diff --git a/disk/src/agg.rs b/disk/src/agg.rs
index 1bb1bfc..a687c2a 100644
--- a/disk/src/agg.rs
+++ b/disk/src/agg.rs
@@ -52,6 +52,7 @@ impl std::fmt::Debug for ValuesDim0 {
     }
 }
 
+// TODO get rid of AggregatableXdim1Bin and ValuesDim1
 impl<SK> AggregatableXdim1Bin<SK> for ValuesDim1
 where
     SK: StreamKind,
diff --git a/disk/src/binned.rs b/disk/src/binned.rs
index 58b2784..aec6e15 100644
--- a/disk/src/binned.rs
+++ b/disk/src/binned.rs
@@ -20,7 +20,7 @@ use netpod::log::*;
 use netpod::{
     AggKind, BinnedRange, NanoRange, NodeConfigCached, PerfOpts, PreBinnedPatchIterator, PreBinnedPatchRange,
 };
-use num_traits::Zero;
+use num_traits::{AsPrimitive, Bounded, Zero};
 use parse::channelconfig::{extract_matching_config_entry, read_local_config, MatchingConfigEntry};
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Serialize, Serializer};
@@ -555,8 +555,8 @@ impl TBinnedBins for MinMaxAvgScalarBinBatch {
 // I would like to decide on the disk-dtype first and get some generic intermediate type, and the
 // decide the AggKind, and maybe even other generic types.
 
-pub trait NumOps: Sized + Send + Unpin + Zero + BitXor {}
-impl<T> NumOps for T where T: Sized + Send + Unpin + Zero + BitXor {}
+pub trait NumOps: Sized + Copy + Send + Unpin + Zero + BitXor + AsPrimitive<f32> + Bounded + PartialOrd {}
+impl<T> NumOps for T where T: Sized + Copy + Send + Unpin + Zero + BitXor + AsPrimitive<f32> + Bounded + PartialOrd {}
 
 pub trait EventsDecoder {
     type Output;
@@ -567,7 +567,7 @@ pub trait EventsDecoder {
 pub trait EventsNodeProcessor {
     type Input;
     type Output;
-    fn process(inp: &EventValues<Self::Input>) -> Self::Output;
+    fn process(inp: EventValues<Self::Input>) -> Self::Output;
 }
 
 pub struct NumEvents<N> {
diff --git a/disk/src/decode.rs b/disk/src/decode.rs
index 5263c7c..337011b 100644
--- a/disk/src/decode.rs
+++ b/disk/src/decode.rs
@@ -1,13 +1,14 @@
-use crate::agg::eventbatch::MinMaxAvgScalarEventBatch;
 use crate::agg::scalarbinbatch::MinMaxAvgScalarBinBatch;
 use crate::agg::streams::StreamItem;
 use crate::binned::{EventsNodeProcessor, NumOps, RangeCompletableItem};
 use crate::eventblobs::EventBlobsComplete;
 use crate::eventchunker::EventFull;
+use crate::frame::makeframe::{make_frame, Framable};
+use bytes::BytesMut;
 use err::Error;
 use futures_core::Stream;
 use futures_util::StreamExt;
-use netpod::ScalarType;
+use serde::{Deserialize, Serialize};
 use std::marker::PhantomData;
 use std::mem::size_of;
 use std::pin::Pin;
@@ -40,7 +41,7 @@ where
     NTY: NumFromBytes<NTY, END>,
 {
     type Output;
-    fn convert(buf: &[u8]) -> Self::Output;
+    fn convert(&self, buf: &[u8]) -> Result<Self::Output, Error>;
 }
 
 impl<NTY, END> EventValueFromBytes<NTY, END> for EventValuesDim0Case<NTY>
@@ -48,8 +49,9 @@ where
     NTY: NumFromBytes<NTY, END>,
 {
     type Output = NTY;
-    fn convert(buf: &[u8]) -> Self::Output {
-        NTY::convert(buf)
+
+    fn convert(&self, buf: &[u8]) -> Result<Self::Output, Error> {
+        Ok(NTY::convert(buf))
     }
 }
 
