io.out().newPrintWriter());
+    res.printState(ctx.getOutput.out().newPrintWriter());
     NumassIOKt.display(res, ctx, "fit")
 }
\ No newline at end of file
diff --git a/numass-main/src/main/groovy/inr/numass/scripts/workspace/TestActions.groovy b/numass-main/src/main/groovy/inr/numass/scripts/workspace/TestActions.groovy
index 7173ec42..e089b1dd 100644
--- a/numass-main/src/main/groovy/inr/numass/scripts/workspace/TestActions.groovy
+++ b/numass-main/src/main/groovy/inr/numass/scripts/workspace/TestActions.groovy
@@ -2,7 +2,7 @@ package inr.numass.scripts.workspace
 
 import hep.dataforge.actions.ActionUtils
 import hep.dataforge.context.Context
-import hep.dataforge.io.IOManager
+import hep.dataforge.io.OutputManager
 import inr.numass.NumassPlugin
 
 /**
@@ -12,5 +12,5 @@ import inr.numass.NumassPlugin
 
 Context context = new Context("numass");
 context.loadPlugin(new NumassPlugin());
-context.setValue(IOManager.ROOT_DIRECTORY_CONTEXT_KEY, "D:\\Work\\Numass\\sterile2016");
+context.setValue(OutputManager.ROOT_DIRECTORY_CONTEXT_KEY, "D:\\Work\\Numass\\sterile2016");
 ActionUtils.runConfig(context, "test.xml").computeAll()
\ No newline at end of file
diff --git a/numass-main/src/main/java/inr/numass/Main.java b/numass-main/src/main/java/inr/numass/Main.java
index de556851..591e44a7 100644
--- a/numass-main/src/main/java/inr/numass/Main.java
+++ b/numass-main/src/main/java/inr/numass/Main.java
@@ -18,7 +18,6 @@ package inr.numass;
 import hep.dataforge.actions.ActionUtils;
 import hep.dataforge.context.Context;
 import hep.dataforge.context.Global;
-import hep.dataforge.io.IOManager;
 import hep.dataforge.io.MetaFileReader;
 import hep.dataforge.meta.Meta;
 import org.apache.commons.cli.*;
@@ -86,7 +85,7 @@ public class Main {
                 return;
             }
 
-            java.nio.file.Path configFile = context.getIo().getRootDir().resolve(cfgPath);
+            java.nio.file.Path configFile = context.getRootDir().resolve(cfgPath);
 
             if (!Files.exists(configFile)) {
                 throw new FileNotFoundException("Configuration file not found");
@@ -94,7 +93,7 @@ public class Main {
 
             Meta config = MetaFileReader.Companion.read(configFile);
 
-            context.setValue(IOManager.ROOT_DIRECTORY_CONTEXT_KEY, configFile.getParent().toString());
+            context.setValue(Context.ROOT_DIRECTORY_CONTEXT_KEY, configFile.getParent().toString());
 
             applyCLItoContext(line, context);
 
@@ -103,11 +102,11 @@ public class Main {
     }
 
     public static void applyCLItoContext(CommandLine line, Context context) throws FileNotFoundException {
-        File workDir = new File(context.getString(IOManager.ROOT_DIRECTORY_CONTEXT_KEY));
+        File workDir = new File(context.getString(Context.ROOT_DIRECTORY_CONTEXT_KEY));
 
         if (line.hasOption("h")) {
             workDir = new File(line.getOptionValue("h"));
-            context.setValue(IOManager.ROOT_DIRECTORY_CONTEXT_KEY, workDir.toString());
+            context.setValue(Context.ROOT_DIRECTORY_CONTEXT_KEY, workDir.toString());
         }
 
