diff --git a/archive/pfs/Dockerfile b/archive/pfs/Dockerfile
new file mode 100644
index 0000000..5984a5f
--- /dev/null
+++ b/archive/pfs/Dockerfile
@@ -0,0 +1,30 @@
+FROM ubuntu:latest
+
+RUN apt-get update --fix-missing
+RUN apt-get -y upgrade
+RUN apt-get -y install wget git bash unzip
+
+WORKDIR /tmp
+RUN wget https://dl.google.com/go/go1.14.linux-amd64.tar.gz
+RUN tar -xvf go1.14.linux-amd64.tar.gz
+RUN mv go /usr/local
+RUN rm go1.14.linux-amd64.tar.gz
+
+ENV GOROOT=/usr/local/go
+ENV GOPATH=/src/go
+ENV GOBIN=$GOPATH/bin
+ENV PATH=$GOBIN:$GOROOT/bin:$PATH
+
+RUN go get -u google.golang.org/grpc
+
+WORKDIR /src/protoc
+RUN wget https://github.com/protocolbuffers/protobuf/releases/download/v3.11.4/protoc-3.11.4-linux-x86_64.zip
+RUN unzip protoc-3.11.4-linux-x86_64.zip
+RUN rm protoc-3.11.4-linux-x86_64.zip
+ENV PATH=/src/protoc/bin:$PATH
+
+RUN go get -u github.com/golang/protobuf/protoc-gen-go
+RUN go get -u google.golang.org/protobuf/encoding/prototext
+RUN go get -u github.com/google/uuid
+
+WORKDIR /src/go/src/github.com/giolekva/pcloud/pfs
diff --git a/archive/pfs/api/api.proto b/archive/pfs/api/api.proto
new file mode 100644
index 0000000..56a8e9e
--- /dev/null
+++ b/archive/pfs/api/api.proto
@@ -0,0 +1,132 @@
+syntax = "proto3";
+
+package pcloud.api;
+
+option go_package = "api";
+
+enum ChunkStatus {
+     NEW = 0;
+     CREATED = 1;
+     WRITING = 2;
+     REPLICATING = 3;
+     READY = 4;
+}
+
+enum ReplicaRole {
+     SECONDARY = 0;
+     PRIMARY = 1;
+}
+
+// ChunkStorage
+
+service ChunkStorage {
+	rpc ListChunks(ListChunksRequest) returns (ListChunksResponse) {}
+
+	rpc CreateChunk(CreateChunkRequest) returns (CreateChunkResponse) {}
+
+	rpc GetChunkStatus(GetChunkStatusRequest) returns (GetChunkStatusResponse) {}
+
+	rpc ReadChunk(ReadChunkRequest) returns (ReadChunkResponse) {}
+
+	rpc WriteChunk(WriteChunkRequest) returns (WriteChunkResponse) {}
+
+	rpc RemoveChunk(RemoveChunkRequest) returns (RemoveChunkResponse) {}
+}
+
+message ListChunksRequest {
+}
+
+message ListChunksResponse {
+	repeated string chunk_id = 1;
+}
+
+message CreateChunkRequest {
+	string chunk_id = 1;
+	int32 size = 2;
+	ReplicaRole role = 3;
+	string primary_address = 4;
+}
+
+message CreateChunkResponse {
+}
+
+message GetChunkStatusRequest {
+	string chunk_id = 1;
+}
+
+message GetChunkStatusResponse {
+	ChunkStatus status = 1;
+	int32 total_bytes = 2;
+	int32 committed_bytes = 3;	
+}
+
+message ReadChunkRequest {
+	string chunk_id = 1;
+	int32 offset = 2;
+	int32 num_bytes = 3;
+}
+
+message ReadChunkResponse {
+	bytes data = 1;
+}
+
+message WriteChunkRequest {
+	string chunk_id = 1;
+	int32 offset = 2;
+	bytes data = 3;
+}
+
+message WriteChunkResponse {
+	int32 bytes_written = 1;
+}
+
+message RemoveChunkRequest {
+	string chunk_id = 1;
+}
+
+message RemoveChunkResponse {
+}
+
+// MetadataStorage
+
+message ChunkStorageMetadata {
+	string chunk_id = 1;
+	int32 size_bytes = 2;
+	repeated string server = 3;
+}
+
+service MetadataStorage {
+	rpc AddChunkServer(AddChunkServerRequest) returns (AddChunkServerResponse) {}
+	
+	rpc CreateBlob(CreateBlobRequest) returns (CreateBlobResponse) {}
+
+	rpc GetBlobMetadata(GetBlobMetadataRequest) returns (GetBlobMetadataResponse) {}
+}
+
+message AddChunkServerRequest {
+	string address = 1;
+}
+
+message AddChunkServerResponse {
+}
+
+message CreateBlobRequest {
+	int32 size_bytes = 1;
+	int32 chunk_size_bytes = 2;
+	int32 num_replicas = 3;
+}
+
+message CreateBlobResponse {
+	string blob_id = 1;
+	repeated ChunkStorageMetadata chunk = 2;
+}
+
+message GetBlobMetadataRequest {
+	string blob_id = 1;
+}
+
+message GetBlobMetadataResponse {
+	string blob_id = 1;
+	int32 size_bytes = 2;
+	repeated ChunkStorageMetadata chunk = 3;
+}
\ No newline at end of file
diff --git a/archive/pfs/api/client.go b/archive/pfs/api/client.go
new file mode 100644
index 0000000..3e05de6
--- /dev/null
+++ b/archive/pfs/api/client.go
@@ -0,0 +1,12 @@
+package api
+
+import (
+	"google.golang.org/grpc"
+)
+
+func DialConn(address string) (*grpc.ClientConn, error) {
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithBlock())
+	return grpc.Dial(address, opts...)