@@ -58,16 +60,20 @@ where
     NTY: NumFromBytes<NTY, END>,
 {
     type Output = Vec<NTY>;
-    fn convert(buf: &[u8]) -> Self::Output {
+
+    fn convert(&self, buf: &[u8]) -> Result<Self::Output, Error> {
         let es = size_of::<NTY>();
         let n1 = buf.len() / es;
+        if n1 != self.n as usize {
+            return Err(Error::with_msg(format!("ele count  got {}  exp {}", n1, self.n)));
+        }
         let mut vals = vec![];
         // TODO could optimize using unsafe code..
         for n2 in 0..n1 {
             let i1 = es * n2;
             vals.push(<NTY as NumFromBytes<NTY, END>>::convert(&buf[i1..(i1 + es)]));
         }
-        vals
+        Ok(vals)
     }
 }
 
@@ -95,8 +101,9 @@ pub struct ProcAA<NTY> {
 
 impl<NTY> EventsNodeProcessor for ProcAA<NTY> {
     type Input = NTY;
-    type Output = MinMaxAvgScalarEventBatch;
-    fn process(inp: &EventValues<Self::Input>) -> Self::Output {
+    type Output = MinMaxAvgScalarBinBatch;
+
+    fn process(_inp: EventValues<Self::Input>) -> Self::Output {
         todo!()
     }
 }
@@ -124,11 +131,93 @@ pub struct ProcBB<NTY> {
     _m1: PhantomData<NTY>,
 }
 
-impl<NTY> EventsNodeProcessor for ProcBB<NTY> {
+#[derive(Serialize, Deserialize)]
+pub struct MinMaxAvgScalarEventBatchGen<NTY> {
+    pub tss: Vec<u64>,
+    pub mins: Vec<Option<NTY>>,
+    pub maxs: Vec<Option<NTY>>,
+    pub avgs: Vec<Option<f32>>,
+}
+
+impl<NTY> MinMaxAvgScalarEventBatchGen<NTY> {
+    pub fn empty() -> Self {
+        Self {
+            tss: vec![],
+            mins: vec![],
+            maxs: vec![],
+            avgs: vec![],
+        }
+    }
+}
+
+impl<NTY> Framable for Result<StreamItem<RangeCompletableItem<MinMaxAvgScalarEventBatchGen<NTY>>>, Error>
+where
+    NTY: NumOps + Serialize,
+{
+    fn make_frame(&self) -> Result<BytesMut, Error> {
+        make_frame(self)
+    }
+}
+
+impl<NTY> EventsNodeProcessor for ProcBB<NTY>
+where
+    NTY: NumOps,
+{
     type Input = Vec<NTY>;
-    type Output = MinMaxAvgScalarBinBatch;
-    fn process(inp: &EventValues<Self::Input>) -> Self::Output {
-        todo!()
+    type Output = MinMaxAvgScalarEventBatchGen<NTY>;
+
+    fn process(inp: EventValues<Self::Input>) -> Self::Output {
+        let nev = inp.tss.len();
+        let mut ret = MinMaxAvgScalarEventBatchGen {
+            tss: inp.tss,
+            mins: Vec::with_capacity(nev),
+            maxs: Vec::with_capacity(nev),
+            avgs: Vec::with_capacity(nev),
+        };
+        for i1 in 0..nev {
+            let mut min = None;
+            let mut max = None;
+            let mut sum = 0f32;
+            let mut count = 0;
+            let vals = &inp.values[i1];
+            for i2 in 0..vals.len() {
+                let v = vals[i2];
+                min = match min {
+                    None => Some(v),
+                    Some(min) => {
+                        if v < min {
+                            Some(v)
+                        } else {
+                            Some(min)
+                        }
+                    }
+                };
+                max = match max {
+                    None => Some(v),
+                    Some(max) => {
+                        if v > max {
+                            Some(v)
+                        } else {
+                            Some(max)
+                        }
+                    }
+                };
+                let vf = v.as_();
+                if vf.is_nan() {
+                } else {
+                    sum += vf;
+                    count += 1;
+                }
+            }
+            ret.mins.push(min);
+            ret.maxs.push(max);
+            if count == 0 {
+                ret.avgs.push(None);
+            } else {
+                ret.avgs.push(Some(sum / count as f32));
+            }
+        }
+        ret
     }
 }
 
