diff --git a/Makefile b/Makefile
index 145f0af2..10b8a14a 100644
--- a/Makefile
+++ b/Makefile
@@ -78,7 +78,7 @@ test_problem: deps
 
 $(sharness):
 	@echo "Downloading sharness"
-	@wget -q -O sharness/lib/sharness.tar.gz http://github.com/chriscool/sharness/archive/master.tar.gz
+	@curl -L -s -o sharness/lib/sharness.tar.gz http://github.com/chriscool/sharness/archive/master.tar.gz
 	@cd sharness/lib; tar -zxf sharness.tar.gz; cd ../..
 	@mv sharness/lib/sharness-master sharness/lib/sharness
 	@rm sharness/lib/sharness.tar.gz
diff --git a/api/rest/client/request.go b/api/rest/client/request.go
index 43ce3423..28c1b38b 100644
--- a/api/rest/client/request.go
+++ b/api/rest/client/request.go
@@ -139,5 +139,4 @@ func (c *Client) handleStreamResponse(resp *http.Response, obj interface{}) ([]a
 			return outputs, fmt.Errorf("unexpected error code: %d", output.Code)
 		}
 	}
-	return outputs, nil
 }
diff --git a/api/rest/restapi.go b/api/rest/restapi.go
index ab3093eb..af86d173 100644
--- a/api/rest/restapi.go
+++ b/api/rest/restapi.go
@@ -22,7 +22,7 @@ import (
 	"time"
 
 	types "github.com/ipfs/ipfs-cluster/api"
-	importer "github.com/ipfs/ipfs-cluster/ipld-importer"
+	"github.com/ipfs/ipfs-cluster/importer"
 
 	mux "github.com/gorilla/mux"
 	rpc "github.com/hsanjuan/go-libp2p-gorpc"
diff --git a/cluster_test.go b/cluster_test.go
index ae5cb1b6..074ea446 100644
--- a/cluster_test.go
+++ b/cluster_test.go
@@ -13,7 +13,7 @@ import (
 	"github.com/ipfs/ipfs-cluster/consensus/raft"
 	"github.com/ipfs/ipfs-cluster/informer/numpin"
 	"github.com/ipfs/ipfs-cluster/pintracker/maptracker"
-	"github.com/ipfs/ipfs-cluster/shard"
+	"github.com/ipfs/ipfs-cluster/sharder"
 	"github.com/ipfs/ipfs-cluster/state/mapstate"
 	"github.com/ipfs/ipfs-cluster/test"
 
@@ -86,11 +86,11 @@ func (ipfs *mockConnector) SwarmPeers() (api.SwarmPeers, error) {
 	return []peer.ID{test.TestPeerID4, test.TestPeerID5}, nil
 }
 
-func (ipfs *mockConnector) ConnectSwarms() error                             { return nil }
-func (ipfs *mockConnector) ConfigKey(keypath string) (interface{}, error)    { return nil, nil }
-func (ipfs *mockConnector) FreeSpace() (uint64, error)                       { return 100, nil }
-func (ipfs *mockConnector) RepoSize() (uint64, error)                        { return 0, nil }
-func (ipfs *mockConnector) BlockPut(bwf api.BlockWithFormat) (string, error) { return "", nil }
+func (ipfs *mockConnector) ConnectSwarms() error                          { return nil }
+func (ipfs *mockConnector) ConfigKey(keypath string) (interface{}, error) { return nil, nil }
+func (ipfs *mockConnector) FreeSpace() (uint64, error)                    { return 100, nil }
+func (ipfs *mockConnector) RepoSize() (uint64, error)                     { return 0, nil }
+func (ipfs *mockConnector) BlockPut(bwf api.NodeWithMeta) (string, error) { return "", nil }
 
 func testingCluster(t *testing.T) (*Cluster, *mockAPI, *mockConnector, *mapstate.MapState, *maptracker.MapPinTracker) {
 	clusterCfg, _, _, consensusCfg, trackerCfg, bmonCfg, psmonCfg, _, sharderCfg := testingConfigs()
@@ -115,7 +115,7 @@ func testingCluster(t *testing.T) (*Cluster, *mockAPI, *mockConnector, *mapstate
 	numpinCfg := &numpin.Config{}
 	numpinCfg.Default()
 	inf, _ := numpin.NewInformer(numpinCfg)
-	sharder, _ := shard.NewSharder(sharderCfg)
+	sharder, _ := sharder.NewSharder(sharderCfg)
 