+}
diff --git a/archive/pfs/chunk/chunk.go b/archive/pfs/chunk/chunk.go
new file mode 100644
index 0000000..aaa1bfb
--- /dev/null
+++ b/archive/pfs/chunk/chunk.go
@@ -0,0 +1,23 @@
+package chunk
+
+import (
+	"io"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type ChunkInfo struct {
+	Status    api.ChunkStatus
+	Size      int
+	Committed int
+}
+
+type Chunk interface {
+	Stats() (ChunkInfo, error)
+	ReaderAt() io.ReaderAt
+	WriterAt() io.WriterAt
+}
+
+type ChunkFactory interface {
+	New(size int) Chunk
+}
diff --git a/archive/pfs/chunk/file.go b/archive/pfs/chunk/file.go
new file mode 100644
index 0000000..3502a50
--- /dev/null
+++ b/archive/pfs/chunk/file.go
@@ -0,0 +1,49 @@
+package chunk
+
+import (
+	"io"
+	"os"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type ReadOnlyFileChunk struct {
+	f      *os.File
+	offset int
+	size   int
+}
+
+func NewReadOnlyFileChunk(f *os.File, offset, size int) Chunk {
+	return &ReadOnlyFileChunk{f, offset, size}
+}
+
+func (c *ReadOnlyFileChunk) Stats() (ChunkInfo, error) {
+	return ChunkInfo{
+		Status:    api.ChunkStatus_READY,
+		Size:      c.size,
+		Committed: c.size}, nil
+}
+
+func (c *ReadOnlyFileChunk) ReaderAt() io.ReaderAt {
+	return &fileReader{c.f}
+}
+
+func (c *ReadOnlyFileChunk) WriterAt() io.WriterAt {
+	return &fileWriter{c.f}
+}
+
+type fileReader struct {
+	f *os.File
+}
+
+func (f *fileReader) ReadAt(b []byte, offset int64) (int, error) {
+	return f.f.ReadAt(b, offset)
+}
+
+type fileWriter struct {
+	f *os.File
+}
+
+func (f *fileWriter) WriteAt(b []byte, offset int64) (int, error) {
+	return f.f.WriteAt(b, offset)
+}
diff --git a/archive/pfs/chunk/in_memory.go b/archive/pfs/chunk/in_memory.go
new file mode 100644
index 0000000..b9b55ec
--- /dev/null
+++ b/archive/pfs/chunk/in_memory.go
@@ -0,0 +1,68 @@
+package chunk
+
+import (
+	"bytes"
+	"errors"
+	"io"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type InMemoryChunk struct {
+	status    api.ChunkStatus
+	payload   []byte
+	committed int
+}
+
+func (c *InMemoryChunk) Stats() (ChunkInfo, error) {
+	return ChunkInfo{c.status, len(c.payload), c.committed}, nil
+}
+
+func (c *InMemoryChunk) ReaderAt() io.ReaderAt {
+	return bytes.NewReader(c.payload[:c.committed])
+}
+
+func (c *InMemoryChunk) WriterAt() io.WriterAt {
+	return &byteWriter{c}
+}
+
+type byteWriter struct {
+	c *InMemoryChunk
+}
+
+func (w *byteWriter) WriteAt(p []byte, offset int64) (n int, err error) {
+	if int(offset) > w.c.committed {
+		panic(1)
+		return 0, errors.New("Gaps are not allowed when writing in chunks")
+	}
+	if int(offset) < w.c.committed {
+		if int(offset)+len(p) <= w.c.committed {
+			if bytes.Compare(w.c.payload[int(offset):int(offset)+len(p)], p) != 0 {
+				panic(2)
+				return 0, errors.New("Can not change contents of allready committed chunk bytes")
+			}
+			panic(3)
+			return len(p), nil
+		}
+		n = w.c.committed - int(offset)
+		p = p[n:]
+		offset = int64(w.c.committed)
+	}
+	if w.c.committed+len(p) > len(w.c.payload) {
+		panic(4)
+		return 0, errors.New("In memory chunk does not have enough space available")
+	}
+	n += copy(w.c.payload[w.c.committed:], p)
+	w.c.committed += n
+	return
+}
+
+type InMemoryChunkFactory struct {
+}
+
+func (f InMemoryChunkFactory) New(size int) Chunk {
+	return &InMemoryChunk{
+		status:    api.ChunkStatus_CREATED,
+		payload:   make([]byte, size),
+		committed: 0}
+}
diff --git a/archive/pfs/chunk/in_memory_test.go b/archive/pfs/chunk/in_memory_test.go
new file mode 100644
index 0000000..b9711ca
--- /dev/null
+++ b/archive/pfs/chunk/in_memory_test.go
@@ -0,0 +1,27 @@
+package chunk
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestConcurrentReads(t *testing.T) {
+	c := InMemoryChunkFactory{}.New(4)
+	if _, err := c.WriterAt().WriteAt([]byte("abcd"), 0); err != nil {
+		panic(err)
+	}
+	d1 := make([]byte, 2)