         if (line.hasOption("d")) {
@@ -117,7 +116,7 @@ public class Main {
                 dataDir = new File(workDir, dataPath);
             }
             if (dataDir.exists() && dataDir.isDirectory()) {
-                context.setValue(IOManager.DATA_DIRECTORY_CONTEXT_KEY, dataDir.getAbsolutePath());
+                context.setValue(Context.DATA_DIRECTORY_CONTEXT_KEY, dataDir.getAbsolutePath());
             } else {
                 throw new FileNotFoundException("Data directory not found");
             }
@@ -132,7 +131,7 @@ public class Main {
             if (!outDir.exists()) {
                 outDir.mkdirs();
             }
-            context.setValue(IOManager.WORK_DIRECTORY_CONTEXT_KEY, outDir.toString());
+            context.setValue(Context.WORK_DIRECTORY_CONTEXT_KEY, outDir.toString());
         }
     }
 
diff --git a/numass-main/src/main/java/inr/numass/actions/MonitorCorrectAction.java b/numass-main/src/main/java/inr/numass/actions/MonitorCorrectAction.java
index a085b635..2bb75fef 100644
--- a/numass-main/src/main/java/inr/numass/actions/MonitorCorrectAction.java
+++ b/numass-main/src/main/java/inr/numass/actions/MonitorCorrectAction.java
@@ -129,7 +129,7 @@ public class MonitorCorrectAction extends OneToOneAction<Table, Table> {
 //        }
         Table res = ListTable.infer(dataList);
 
-        context.getIo().output(name, getName()).render(NumassUtils.INSTANCE.wrap(res, meta), Meta.empty());
+        context.getOutput().get(name, getName()).render(NumassUtils.INSTANCE.wrap(res, meta), Meta.empty());
 
         return res;
     }
@@ -194,7 +194,7 @@ public class MonitorCorrectAction extends OneToOneAction<Table, Table> {
             String monitorFileName = meta.getString("monitorFile", "monitor");
             ListTable data = ListTable.infer(monitorPoints);
 
-            context.getIo().output(monitorFileName, getName()).render(NumassUtils.INSTANCE.wrap(data, meta), Meta.empty());
+            context.getOutput().get(monitorFileName, getName()).render(NumassUtils.INSTANCE.wrap(data, meta), Meta.empty());
 //            ColumnedDataWriter.writeTable(stream, TableTransform.sort(data, "Timestamp", true), "Monitor points", monitorNames);
         }
     }
diff --git a/numass-main/src/main/java/inr/numass/actions/SubstractSpectrumAction.java b/numass-main/src/main/java/inr/numass/actions/SubstractSpectrumAction.java
index 8b84bc2c..380858df 100644
--- a/numass-main/src/main/java/inr/numass/actions/SubstractSpectrumAction.java
+++ b/numass-main/src/main/java/inr/numass/actions/SubstractSpectrumAction.java
@@ -31,7 +31,7 @@ public class SubstractSpectrumAction extends OneToOneAction<Table, Table> {
     protected Table execute(Context context, String name, Table input, Laminate inputMeta) {
         try {
             String referencePath = inputMeta. getString("file", "empty.dat");
-            Path referenceFile = context.getIo().getRootDir().resolve(referencePath);
+            Path referenceFile = context.getRootDir().resolve(referencePath);
             Table referenceTable = new ColumnedDataReader(referenceFile).toTable();
             ListTable.Builder builder = new ListTable.Builder(input.getFormat());
             input.getRows().forEach(point -> {
@@ -49,7 +49,7 @@ public class SubstractSpectrumAction extends OneToOneAction<Table, Table> {
 
             Table res = builder.build();
 