 	ReadyTimeout = consensusCfg.WaitForLeaderTimeout + 1*time.Second
 
diff --git a/ipld-importer/add.go b/importer/add.go
similarity index 100%
rename from ipld-importer/add.go
rename to importer/add.go
diff --git a/ipld-importer/import.go b/importer/import.go
similarity index 100%
rename from ipld-importer/import.go
rename to importer/import.go
diff --git a/ipld-importer/import_test.go b/importer/import_test.go
similarity index 100%
rename from ipld-importer/import_test.go
rename to importer/import_test.go
diff --git a/ipld-importer/outgoing-dagservice.go b/importer/outgoing-dagservice.go
similarity index 100%
rename from ipld-importer/outgoing-dagservice.go
rename to importer/outgoing-dagservice.go
diff --git a/ipld-importer/printing-dagservice.go b/importer/printing-dagservice.go
similarity index 100%
rename from ipld-importer/printing-dagservice.go
rename to importer/printing-dagservice.go
diff --git a/ipld-importer/testingData/A/alpha/contents-overview.txt b/importer/testingData/A/alpha/contents-overview.txt
similarity index 100%
rename from ipld-importer/testingData/A/alpha/contents-overview.txt
rename to importer/testingData/A/alpha/contents-overview.txt
diff --git a/ipld-importer/testingData/A/beta/lorem-ipsum-explained.io b/importer/testingData/A/beta/lorem-ipsum-explained.io
similarity index 100%
rename from ipld-importer/testingData/A/beta/lorem-ipsum-explained.io
rename to importer/testingData/A/beta/lorem-ipsum-explained.io
diff --git a/ipld-importer/testingData/A/file.txt b/importer/testingData/A/file.txt
similarity index 100%
rename from ipld-importer/testingData/A/file.txt
rename to importer/testingData/A/file.txt
diff --git a/ipld-importer/testingData/A/gamma/don-quixote.txt b/importer/testingData/A/gamma/don-quixote.txt
similarity index 100%
rename from ipld-importer/testingData/A/gamma/don-quixote.txt
rename to importer/testingData/A/gamma/don-quixote.txt
diff --git a/ipld-importer/testingData/B/emerson-essays.txt b/importer/testingData/B/emerson-essays.txt
similarity index 100%
rename from ipld-importer/testingData/B/emerson-essays.txt
rename to importer/testingData/B/emerson-essays.txt
diff --git a/ipld-importer/testingData/B/poor-richard.txt b/importer/testingData/B/poor-richard.txt
similarity index 100%
rename from ipld-importer/testingData/B/poor-richard.txt
rename to importer/testingData/B/poor-richard.txt
diff --git a/ipfs-cluster-ctl/main.go b/ipfs-cluster-ctl/main.go
index 5ecd4b90..d3f6820a 100644
--- a/ipfs-cluster-ctl/main.go
+++ b/ipfs-cluster-ctl/main.go
@@ -186,11 +186,12 @@ requires authorization. implies --https, which you can disable with --force-http
 			Name:  "add",
 			Usage: "ipfs-cluster-ctl add <path> ... add a file to ipfs via cluster",
 			Description: `
-Only works with file paths, no directories.  Recurisive adding not yet supported.  --shard flag not
-yet supported.  Eventually users would use this endpoint if they want the file to be sharded across the cluster.
-This is useful in the case several ipfs peers want to ingest the file and combined have enough space
-to host but no single peer's repo has the capacity for the entire file.  No stdin reading yet either, that
-is also TODO
+Only works with file paths, no directories.  Recurisive adding not yet 
+supported.  --shard flag not yet supported.  Eventually users would use this 
+endpoint if they want the file to be sharded across the cluster. This is useful
+in the case several ipfs peers want to ingest the file and combined have enough
+space to host but no single peer's repo has the capacity for the entire file.
+No stdin reading yet either, that is also TODO
 `,
 			Flags: []cli.Flag{
 				cli.BoolFlag{
@@ -210,12 +211,14 @@ is also TODO
 					Usage: "write no output",
 				},
 				cli.StringFlag{
-					Name:  "layout, L",
-					Usage: "Dag layout to use for dag generation.  Currently 'trickle' is the only option supported",
+					Name: "layout, L",
+					Usage: `Dag layout to use for dag generation.  Currently 'trickle' is the only option
+supported`,
 				},
 				cli.StringFlag{
-					Name:  "chunker, s",
-					Usage: "Chunking algorithm to use. Either fixed block size: 'size-<size>', or rabin chunker: 'rabin-<min>-<avg>-<max>'.  Default is 'size-262144'",
+					Name: "chunker, s",
+					Usage: `Chunking algorithm to use. Either fixed block size: 'size-<size>', or rabin 
+chunker: 'rabin-<min>-<avg>-<max>'.  Default is 'size-262144'`,
 				},
 				cli.BoolFlag{
 					Name:  "raw-leaves",
diff --git a/ipfsconn/ipfshttp/ipfshttp_test.go b/ipfsconn/ipfshttp/ipfshttp_test.go
index 52e00e3c..d32e829e 100644
--- a/ipfsconn/ipfshttp/ipfshttp_test.go
+++ b/ipfsconn/ipfshttp/ipfshttp_test.go
@@ -712,7 +712,7 @@ func TestBlockPut(t *testing.T) {
 	defer ipfs.Shutdown()
 