+	d2 := make([]byte, 3)
+	if _, err := c.ReaderAt().ReadAt(d1, 0); err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(d1, []byte("ab")) != 0 {
+		t.Errorf("Expected: %s\nActual: %s", "ab", d1)
+	}
+	if _, err := c.ReaderAt().ReadAt(d2, 0); err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(d2, []byte("abc")) != 0 {
+		t.Errorf("Expected: %s\nActual: %s", "abc", d2)
+	}
+}
diff --git a/archive/pfs/chunk/remote.go b/archive/pfs/chunk/remote.go
new file mode 100644
index 0000000..6d84241
--- /dev/null
+++ b/archive/pfs/chunk/remote.go
@@ -0,0 +1,74 @@
+package chunk
+
+import (
+	"context"
+	"io"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type RemoteChunk struct {
+	chunkId string
+	client  api.ChunkStorageClient
+}
+
+func (r *RemoteChunk) Stats() (info ChunkInfo, err error) {
+	resp, err := r.client.GetChunkStatus(
+		context.Background(),
+		&api.GetChunkStatusRequest{ChunkId: r.chunkId})
+	if err != nil {
+		return
+	}
+	info = ChunkInfo{
+		resp.Status,
+		int(resp.TotalBytes),
+		int(resp.CommittedBytes)}
+	return
+}
+
+func (r *RemoteChunk) ReaderAt() io.ReaderAt {
+	return &remoteChunkReaderAt{
+		chunkId: r.chunkId,
+		client:  r.client}
+}
+
+func (r *RemoteChunk) WriterAt() io.WriterAt {
+	return &remoteChunkWriterAt{
+		chunkId: r.chunkId,
+		client:  r.client}
+}
+
+type remoteChunkReaderAt struct {
+	chunkId string
+	client  api.ChunkStorageClient
+}
+
+func (c *remoteChunkReaderAt) ReadAt(p []byte, offset int64) (n int, err error) {
+	req := api.ReadChunkRequest{
+		ChunkId:  c.chunkId,
+		Offset:   int32(offset),
+		NumBytes: int32(len(p))}
+	resp, err := c.client.ReadChunk(context.Background(), &req)
+	if err != nil {
+		return
+	}
+	n = copy(p, resp.Data)
+	return
+}
+
+type remoteChunkWriterAt struct {
+	chunkId string
+	client  api.ChunkStorageClient
+}
+
+func (c *remoteChunkWriterAt) WriteAt(p []byte, offset int64) (n int, err error) {
+	req := api.WriteChunkRequest{
+		ChunkId: c.chunkId,
+		Offset:  int32(offset),
+		Data:    p}
+	resp, err := c.client.WriteChunk(context.Background(), &req)
+	if resp != nil {
+		n = int(resp.BytesWritten)
+	}
+	return
+}
diff --git a/archive/pfs/chunk/replicator.go b/archive/pfs/chunk/replicator.go
new file mode 100644
index 0000000..d8990a7
--- /dev/null
+++ b/archive/pfs/chunk/replicator.go
@@ -0,0 +1,116 @@
+package chunk
+
+import (
+	"context"
+	"io"
+
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type ReplicaAssignmentChangeListener interface {
+	Primary(chunkId, currentPrimary string) <-chan string
+}
+
+type PrimaryReplicaChangeListener interface {
+	ChunkId() string
+	Address() <-chan string
+}
+
+type NonChangingReplicaAssignment struct {
+}
+
+func (l *NonChangingReplicaAssignment) Primary(chunkId, address string) <-chan string {
+	ch := make(chan string, 1)
+	ch <- address
+	return ch
+}
+
+func replicate(ctx context.Context, dst, src Chunk, done chan<- int) {
+	dstInfo, err := dst.Stats()
+	if err != nil {
+		panic(err)
+	}
+	inp := src.ReaderAt()
+	replicated := dstInfo.Committed
+	out := dst.WriterAt()
+	for {
+		select {
+		default:
+			p := make([]byte, 100)
+			n, err := inp.ReadAt(p, int64(replicated))
+			if n > 0 {
+				m, _ := out.WriteAt(p[:n], int64(replicated))
+				replicated += m
+			}
+			if err == io.EOF {
+				done <- 1
+				return
+			}
+
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func ReplicateFromPrimary(ctx context.Context, chunkId string, dst Chunk, primaryAddressCh <-chan string) {
+	var done chan int
+	var cancel context.CancelFunc = nil
+	for {
+		select {
+		case <-done:
+			return
+		case <-ctx.Done():
+			return
+		case address := <-primaryAddressCh:
+			if cancel != nil {
+				cancel()
+			}
+			var opts []grpc.DialOption
+			opts = append(opts, grpc.WithInsecure())
+			opts = append(opts, grpc.WithBlock())
+			conn, err := grpc.Dial(address, opts...)