-            context.getIo().output(name, getName()).render(NumassUtils.INSTANCE.wrap(res, inputMeta), Meta.empty());
+            context.getOutput().get(name, getName()).render(NumassUtils.INSTANCE.wrap(res, inputMeta), Meta.empty());
             return res;
         } catch (IOException ex) {
             throw new RuntimeException("Could not read reference file", ex);
diff --git a/numass-main/src/main/java/inr/numass/models/TransmissionInterpolator.java b/numass-main/src/main/java/inr/numass/models/TransmissionInterpolator.java
index 7b4c108d..205894ea 100644
--- a/numass-main/src/main/java/inr/numass/models/TransmissionInterpolator.java
+++ b/numass-main/src/main/java/inr/numass/models/TransmissionInterpolator.java
@@ -40,7 +40,7 @@ public class TransmissionInterpolator implements UnivariateFunction {
 
     public static TransmissionInterpolator fromFile(Context context, String path, String xName, String yName, int nSmooth, double w, double border) {
         try {
-            Path dataFile = context.getIo().getRootDir().resolve(path);
+            Path dataFile = context.getRootDir().resolve(path);
             ColumnedDataReader reader = new ColumnedDataReader(Files.newInputStream(dataFile));
             return new TransmissionInterpolator(reader, xName, yName, nSmooth, w, border);
         } catch (IOException ex) {
diff --git a/numass-main/src/main/java/inr/numass/utils/OldDataReader.java b/numass-main/src/main/java/inr/numass/utils/OldDataReader.java
index 28a893f3..a023bafa 100644
--- a/numass-main/src/main/java/inr/numass/utils/OldDataReader.java
+++ b/numass-main/src/main/java/inr/numass/utils/OldDataReader.java
@@ -40,7 +40,7 @@ public class OldDataReader {
     public static Table readConfig(String path) throws IOException {
         String[] list = {"X", "time", "ushift"};
         ListTable.Builder res = new ListTable.Builder(list);
-        Path file = Global.INSTANCE.getIo().getRootDir().resolve(path);
+        Path file = Global.INSTANCE.getRootDir().resolve(path);
         Scanner sc = new Scanner(file);
         sc.nextLine();
 
@@ -62,7 +62,7 @@ public class OldDataReader {
     public static Table readData(String path, double Elow) {
         SpectrumAdapter factory = new SpectrumAdapter(Meta.empty());
         ListTable.Builder res = new ListTable.Builder(Adapters.getFormat(factory));
-        Path file = Global.INSTANCE.getIo().getRootDir().resolve(path);
+        Path file = Global.INSTANCE.getRootDir().resolve(path);
         double x;
         int count;
         int time;
@@ -114,7 +114,7 @@ public class OldDataReader {
     public static Table readDataAsGun(String path, double Elow) {
         SpectrumAdapter factory = new SpectrumAdapter(Meta.empty());
         ListTable.Builder res = new ListTable.Builder(Adapters.getFormat(factory));
-        Path file = Global.INSTANCE.getIo().getRootDir().resolve(path);
+        Path file = Global.INSTANCE.getRootDir().resolve(path);
         double x;
         long count;
         int time;
@@ -147,7 +147,7 @@ public class OldDataReader {
     public static Table readSpectrumData(String path) {
         SpectrumAdapter factory = new SpectrumAdapter(Meta.empty());
         ListTable.Builder res = new ListTable.Builder(Adapters.getFormat(factory));
-        Path file = Global.INSTANCE.getIo().getRootDir().resolve(path);
+        Path file = Global.INSTANCE.getRootDir().resolve(path);
         double x;
         double count;
         double time;
diff --git a/numass-main/src/main/kotlin/inr/numass/NumassPlugin.kt b/numass-main/src/main/kotlin/inr/numass/NumassPlugin.kt
index 8e209bc9..837939b0 100644
--- a/numass-main/src/main/kotlin/inr/numass/NumassPlugin.kt
+++ b/numass-main/src/main/kotlin/inr/numass/NumassPlugin.kt
@@ -43,7 +43,7 @@ import org.apache.commons.math3.util.FastMath
 @PluginDef(
         group = "inr.numass",
         name = "numass",
-        dependsOn = arrayOf("hep.dataforge:functions", "hep.dataforge:MINUIT", "hep.dataforge:actions", "hep.dataforge:io.dir"),
+        dependsOn = arrayOf("hep.dataforge:functions", "hep.dataforge:MINUIT", "hep.dataforge:actions", "hep.dataforge:output.dir"),
         support = false,
         info = "Numass data analysis tools"
 )
diff --git a/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt b/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt
index a87a5c6f..ae44231d 100644
--- a/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt
+++ b/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt
@@ -177,8 +177,8 @@ object NumassUtils {
 fun getFSS(context: Context, meta: Meta): FSS? {
     return if (meta.getBoolean("useFSS", true)) {
         val fssBinary: Binary? = meta.optString("fssFile")
-                .map { fssFile -> context.io.getFile(fssFile).binary }
-                .orElse(context.io.optResource("data/FS.txt").nullable)
+                .map { fssFile -> context.getFile(fssFile).binary }
+                .orElse(context.optResource("data/FS.txt").nullable)
         fssBinary?.let { FSS(it.stream) } ?: throw RuntimeException("Could not load FSS file")
     } else {
         null
diff --git a/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt b/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt
index 0d06c85e..71740d86 100644
--- a/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt
+++ b/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt
@@ -60,7 +60,7 @@ class MergeDataAction : ManyToOneAction<Table, Table>() {
     }
 