 	data := []byte(test.TestCid4Data)
-	resp, err := ipfs.BlockPut(api.BlockWithFormat{
+	resp, err := ipfs.BlockPut(api.NodeWithMeta{
 		Data:   data,
 		Format: "protobuf",
 	})
diff --git a/sharder/sharder_test.go b/sharder/sharder_test.go
index e7e3981e..3a0e603a 100644
--- a/sharder/sharder_test.go
+++ b/sharder/sharder_test.go
@@ -37,7 +37,7 @@ var nodeDataSet2 = [][]byte{[]byte(`Dag Node A`), []byte(`Dag Node B`), []byte(`
 // that verify a sequence of dag-nodes is correctly added with the right
 // metadata.
 type mockRPC struct {
-	orderedPuts map[int]api.BlockWithFormat
+	orderedPuts map[int]api.NodeWithMeta
 	Host        host.Host
 }
 
@@ -92,7 +92,7 @@ func (mock *mockRPC) Allocate(in api.AllocateInfo, out *[]peer.ID) error {
 }
 
 // Record the ordered sequence of BlockPut calls for later validation
-func (mock *mockRPC) IPFSBlockPut(in api.BlockWithFormat, out *string) error {
+func (mock *mockRPC) IPFSBlockPut(in api.NodeWithMeta, out *string) error {
 	mock.orderedPuts[len(mock.orderedPuts)] = in
 	return nil
 }
@@ -112,7 +112,7 @@ func (mock *mockRPC) Pin(in api.PinSerial, out *struct{}) error {
 // Create a new sharder and register a mock RPC for testing
 func testNewSharder(t *testing.T) (*Sharder, *mockRPC) {
 	mockRPC := &mockRPC{}
-	mockRPC.orderedPuts = make(map[int]api.BlockWithFormat)
+	mockRPC.orderedPuts = make(map[int]api.NodeWithMeta)
 	client := NewMockRPCClient(t, mockRPC)
 	cfg := &Config{
 		AllocSize: DefaultAllocSize,
@@ -132,7 +132,7 @@ func TestAddAndFinalizeShard(t *testing.T) {
 	// Create 3 ipld protobuf nodes and add to sharding session
 	nodes := make([]*dag.ProtoNode, 3)
 	cids := make([]string, 3)
-	sessionID := "testAddShard"
+	sessionID := ""
 	for i, data := range nodeDataSet1 {
 		nodes[i] = dag.NodeWithData(data)
 		nodes[i].SetPrefix(nil)
@@ -142,7 +142,7 @@ func TestAddAndFinalizeShard(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-		err = sharder.AddNode(size, nodes[i].RawData(), cids[i], sessionID)
+		sessionID, err = sharder.AddNode(size, nodes[i].RawData(), cids[i], sessionID)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -196,7 +196,7 @@ func linksContain(links []*ipld.Link, c string) bool {
 func verifyNodePuts(t *testing.T,
 	dataSet [][]byte,
 	cids []string,
-	orderedPuts map[int]api.BlockWithFormat,
+	orderedPuts map[int]api.NodeWithMeta,
 	toVerify []int) {
 	if len(cids) != len(toVerify) || len(dataSet) != len(toVerify) {
 		t.Error("Malformed verifyNodePuts arguments")
@@ -229,7 +229,7 @@ func verifyNodePuts(t *testing.T,
 	}
 }
 