+			if err == nil {
+				continue
+			}
+			client := api.NewChunkStorageClient(conn)
+			src := RemoteChunk{chunkId, client}
+			replicatorCtx, cancelFn := context.WithCancel(context.Background())
+			cancel = cancelFn
+			done = make(chan int, 1)
+			go replicate(replicatorCtx, dst, &src, done)
+		}
+	}
+}
+
+func WriteToPrimary(ctx context.Context, chunkId string, src Chunk, primaryAddressCh <-chan string) {
+	var done chan int
+	var cancel context.CancelFunc = nil
+	for {
+		select {
+		case <-done:
+			return
+		case <-ctx.Done():
+			return
+		case address := <-primaryAddressCh:
+			if cancel != nil {
+				cancel()
+			}
+			var opts []grpc.DialOption
+			opts = append(opts, grpc.WithInsecure())
+			opts = append(opts, grpc.WithBlock())
+			conn, err := grpc.Dial(address, opts...)
+			if err != nil {
+				continue
+			}
+			client := api.NewChunkStorageClient(conn)
+			dst := RemoteChunk{chunkId, client}
+			replicatorCtx, cancelFn := context.WithCancel(context.Background())
+			cancel = cancelFn
+			done = make(chan int, 1)
+			go replicate(replicatorCtx, &dst, src, done)
+		}
+	}
+}
diff --git a/archive/pfs/chunk/server.go b/archive/pfs/chunk/server.go
new file mode 100644
index 0000000..d619f13
--- /dev/null
+++ b/archive/pfs/chunk/server.go
@@ -0,0 +1,123 @@
+package chunk
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"sync"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type ChunkServer struct {
+	factory             ChunkFactory
+	assignmentChangeLis ReplicaAssignmentChangeListener
+	chunks              sync.Map
+	replicatorCancel    sync.Map
+}
+
+func NewChunkServer(factory ChunkFactory,
+	assignmentChangeLis ReplicaAssignmentChangeListener) *ChunkServer {
+	return &ChunkServer{
+		factory:             factory,
+		assignmentChangeLis: assignmentChangeLis}
+}
+
+func (s *ChunkServer) ListChunks(
+	ctx context.Context,
+	req *api.ListChunksRequest) (resp *api.ListChunksResponse, err error) {
+	resp = &api.ListChunksResponse{}
+	s.chunks.Range(func(k, v interface{}) bool {
+		resp.ChunkId = append(resp.ChunkId, k.(string))
+		return true
+	})
+	return
+}
+
+func (s *ChunkServer) CreateChunk(
+	ctx context.Context,
+	req *api.CreateChunkRequest) (resp *api.CreateChunkResponse, err error) {
+	chunk := s.factory.New(int(req.Size))
+	s.chunks.Store(req.ChunkId, chunk)
+	switch req.Role {
+	case api.ReplicaRole_SECONDARY:
+		ctx, cancel := context.WithCancel(context.Background())
+		s.replicatorCancel.Store(req.ChunkId, cancel)
+		primaryAddressCh := s.assignmentChangeLis.Primary(
+			req.ChunkId, req.PrimaryAddress)
+		go ReplicateFromPrimary(ctx, req.ChunkId, chunk, primaryAddressCh)
+	case api.ReplicaRole_PRIMARY:
+		{
+		}
+	}
+	resp = &api.CreateChunkResponse{}
+	log.Printf("Created chunk: %s\n", req.ChunkId)
+	return
+
+}
+
+func (s *ChunkServer) GetChunkStatus(
+	ctx context.Context,
+	req *api.GetChunkStatusRequest) (resp *api.GetChunkStatusResponse, err error) {
+	if chunk, ok := s.chunks.Load(req.ChunkId); ok {
+		c := chunk.(Chunk)
+		var info ChunkInfo
+		info, err = c.Stats()
+		if err != nil {
+			return
+		}
+		resp = &api.GetChunkStatusResponse{
+			Status:         info.Status,
+			TotalBytes:     int32(info.Size),
+			CommittedBytes: int32(info.Committed)}
+		return
+	}
+	return nil, fmt.Errorf("Could not fund chunk: %s", req.ChunkId)
+}
+
+func (s *ChunkServer) ReadChunk(
+	ctx context.Context,
+	req *api.ReadChunkRequest) (resp *api.ReadChunkResponse, err error) {
+	if value, ok := s.chunks.Load(req.ChunkId); ok {
+		chunk := value.(Chunk)
+		b := make([]byte, req.NumBytes)
+		var n int
+		n, err = chunk.ReaderAt().ReadAt(b, int64(req.Offset))
+		if n == 0 {
+			return
+		}
+		return &api.ReadChunkResponse{Data: b[:n]}, nil
+
+	} else {
+		return nil, fmt.Errorf("Chunk not found: %s", req.ChunkId)
+	}
+}
+
+func (s *ChunkServer) WriteChunk(
+	ctx context.Context,
+	req *api.WriteChunkRequest) (resp *api.WriteChunkResponse, err error) {
+	if value, ok := s.chunks.Load(req.ChunkId); ok {
+		chunk := value.(Chunk)
+		var n int
+		n, err = chunk.WriterAt().WriteAt(req.Data, int64(req.Offset))
+		if n == 0 {
+			return
+		}
+		return &api.WriteChunkResponse{BytesWritten: int32(n)}, nil