     override fun afterGroup(context: Context, groupName: String, outputMeta: Meta, output: Table) {
-        context.io.output(groupName, name).render(NumassUtils.wrap(output, outputMeta))
+        context.output.get(groupName, name).render(NumassUtils.wrap(output, outputMeta))
         super.afterGroup(context, groupName, outputMeta, output)
     }
 
diff --git a/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt b/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt
index 5bd45e1f..2e6c26c2 100644
--- a/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt
+++ b/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt
@@ -108,7 +108,7 @@ object SummaryAction : ManyToOneAction<FitState, Table>() {
     }
 
     override fun afterGroup(context: Context, groupName: String, outputMeta: Meta, output: Table) {
-        context.io.output(groupName, name).render(NumassUtils.wrap(output, outputMeta))
+        context.output.get(groupName, name).render(NumassUtils.wrap(output, outputMeta))
         super.afterGroup(context, groupName, outputMeta, output)
     }
 
diff --git a/numass-main/src/main/kotlin/inr/numass/actions/TransformDataAction.kt b/numass-main/src/main/kotlin/inr/numass/actions/TransformDataAction.kt
index 9cfc634c..e8c1d679 100644
--- a/numass-main/src/main/kotlin/inr/numass/actions/TransformDataAction.kt
+++ b/numass-main/src/main/kotlin/inr/numass/actions/TransformDataAction.kt
@@ -103,7 +103,7 @@ class TransformDataAction : OneToOneAction<Table, Table>() {
         val res = table.addColumn(ListColumn.build(table.getColumn(COUNT_RATE_KEY).format, cr.stream()))
                 .addColumn(ListColumn.build(table.getColumn(COUNT_RATE_ERROR_KEY).format, crErr.stream()))
 
-        context.io.output(name, name).render(NumassUtils.wrap(res, meta))
+        context.output.get(name, name).render(NumassUtils.wrap(res, meta))
         return res
     }
 
diff --git a/numass-main/src/main/kotlin/inr/numass/data/Generator.kt b/numass-main/src/main/kotlin/inr/numass/data/Generator.kt
index f5a53edd..4f3c8b78 100644
--- a/numass-main/src/main/kotlin/inr/numass/data/Generator.kt
+++ b/numass-main/src/main/kotlin/inr/numass/data/Generator.kt
@@ -7,8 +7,9 @@ import hep.dataforge.stat.defaultGenerator
 import hep.dataforge.tables.Table
 import inr.numass.data.analyzers.NumassAnalyzer.Companion.CHANNEL_KEY
 import inr.numass.data.analyzers.NumassAnalyzer.Companion.COUNT_RATE_KEY
-import inr.numass.data.api.*
-import kotlinx.coroutines.experimental.channels.map
+import inr.numass.data.api.NumassBlock
+import inr.numass.data.api.OrphanNumassEvent
+import inr.numass.data.api.SimpleBlock
 import kotlinx.coroutines.experimental.channels.takeWhile
 import kotlinx.coroutines.experimental.channels.toList
 import org.apache.commons.math3.distribution.EnumeratedRealDistribution
@@ -24,9 +25,9 @@ private fun RandomGenerator.nextDeltaTime(cr: Double): Long {
     return (nextExp(1.0 / cr) * 1e9).toLong()
 }
 