@@ -177,6 +266,7 @@ where
     END: Endianness,
     EVS: EventValueShape<NTY, END>,
 {
+    evs: EVS,
     event_blobs: EventBlobsComplete,
     completed: bool,
     errored: bool,
@@ -191,8 +281,9 @@ where
     END: Endianness,
     EVS: EventValueShape<NTY, END> + EventValueFromBytes<NTY, END>,
 {
-    pub fn new(event_blobs: EventBlobsComplete) -> Self {
+    pub fn new(evs: EVS, event_blobs: EventBlobsComplete) -> Self {
         Self {
+            evs,
             event_blobs,
             completed: false,
             errored: false,
@@ -212,7 +303,7 @@ where
 
             let decomp = ev.decomps[i1].as_ref().unwrap().as_ref();
 
-            let val = <EVS as EventValueFromBytes<NTY, END>>::convert(decomp);
+            let val = self.evs.convert(decomp)?;
             ret.tss.push(ev.tss[i1]);
             ret.values.push(val);
         }
diff --git a/disk/src/frame/makeframe.rs b/disk/src/frame/makeframe.rs
index f365f29..98d3d2f 100644
--- a/disk/src/frame/makeframe.rs
+++ b/disk/src/frame/makeframe.rs
@@ -2,6 +2,7 @@ use crate::agg::eventbatch::MinMaxAvgScalarEventBatch;
 use crate::agg::scalarbinbatch::MinMaxAvgScalarBinBatch;
 use crate::agg::streams::StreamItem;
 use crate::binned::RangeCompletableItem;
+use crate::decode::MinMaxAvgScalarEventBatchGen;
 use crate::frame::inmem::InMemoryFrame;
 use crate::raw::EventQueryJsonStringFrame;
 use bytes::{BufMut, BytesMut};
@@ -28,6 +29,30 @@ impl FrameType for Result<StreamItem<RangeCompletableItem<MinMaxAvgScalarEventBa
     const FRAME_TYPE_ID: u32 = 0x11;
 }
 
+impl<NTY> FrameType for Result<StreamItem<RangeCompletableItem<MinMaxAvgScalarEventBatchGen<NTY>>>, Error> {
+    const FRAME_TYPE_ID: u32 = 888888;
+}
+
+pub trait ProvidesFrameType {
+    fn frame_type_id(&self) -> u32;
+}
+
+pub trait Framable: Send {
+    fn make_frame(&self) -> Result<BytesMut, Error>;
+}
+
+impl Framable for Result<StreamItem<RangeCompletableItem<MinMaxAvgScalarBinBatch>>, Error> {
+    fn make_frame(&self) -> Result<BytesMut, Error> {
+        make_frame(self)
+    }
+}
+
+impl Framable for Result<StreamItem<RangeCompletableItem<MinMaxAvgScalarEventBatch>>, Error> {
+    fn make_frame(&self) -> Result<BytesMut, Error> {
+        make_frame(self)
+    }
+}
+
 pub fn make_frame<FT>(item: &FT) -> Result<BytesMut, Error>
 where
     FT: FrameType + Serialize,
diff --git a/disk/src/raw/conn.rs b/disk/src/raw/conn.rs
index feb83bb..d321e78 100644
--- a/disk/src/raw/conn.rs
+++ b/disk/src/raw/conn.rs
@@ -3,17 +3,16 @@ use crate::agg::eventbatch::MinMaxAvgScalarEventBatch;
 use crate::agg::streams::StreamItem;
 use crate::agg::IntoDim1F32Stream;
 use crate::binned::{
-    BinnedStreamKindScalar, EventsNodeProcessor, MakeBytesFrame, NumBinnedPipeline, NumOps, RangeCompletableItem,
-    StreamKind,
+    BinnedStreamKindScalar, EventsNodeProcessor, NumBinnedPipeline, NumOps, RangeCompletableItem, StreamKind,
 };
 use crate::decode::{
-    BigEndian, Endianness, EventValueFromBytes, EventValueShape, EventValues, EventValuesDim0Case, EventValuesDim1Case,
+    BigEndian, Endianness, EventValueFromBytes, EventValueShape, EventValuesDim0Case, EventValuesDim1Case,
     EventsDecodedStream, LittleEndian, NumFromBytes,
 };
 use crate::eventblobs::EventBlobsComplete;
 use crate::eventchunker::EventChunkerConf;
 use crate::frame::inmem::InMemoryFrameAsyncReadStream;
-use crate::frame::makeframe::{decode_frame, make_frame, make_term_frame, FrameType};
+use crate::frame::makeframe::{decode_frame, make_frame, make_term_frame, Framable, FrameType};
 use crate::raw::{EventQueryJsonStringFrame, EventsQuery};
 use crate::Sitemty;
 use err::Error;
@@ -22,7 +21,6 @@ use futures_util::StreamExt;
 use netpod::log::*;
 use netpod::{AggKind, ByteOrder, ByteSize, NodeConfigCached, PerfOpts, ScalarType, Shape};
 use parse::channelconfig::{extract_matching_config_entry, read_local_config, MatchingConfigEntry};
-use serde::Serialize;
 use std::io;
 use std::net::SocketAddr;
 use std::pin::Pin;
@@ -99,12 +97,10 @@ impl<E: Into<Error>> From<(E, OwnedWriteHalf)> for ConnErr {
     }
 }
 