+
+	} else {
+		return nil, fmt.Errorf("Chunk not found: %s", req.ChunkId)
+	}
+}
+
+func (s *ChunkServer) RemoveChunk(
+	ctx context.Context,
+	req *api.RemoveChunkRequest) (resp *api.RemoveChunkResponse, err error) {
+	if cancel, ok := s.replicatorCancel.Load(req.ChunkId); ok {
+		cancel.(context.CancelFunc)()
+		s.replicatorCancel.Delete(req.ChunkId)
+	}
+	s.chunks.Delete(req.ChunkId)
+	return &api.RemoveChunkResponse{}, nil
+}
diff --git a/archive/pfs/chunk/server_test.go b/archive/pfs/chunk/server_test.go
new file mode 100644
index 0000000..9549a06
--- /dev/null
+++ b/archive/pfs/chunk/server_test.go
@@ -0,0 +1,103 @@
+package chunk
+
+import (
+	"bytes"
+	"context"
+	"testing"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+func TestStoreChunk(t *testing.T) {
+	s := ChunkServer{factory: &InMemoryChunkFactory{}}
+	_, err := s.CreateChunk(context.Background(), &api.CreateChunkRequest{
+		ChunkId: "foo",
+		Size:    11,
+		Role:    api.ReplicaRole_PRIMARY})
+	if err != nil {
+		t.Error(err)
+	}
+	_, err = s.WriteChunk(context.Background(), &api.WriteChunkRequest{
+		ChunkId: "foo",
+		Offset:  0,
+		Data:    []byte("hello world")})
+	if err != nil {
+		t.Error(err)
+	}
+}
+
+func TestStoreAndReadChunk(t *testing.T) {
+	s := ChunkServer{factory: &InMemoryChunkFactory{}}
+	_, err := s.CreateChunk(context.Background(), &api.CreateChunkRequest{
+		ChunkId: "foo",
+		Size:    11,
+		Role:    api.ReplicaRole_PRIMARY})
+	if err != nil {
+		t.Error(err)
+	}
+	_, err = s.WriteChunk(context.Background(), &api.WriteChunkRequest{
+		ChunkId: "foo",
+		Offset:  0,
+		Data:    []byte("hello world")})
+	if err != nil {
+		t.Error(err)
+	}
+	resp, err := s.ReadChunk(context.Background(), &api.ReadChunkRequest{
+		ChunkId:  "foo",
+		NumBytes: 100})
+	if err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(resp.Data, []byte("hello world")) != 0 {
+		t.Errorf("Expected: %s\nGot: %s\n", "hello world", resp.Data)
+	}
+}
+
+func TestReadWithOffsets(t *testing.T) {
+	s := ChunkServer{factory: &InMemoryChunkFactory{}}
+	_, err := s.CreateChunk(context.Background(), &api.CreateChunkRequest{
+		ChunkId: "foo",
+		Size:    11,
+		Role:    api.ReplicaRole_PRIMARY})
+	if err != nil {
+		t.Error(err)
+	}
+	_, err = s.WriteChunk(context.Background(), &api.WriteChunkRequest{
+		ChunkId: "foo",
+		Offset:  0,
+		Data:    []byte("hello world")})
+	if err != nil {
+		t.Error(err)
+	}
+	resp, err := s.ReadChunk(context.Background(), &api.ReadChunkRequest{
+		ChunkId:  "foo",
+		Offset:   0,
+		NumBytes: 2})
+	if err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(resp.Data, []byte("he")) != 0 {
+		t.Errorf("Expected: %s\nGot: %s\n", "he", resp.Data)
+	}
+	resp, err = s.ReadChunk(context.Background(), &api.ReadChunkRequest{
+		ChunkId:  "foo",
+		Offset:   2,
+		NumBytes: 2})
+	if err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(resp.Data, []byte("ll")) != 0 {
+		t.Errorf("Expected: %s\nGot: %s\n", "ll", resp.Data)
+	}
+	resp, err = s.ReadChunk(context.Background(), &api.ReadChunkRequest{
+		ChunkId:  "foo",
+		Offset:   4,
+		NumBytes: 100})
+	if err != nil {
+		t.Error(err)
+	}
+	if bytes.Compare(resp.Data, []byte("o world")) != 0 {
+		t.Errorf("Expected: %s\nGot: %s\n", "o world", resp.Data)
+	}
+
+}
diff --git a/archive/pfs/chunk_server.go b/archive/pfs/chunk_server.go
new file mode 100644
index 0000000..04a266e
--- /dev/null
+++ b/archive/pfs/chunk_server.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"time"
+
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+	"github.com/giolekva/pcloud/pfs/chunk"
+)
+
+var controllerAddress = flag.String("controller", "localhost:123", "Metadata storage address.")
+var selfAddress = flag.String("self", "", "Metadata storage address.")
+
+func main() {
+	flag.Parse()
+	log.Print("Chunk server starting")
+
+	// Create Master server client.
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithBlock())
+	conn, err := grpc.Dial(*controllerAddress, opts...)
+	if err != nil {
+		log.Fatalf("Failed to dial %s: %v", *controllerAddress, err)
+	}
+	defer conn.Close()
+	client := api.NewMetadataStorageClient(conn)
+
+	// Register current Chunk server with Master.