-fun generateBlock(start: Instant, length: Long, chain: Chain<OrphanNumassEvent>): NumassBlock {
-    return SimpleBlock(start, Duration.ofNanos(length)) { parent ->
-        chain.channel.map { it.adopt(parent) }.takeWhile { it.timeOffset < length }.toList()
+suspend fun Chain<OrphanNumassEvent>.generateBlock(start: Instant, length: Long): NumassBlock {
+    return SimpleBlock.produce(start, Duration.ofNanos(length)) {
+        channel.takeWhile { it.timeOffset < length }.toList()
     }
 }
 
diff --git a/numass-main/src/main/kotlin/inr/numass/data/PileUpSimulator.kt b/numass-main/src/main/kotlin/inr/numass/data/PileUpSimulator.kt
index ef01a0ab..bd9ee8c8 100644
--- a/numass-main/src/main/kotlin/inr/numass/data/PileUpSimulator.kt
+++ b/numass-main/src/main/kotlin/inr/numass/data/PileUpSimulator.kt
@@ -25,7 +25,6 @@ import hep.dataforge.maths.chain.Chain
 import inr.numass.data.api.NumassBlock
 import inr.numass.data.api.OrphanNumassEvent
 import inr.numass.data.api.SimpleBlock
-import inr.numass.data.api.adopt
 import kotlinx.coroutines.experimental.runBlocking
 import org.apache.commons.math3.random.RandomGenerator
 import java.lang.Math.max
@@ -67,15 +66,15 @@ class PileUpSimulator {
 //    }
 
     fun generated(): NumassBlock {
-        return SimpleBlock(Instant.EPOCH, Duration.ofNanos(pointLength)) { parent -> generated.map { it.adopt(parent) } }
+        return SimpleBlock(Instant.EPOCH, Duration.ofNanos(pointLength), generated)
     }
 
     fun registered(): NumassBlock {
-        return SimpleBlock(Instant.EPOCH, Duration.ofNanos(pointLength)) { parent -> registered.map { it.adopt(parent) } }
+        return SimpleBlock(Instant.EPOCH, Duration.ofNanos(pointLength), registered)
     }
 
     fun pileup(): NumassBlock {
-        return SimpleBlock(Instant.EPOCH, Duration.ofNanos(pointLength)) { parent -> pileup.map { it.adopt(parent) } }
+        return SimpleBlock(Instant.EPOCH, Duration.ofNanos(pointLength), pileup)
     }
 
     /**
@@ -126,7 +125,7 @@ class PileUpSimulator {
     fun generate() {
         var next: OrphanNumassEvent
         //var lastRegisteredTime = 0.0 // Time of DAQ closing
-        val last = AtomicReference<OrphanNumassEvent>(OrphanNumassEvent(0,0))
+        val last = AtomicReference<OrphanNumassEvent>(OrphanNumassEvent(0, 0))
 
         //flag that shows that previous event was pileup
         var pileupFlag = false
diff --git a/numass-main/src/main/kotlin/inr/numass/scripts/Bunches.kt b/numass-main/src/main/kotlin/inr/numass/scripts/Bunches.kt
index 1ccedf95..2731159e 100644
--- a/numass-main/src/main/kotlin/inr/numass/scripts/Bunches.kt
+++ b/numass-main/src/main/kotlin/inr/numass/scripts/Bunches.kt
@@ -8,6 +8,9 @@ import inr.numass.data.buildBunchChain
 import inr.numass.data.generateBlock
 import inr.numass.data.generateEvents
 import inr.numass.data.mergeEventChains
+import kotlinx.coroutines.experimental.channels.produce
+import kotlinx.coroutines.experimental.channels.toList
+import kotlinx.coroutines.experimental.runBlocking
 import java.time.Instant
 
 fun main(args: Array<String>) {
@@ -18,14 +21,22 @@ fun main(args: Array<String>) {
     val length = 1e12.toLong()
     val num = 60;
 