-pub trait Framable: FrameType + Serialize + Send {}
-
 // returns Pin<Box<dyn Stream<Item = Sitemty<<ENP as EventsNodeProcessor>::Output>> + Send>>
 
 fn make_num_pipeline_stream_evs<NTY, END, EVS, ENP>(
-    _event_value_shape: EVS,
+    event_value_shape: EVS,
     event_blobs: EventBlobsComplete,
 ) -> Pin<Box<dyn Stream<Item = Box<dyn Framable>> + Send>>
 where
@@ -112,15 +108,16 @@ where
     END: Endianness + 'static,
     EVS: EventValueShape<NTY, END> + EventValueFromBytes<NTY, END> + 'static,
     ENP: EventsNodeProcessor<Input = <EVS as EventValueFromBytes<NTY, END>>::Output>,
-    Sitemty<<ENP as EventsNodeProcessor>::Output>: FrameType + Serialize,
+    Sitemty<<ENP as EventsNodeProcessor>::Output>: Framable + 'static,
+    <ENP as EventsNodeProcessor>::Output: 'static,
 {
     NumBinnedPipeline::<NTY, END, ENP>::new();
-    let decs = EventsDecodedStream::<NTY, END, EVS>::new(event_blobs);
+    let decs = EventsDecodedStream::<NTY, END, EVS>::new(event_value_shape, event_blobs);
     let s2 = StreamExt::map(decs, |item| match item {
         Ok(item) => match item {
             StreamItem::DataItem(item) => match item {
                 RangeCompletableItem::Data(item) => {
-                    let item = <ENP as EventsNodeProcessor>::process(&item);
+                    let item = <ENP as EventsNodeProcessor>::process(item);
                     Ok(StreamItem::DataItem(RangeCompletableItem::Data(item)))
                 }
                 RangeCompletableItem::RangeComplete => Ok(StreamItem::DataItem(RangeCompletableItem::RangeComplete)),
@@ -129,7 +126,8 @@ where
             StreamItem::Stats(item) => Ok(StreamItem::Stats(item)),
         },
         Err(e) => Err(e),
-    });
+    })
+    .map(|item| Box::new(item) as Box<dyn Framable>);
     Box::pin(s2)
 }
 
@@ -192,6 +190,7 @@ macro_rules! pipe1 {
     ($nty:expr, $end:expr, $shape:expr, $agg_kind:expr, $event_blobs:expr) => {
         match $nty {
             ScalarType::I32 => pipe2!(i32, $end, $shape, $agg_kind, $event_blobs),
+            _ => err::todoval(),
         }
     };
 }
@@ -290,7 +289,8 @@ async fn events_conn_handler_inner_try(
         // The writeout does not need to be generic.
         let mut p1 = pipe1!(entry.scalar_type, entry.byte_order, shape, evq.agg_kind, event_blobs);
         while let Some(item) = p1.next().await {
-            match make_frame(&item) {
+            let item = item.make_frame();
+            match item {
                 Ok(buf) => match netout.write_all(&buf).await {
                     Ok(_) => {}
                     Err(e) => return Err((e, netout))?,