+	ctx, _ := context.WithTimeout(context.Background(), 5*time.Second)
+	_, err = client.AddChunkServer(
+		ctx,
+		&api.AddChunkServerRequest{Address: *selfAddress})
+	if err != nil {
+		log.Fatalf("failed to register chunk server: %v", err)
+	}
+	log.Print("Registered myself")
+
+	// Start RPC server
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", 234))
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	server := grpc.NewServer()
+	api.RegisterChunkStorageServer(server, chunk.NewChunkServer(
+		&chunk.InMemoryChunkFactory{},
+		&chunk.NonChangingReplicaAssignment{}))
+	server.Serve(lis)
+}
diff --git a/archive/pfs/client.go b/archive/pfs/client.go
new file mode 100644
index 0000000..2abb47f
--- /dev/null
+++ b/archive/pfs/client.go
@@ -0,0 +1,36 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"os"
+
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+	"github.com/giolekva/pcloud/pfs/client"
+)
+
+var controllerAddress = flag.String("controller", "localhost:123", "Metadata storage address.")
+var fileToUpload = flag.String("file", "", "File path to upload.")
+
+func main() {
+	flag.Parse()
+
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithBlock())
+	conn, err := grpc.Dial(*controllerAddress, opts...)
+	if err != nil {
+		log.Fatalf("Failed to dial %s: %v", *controllerAddress, err)
+	}
+	defer conn.Close()
+	uploader := client.NewFileUploader(api.NewMetadataStorageClient(conn))
+
+	f, err := os.Open(*fileToUpload)
+	if err != nil {
+		panic(err)
+	}
+
+	uploader.Upload(f)
+}
diff --git a/archive/pfs/client/client.go b/archive/pfs/client/client.go
new file mode 100644
index 0000000..a8492a3
--- /dev/null
+++ b/archive/pfs/client/client.go
@@ -0,0 +1,43 @@
+package client
+
+import (
+	"context"
+	"os"
+
+	"github.com/giolekva/pcloud/pfs/api"
+	"github.com/giolekva/pcloud/pfs/chunk"
+)
+
+type FileUploader struct {
+	client api.MetadataStorageClient
+}
+
+func NewFileUploader(client api.MetadataStorageClient) *FileUploader {
+	return &FileUploader{client}
+}
+
+func (fu *FileUploader) Upload(f *os.File, numReplicas int) {
+	info, err := f.Stat()
+	if err != nil {
+		return
+	}
+	resp, err := fu.client.CreateBlob(
+		context.Background(), &api.CreateBlobRequest{
+			SizeBytes:   int32(info.Size()),
+			NumReplicas: int32(numReplicas)})
+	if err != nil {
+		panic(err)
+	}
+	if len(resp.Chunk) != 1 {
+		panic(resp)
+	}
+	lis := &chunk.NonChangingReplicaAssignment{}
+	primaryAddressCh := lis.Primary(
+		resp.Chunk[0].ChunkId,
+		resp.Chunk[0].Server[0])
+	chunk.WriteToPrimary(
+		context.Background(),
+		resp.Chunk[0].ChunkId,
+		chunk.NewReadOnlyFileChunk(f, 0, int(info.Size())),
+		primaryAddressCh)
+}
diff --git a/archive/pfs/client/client_test.go b/archive/pfs/client/client_test.go
new file mode 100644
index 0000000..b9f3002
--- /dev/null
+++ b/archive/pfs/client/client_test.go
@@ -0,0 +1,62 @@
+package client
+
+import (
+	"os"
+	"testing"
+
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+	pt "github.com/giolekva/pcloud/pfs/testing"
+)
+
+func TestUploadSmallFile(t *testing.T) {
+	env, err := pt.NewInMemoryEnv(1)
+	if err != nil {
+		t.Error(err)
+	}
+	defer env.Stop()
+
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithBlock())
+	conn, err := grpc.Dial("unix:///tmp/pcloud/controller", opts...)
+	if err != nil {
+		t.Error(err)
+	}
+	defer conn.Close()
+	client := api.NewMetadataStorageClient(conn)
+
+	uploader := NewFileUploader(client)
+	f, err := os.Open("testdata/foo")
+	if err != nil {
+		t.Error(err)
+	}
+	uploader.Upload(f, 1)
+
+}
+
+func TestUploadSmallFileWithReplication(t *testing.T) {
+	env, err := pt.NewInMemoryEnv(3)
+	if err != nil {
+		t.Error(err)
+	}
+	defer env.Stop()
+
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithBlock())
+	conn, err := grpc.Dial("unix:///tmp/pcloud/controller", opts...)