-    val blocks = (1..num).map {
-        val regularChain = generateEvents(cr)
-        val bunchChain = buildBunchChain(40.0, 0.01, 5.0)
+    val start = Instant.now()
 
-        val generator = mergeEventChains(regularChain, bunchChain)
-        generateBlock(Instant.now().plusNanos(it * length), length, generator)
+    val blockchannel = produce {
+        (1..num).forEach {
+            val regularChain = generateEvents(cr)
+            val bunchChain = buildBunchChain(40.0, 0.01, 5.0)
+
+            send(mergeEventChains(regularChain, bunchChain).generateBlock(start.plusNanos(it * length), length))
+        }
     }
 
+    val blocks = runBlocking {
+        blockchannel.toList()
+    }
+
+
     val point = SimpleNumassPoint(blocks, 10000.0)
 
     val meta = buildMeta {
@@ -37,7 +48,7 @@ fun main(args: Array<String>) {
 
     println("actual count rate: ${point.events.count().toDouble() / point.length.seconds}")
 
-    TimeAnalyzerAction().simpleRun(point,meta)
+    TimeAnalyzerAction().simpleRun(point, meta)
 
 //    val res = SmartAnalyzer().analyze(point, meta)
 //            .getDouble(NumassAnalyzer.COUNT_RATE_KEY)
diff --git a/numass-main/src/main/kotlin/inr/numass/scripts/timeanalysis/TestAnalyzer.kt b/numass-main/src/main/kotlin/inr/numass/scripts/timeanalysis/TestAnalyzer.kt
index 0c9d75b2..308f6659 100644
--- a/numass-main/src/main/kotlin/inr/numass/scripts/timeanalysis/TestAnalyzer.kt
+++ b/numass-main/src/main/kotlin/inr/numass/scripts/timeanalysis/TestAnalyzer.kt
@@ -8,6 +8,9 @@ import inr.numass.actions.TimeAnalyzerAction
 import inr.numass.data.api.OrphanNumassEvent
 import inr.numass.data.api.SimpleNumassPoint
 import inr.numass.data.generateBlock
+import kotlinx.coroutines.experimental.channels.produce
+import kotlinx.coroutines.experimental.channels.toList
+import kotlinx.coroutines.experimental.runBlocking
 import org.apache.commons.math3.random.JDKRandomGenerator
 import org.apache.commons.math3.random.RandomGenerator
 import java.time.Instant
@@ -18,7 +21,7 @@ fun main(args: Array<String>) {
 
     val cr = 30e3
     val length = 30e9.toLong()
-    val num = 20
+    val num = 4
     val dt = 6.5
 
     val rnd = JDKRandomGenerator()
@@ -32,16 +35,26 @@ fun main(args: Array<String>) {
     }
 
 
-    val chain = MarkovChain(OrphanNumassEvent(1000, 0)) { event ->
-        //val deltaT = rnd.nextDeltaTime(cr * exp(- event.timeOffset / 1e11))
-        val deltaT = rnd.nextDeltaTime(cr)
-        OrphanNumassEvent(1000, event.timeOffset + deltaT)
+    val start = Instant.now()
+
+    //TODO make parallel
+    val blockChannel = produce {
+        (1..num).forEach {
+            send(
+                    MarkovChain(OrphanNumassEvent(1000, 0)) { event ->
+                        //val deltaT = rnd.nextDeltaTime(cr * exp(- event.timeOffset / 1e11))
+                        val deltaT = rnd.nextDeltaTime(cr)
+                        OrphanNumassEvent(1000, event.timeOffset + deltaT)
+                    }.generateBlock(start.plusNanos(it * length), length)
+            )
+        }
     }
 