+	if err != nil {
+		t.Error(err)
+	}
+	defer conn.Close()
+	client := api.NewMetadataStorageClient(conn)
+
+	uploader := NewFileUploader(client)
+	f, err := os.Open("testdata/foo")
+	if err != nil {
+		t.Error(err)
+	}
+	uploader.Upload(f, 2)
+}
diff --git a/archive/pfs/client/testdata/foo b/archive/pfs/client/testdata/foo
new file mode 100644
index 0000000..257cc56
--- /dev/null
+++ b/archive/pfs/client/testdata/foo
@@ -0,0 +1 @@
+foo
diff --git a/archive/pfs/controller/chunk.go b/archive/pfs/controller/chunk.go
new file mode 100644
index 0000000..5fb694f
--- /dev/null
+++ b/archive/pfs/controller/chunk.go
@@ -0,0 +1,18 @@
+package controller
+
+import (
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type chunkServerStatus int
+
+const (
+	Healthy chunkServerStatus = iota
+	UNREACHABLE
+)
+
+type chunkServer struct {
+	address string
+	status  chunkServerStatus
+	chunks  map[string]api.ChunkStatus
+}
diff --git a/archive/pfs/controller/server.go b/archive/pfs/controller/server.go
new file mode 100644
index 0000000..885ad55
--- /dev/null
+++ b/archive/pfs/controller/server.go
@@ -0,0 +1,116 @@
+package controller
+
+import (
+	"context"
+	"log"
+	"math/rand"
+
+	"github.com/google/uuid"
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+)
+
+type chunkServers struct {
+	address string
+}
+
+type BlobStatus int
+
+const (
+	NEW BlobStatus = iota
+)
+
+type ChunkStatus int
+
+const (
+	ASSIGNED ChunkStatus = iota
+	STORED
+)
+
+type chunkReplica struct {
+	chunkServer string
+	status      ChunkStatus
+}
+
+type chunk struct {
+	id      string
+	replica []chunkReplica
+}
+
+type blob struct {
+	id     string
+	status BlobStatus
+	chunks []chunk
+}
+
+type MasterServer struct {
+	chunkServers []*chunkServer
+	blobs        []*blob
+}
+
+func NewMasterServer() *MasterServer {
+	return &MasterServer{}
+}
+
+func (s *MasterServer) AddChunkServer(
+	ctx context.Context,
+	req *api.AddChunkServerRequest) (*api.AddChunkServerResponse, error) {
+	s.chunkServers = append(s.chunkServers, &chunkServer{
+		address: req.Address,
+		status:  Healthy})
+	log.Printf("Registered Chunk server: %s", req.Address)
+	return &api.AddChunkServerResponse{}, nil
+}
+
+func (s *MasterServer) CreateBlob(
+	ctx context.Context,
+	req *api.CreateBlobRequest) (*api.CreateBlobResponse, error) {
+	if int(req.NumReplicas) > len(s.chunkServers) {
+		return nil, nil
+	}
+	resp := api.CreateBlobResponse{
+		BlobId: uuid.New().String(),
+		Chunk: []*api.ChunkStorageMetadata{
+			{ChunkId: uuid.New().String()},
+		}}
+	assigned := 0
+	chunkId := resp.Chunk[0].ChunkId
+	for i := range rand.Perm(len(s.chunkServers)) {
+		if assigned == int(req.NumReplicas) {
+			break
+		}
+		address := s.chunkServers[i].address
+		log.Printf(address)
+		var opts []grpc.DialOption
+		opts = append(opts, grpc.WithInsecure())
+		opts = append(opts, grpc.WithBlock())
+		conn, err := grpc.Dial(address, opts...)
+		if err != nil {
+			continue
+		}
+		defer conn.Close()
+		client := api.NewChunkStorageClient(conn)
+		createChunkReq := api.CreateChunkRequest{
+			ChunkId: chunkId,
+			Size:    req.SizeBytes}
+		if assigned == 0 {
+			createChunkReq.Role = api.ReplicaRole_PRIMARY
+		} else {
+			createChunkReq.Role = api.ReplicaRole_SECONDARY
+			createChunkReq.PrimaryAddress = resp.Chunk[0].Server[0]
+		}
+		_, err = client.CreateChunk(ctx, &createChunkReq)
+		if err == nil {
+			resp.Chunk[0].Server = append(resp.Chunk[0].Server, address)
+			assigned++
+		}
+	}
+	return &resp, nil
+}
+
+func (s *MasterServer) GetBlobMetadata(
+	ctx context.Context,
+	req *api.GetBlobMetadataRequest) (*api.GetBlobMetadataResponse, error) {
+	return nil, nil
+}
diff --git a/archive/pfs/controller_server.go b/archive/pfs/controller_server.go
new file mode 100644
index 0000000..c905ba3
--- /dev/null
+++ b/archive/pfs/controller_server.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net"
+
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+	"github.com/giolekva/pcloud/pfs/controller"
+)
+
+var port = flag.Int("port", 123, "Port to listen on.")