-    val blocks = (1..num).map {
-        generateBlock(Instant.now().plusNanos(it * length), length, chain)
+    val blocks = runBlocking {
+        blockChannel.toList()
     }
 
+
     val point = SimpleNumassPoint(blocks, 12000.0)
 
     val meta = buildMeta {
diff --git a/numass-main/src/main/kotlin/inr/numass/scripts/tristan/AnalyzeTristan.kt b/numass-main/src/main/kotlin/inr/numass/scripts/tristan/AnalyzeTristan.kt
index bdb22354..6fc1364c 100644
--- a/numass-main/src/main/kotlin/inr/numass/scripts/tristan/AnalyzeTristan.kt
+++ b/numass-main/src/main/kotlin/inr/numass/scripts/tristan/AnalyzeTristan.kt
@@ -4,6 +4,7 @@ import inr.numass.data.channel
 import inr.numass.data.plotAmplitudeSpectrum
 import inr.numass.data.storage.ProtoNumassPoint
 import inr.numass.data.transformChain
+import kotlinx.coroutines.experimental.runBlocking
 import java.io.File
 
 fun main(args: Array<String>) {
@@ -26,36 +27,39 @@ fun main(args: Array<String>) {
         println("Number of events for pixel 4 is ${it.events.count()}")
     }
 
-    listOf(0, 20, 50, 100, 200).forEach { window ->
+    runBlocking {
+        listOf(0, 20, 50, 100, 200).forEach { window ->
 
-        point.transformChain { first, second ->
-            val dt = second.timeOffset - first.timeOffset
-            if (second.channel == 4 && first.channel == 0 && dt > window && dt < 1000) {
-                Pair((first.amplitude + second.amplitude).toShort(), second.timeOffset)
-            } else {
-                null
+            point.transformChain { first, second ->
+                val dt = second.timeOffset - first.timeOffset
+                if (second.channel == 4 && first.channel == 0 && dt > window && dt < 1000) {
+                    Pair((first.amplitude + second.amplitude).toShort(), second.timeOffset)
+                } else {
+                    null
+                }
+            }.also {
+                println("Number of events for $window is ${it.events.count()}")
+            }.plotAmplitudeSpectrum(plotName = "filtered.before.$window") {
+                "binning" to 50
             }
-        }.also {
-            println("Number of events for $window is ${it.events.count()}")
-        }.plotAmplitudeSpectrum(plotName = "filtered.before.$window") {
-            "binning" to 50
+
         }
 
-    }
+        listOf(0, 20, 50, 100, 200).forEach { window ->
 
-    listOf(0, 20, 50, 100, 200).forEach { window ->
-
-        point.transformChain { first, second ->
-            val dt = second.timeOffset - first.timeOffset
-            if (second.channel == 0 && first.channel == 4 && dt > window && dt < 1000) {
-                Pair((first.amplitude + second.amplitude).toShort(), second.timeOffset)
-            } else {
-                null
+            point.transformChain { first, second ->
+                val dt = second.timeOffset - first.timeOffset
+                if (second.channel == 0 && first.channel == 4 && dt > window && dt < 1000) {
+                    Pair((first.amplitude + second.amplitude).toShort(), second.timeOffset)
+                } else {
+                    null
+                }
+            }.also {
+                println("Number of events for $window is ${it.events.count()}")
+            }.plotAmplitudeSpectrum(plotName = "filtered.after.$window") {
+                "binning" to 50
             }
-        }.also {
-            println("Number of events for $window is ${it.events.count()}")
-        }.plotAmplitudeSpectrum(plotName = "filtered.after.$window") {
-            "binning" to 50
+
         }
 
     }
diff --git a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt
index 7eda317e..98e8d881 100644
--- a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt
+++ b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt
@@ -68,7 +68,7 @@ object NumassFitScanSummaryTask : AbstractTask<Table>() {
                         pars.getValue("trap"))
             }
             val res = TableTransform.sort(builder.build(), "m", true)
-            context.io.output(nodeName, stage = name).render(NumassUtils.wrap(res, meta))
+            context.output.get(nodeName, stage = name).render(NumassUtils.wrap(res, meta))
             return res
         }
 
diff --git a/numass-main/src/main/kotlin/inr/numass/tasks/NumassTasks.kt b/numass-main/src/main/kotlin/inr/numass/tasks/NumassTasks.kt
index 528074b9..f4d03762 100644
--- a/numass-main/src/main/kotlin/inr/numass/tasks/NumassTasks.kt
+++ b/numass-main/src/main/kotlin/inr/numass/tasks/NumassTasks.kt
@@ -60,7 +60,7 @@ val analyzeTask = task("analyze") {
     pipe<NumassSet, Table> { set ->
         SmartAnalyzer().analyzeSet(set, meta).also { res ->
             val outputMeta = meta.builder.putNode("data", set.meta)
-            context.io.output(name, stage = "numass.analyze").render(NumassUtils.wrap(res, outputMeta))
+            context.output.get(name, stage = "numass.analyze").render(NumassUtils.wrap(res, outputMeta))
         }
     }
 }
@@ -105,13 +105,13 @@ val monitorTableTask = task("monitor") {
                         //add set markers
                         addSetMarkers(frame, data.values)
                     }
-                    context.io.output(name, stage = "numass.monitor", type = "dfp").render(PlotFrame.Wrapper().wrap(frame))
+                    context.output.get(name, stage = "numass.monitor", type = "dfp").render(PlotFrame.Wrapper().wrap(frame))
 
                 }
             }
         }
 
-        context.io.output(name, stage = "numass.monitor").render(NumassUtils.wrap(res, meta))
+        context.output.get(name, stage = "numass.monitor").render(NumassUtils.wrap(res, meta))
 
         return@join res;
     }
@@ -170,7 +170,7 @@ val subtractEmptyTask = task("dif") {
 
             res.goal.onComplete { r, _ ->
                 if (r != null) {
-                    context.io.output(input.name + "_subtract", stage = "numass.merge").render(NumassUtils.wrap(r, resMeta))
+                    context.output.get(input.name + "_subtract", stage = "numass.merge").render(NumassUtils.wrap(r, resMeta))
                 }
             }
 
@@ -221,7 +221,7 @@ val fitTask = task("fit") {
         configure(meta.getMeta("fit"))
     }
     pipe<Table, FitResult> { data ->
-        context.io.stream(name, "numass.fit").use { out ->
+        context.output.stream(name, "numass.fit").use { out ->
             val writer = PrintWriter(out)
             writer.printf("%n*** META ***%n")
             writer.println(meta.toString())
diff --git a/numass-server/src/main/java/inr/numass/server/ServerRunner.java b/numass-server/src/main/java/inr/numass/server/ServerRunner.java
index 19a88a97..ae9acb4e 100644
--- a/numass-server/src/main/java/inr/numass/server/ServerRunner.java
+++ b/numass-server/src/main/java/inr/numass/server/ServerRunner.java
@@ -29,7 +29,7 @@ public class ServerRunner extends SimpleConfigurable implements AutoCloseable {
     public ServerRunner() throws IOException, ParseException {
 //        Global.instance().getPluginManager().load(StorageManager.class);
 
-        Path configFile = context.getIo().getFile(SERVER_CONFIG_PATH).getPath();
+        Path configFile = context.getOutput().getFile(SERVER_CONFIG_PATH).getPath();
         if (Files.exists(configFile)) {
             context.getLogger().info("Trying to read server configuration from {}", SERVER_CONFIG_PATH);
             configure(MetaFileReader.Companion.read(configFile));