+
+func main() {
+	flag.Parse()
+	log.Print("Master server starting")
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		log.Fatalf("Failed to listen on port %d: %v", *port, err)
+	}
+	log.Printf("Listening on port: %d", *port)
+	server := grpc.NewServer()
+	api.RegisterMetadataStorageServer(server, controller.NewMasterServer())
+	log.Print("Master serving")
+	server.Serve(lis)
+}
diff --git a/archive/pfs/pfs.yamls b/archive/pfs/pfs.yamls
new file mode 100644
index 0000000..ba06bcb
--- /dev/null
+++ b/archive/pfs/pfs.yamls
@@ -0,0 +1,78 @@
+---
+kind: Service 
+apiVersion: v1
+metadata:
+  name: pfs-controller-service
+spec:
+  type: ClusterIP
+  selector:
+    app: pfs-controller 
+  ports:
+    - nodePort: 
+      port: 111
+      targetPort: 123
+---
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  name: pfs-controller
+spec:
+  selector:
+    matchLabels:
+      app: pfs-controller
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: pfs-controller
+    spec:
+      containers:
+      - name: pfs-controller
+        image: pcloud:latest
+        imagePullPolicy: Never
+        ports:
+        - containerPort: 123
+        volumeMounts:
+        - name: code
+          mountPath: /src/go/src/github.com/giolekva/pcloud/pfs
+        command: ["/bin/sh"]
+        args: ["-c", "protoc api/api.proto --go_out=plugins=grpc:. && go run controller_server.go --port=123"]
+      volumes:
+      - name: code
+        hostPath:
+          path: "/Users/lekva/dev/go/src/github.com/giolekva/pcloud/pfs"
+---
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  name: pfs-chunk
+spec:
+  selector:
+    matchLabels:
+      app: pfs-chunk
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: pfs-chunk
+    spec:
+      containers:
+      - name: pfs-chunk
+        image: pcloud:latest
+        imagePullPolicy: Never
+        ports:
+        - containerPort: 234
+        env:
+        - name: SELF_IP
+          valueFrom:
+            fieldRef:
+              fieldPath: status.podIP
+        volumeMounts:
+        - name: code
+          mountPath: /src/go/src/github.com/giolekva/pcloud/pfs
+        command: ["/bin/sh"]
+        args: ["-c", "protoc api/api.proto --go_out=plugins=grpc:. && go run chunk_server.go --controller=pfs-controller-service:111 --self=$(SELF_IP):234"]
+      volumes:
+      - name: code
+        hostPath:
+          path: "/Users/lekva/dev/go/src/github.com/giolekva/pcloud/pfs"
diff --git a/archive/pfs/testing/in_memory_env.go b/archive/pfs/testing/in_memory_env.go
new file mode 100644
index 0000000..c3410be
--- /dev/null
+++ b/archive/pfs/testing/in_memory_env.go
@@ -0,0 +1,84 @@
+package testing
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"syscall"
+	"time"
+
+	"google.golang.org/grpc"
+
+	"github.com/giolekva/pcloud/pfs/api"
+	"github.com/giolekva/pcloud/pfs/chunk"
+	"github.com/giolekva/pcloud/pfs/controller"
+)
+
+type InMemoryEnv struct {
+	m          *grpc.Server
+	c          []*grpc.Server
+	controllerConn *grpc.ClientConn
+}
+
+func NewInMemoryEnv(numChunkServers int) (*InMemoryEnv, error) {
+	env := new(InMemoryEnv)
+	syscall.Unlink("/tmp/pcloud/controller")
+	lis, err := net.Listen("unix", "/tmp/pcloud/controller")
+	if err != nil {
+		return nil, err
+	}
+	server := grpc.NewServer()
+	api.RegisterMetadataStorageServer(server, controller.NewMasterServer())
+	go server.Serve(lis)
+
+	var opts []grpc.DialOption
+	opts = append(opts, grpc.WithInsecure())
+	opts = append(opts, grpc.WithBlock())
+	conn, err := grpc.Dial("unix:/tmp/pcloud/controller", opts...)
+	if err != nil {
+		return nil, err
+	}
+	env.controllerConn = conn
+	client := api.NewMetadataStorageClient(conn)
+
+	env.c = make([]*grpc.Server, numChunkServers)
+	for i := 0; i < numChunkServers; i++ {
+		unixSocket := fmt.Sprintf("/tmp/pcloud/chunk-%d", i)
+		syscall.Unlink(unixSocket)
+		lis, err := net.Listen("unix", unixSocket)
+		if err != nil {
+			return nil, err
+		}
+		server := grpc.NewServer()
+		api.RegisterChunkStorageServer(server, chunk.NewChunkServer(
+			&chunk.InMemoryChunkFactory{},
+			&chunk.NonChangingReplicaAssignment{}))
+		go server.Serve(lis)
+		env.c[i] = server
+	}
+
+	for i := 0; i < numChunkServers; i++ {
+		ctx, _ := context.WithTimeout(context.Background(), 5*time.Second)
+		_, err = client.AddChunkServer(
+			ctx,
+			&api.AddChunkServerRequest{Address: fmt.Sprintf("unix:///tmp/pcloud/chunk-%d", i)})
+		if err != nil {
+			return nil, err
+		}
+	}
+	return env, nil
+}
+
+func (e *InMemoryEnv) Stop() {
+	if e.controllerConn != nil {
+		e.controllerConn.Close()
+	}
+	for _, s := range e.c {
+		if s != nil {
+			s.GracefulStop()
+		}
+	}
+	if e.m != nil {
+		e.m.GracefulStop()
+	}
+}
diff --git a/archive/pfs/testing/simple_test.go b/archive/pfs/testing/simple_test.go
new file mode 100644
index 0000000..d8e2510
--- /dev/null
+++ b/archive/pfs/testing/simple_test.go
@@ -0,0 +1,13 @@
+package testing
+
+import (
+	"testing"
+)
+
+func TestSetup(t *testing.T) {
+	env, err := NewInMemoryEnv(3)
+	if err != nil {
+		t.Error(err)
+	}
+	defer env.Stop()
+}