-func cborDataToNode(t *testing.T, putInfo api.BlockWithFormat) ipld.Node {
+func cborDataToNode(t *testing.T, putInfo api.NodeWithMeta) ipld.Node {
 	if putInfo.Format != "cbor" {
 		t.Fatalf("Unexpected shard node format %s", putInfo.Format)
 	}
@@ -258,36 +258,34 @@ func TestInterleaveSessions(t *testing.T) {
 	nodes2 := make([]*dag.ProtoNode, 3)
 	cids2 := make([]string, 3)
 
-	sessionID1 := "interleave1"
-	sessionID2 := "interleave2"
+	sessionID1 := ""
+	sessionID2 := ""
 	for i := 0; i < 6; i++ {
-		var nodes []*dag.ProtoNode
-		var cids []string
-		var dataSet [][]byte
-		var sessionID string
-		if i%2 == 0 { // Add to session 1
-			nodes = nodes1
-			cids = cids1
-			dataSet = nodeDataSet1
-			sessionID = sessionID1
-		} else {
-			nodes = nodes2
-			cids = cids2
-			dataSet = nodeDataSet2
-			sessionID = sessionID2
-		}
 		j := i / 2
-		nodes[j] = dag.NodeWithData(dataSet[j])
-		nodes[j].SetPrefix(nil)
-		cids[j] = nodes[j].Cid().String()
-		size, err := nodes[j].Size()
-		if err != nil {
-			t.Fatal(err)
-		}
-		err = sharder.AddNode(size, nodes[j].RawData(), cids[j],
-			sessionID)
-		if err != nil {
-			t.Fatal(err)
+		if i%2 == 0 { // session 1
+			nodes1[j] = dag.NodeWithData(nodeDataSet1[j])
+			nodes1[j].SetPrefix(nil)
+			cids1[j] = nodes1[j].Cid().String()
+			size, err := nodes1[j].Size()
+			if err != nil {
+				t.Fatal(err)
+			}
+			sessionID1, err = sharder.AddNode(size, nodes1[j].RawData(), cids1[j], sessionID1)
+			if err != nil {
+				t.Fatal(err)
+			}
+		} else { // session 2
+			nodes2[j] = dag.NodeWithData(nodeDataSet2[j])
+			nodes2[j].SetPrefix(nil)
+			cids2[j] = nodes2[j].Cid().String()
+			size, err := nodes2[j].Size()
+			if err != nil {
+				t.Fatal(err)
+			}
+			sessionID2, err = sharder.AddNode(size, nodes2[j].RawData(), cids2[j], sessionID2)
+			if err != nil {
+				t.Fatal(err)
+			}
 		}
 	}
 	err := sharder.Finalize(sessionID1)
@@ -366,7 +364,7 @@ func TestManyLinks(t *testing.T) {
 	dataSet := getManyLinksDataSet(t)
 	nodes := make([]*dag.ProtoNode, len(dataSet))
 	cids := make([]string, len(dataSet))
-	sessionID := "testManyLinks"
+	sessionID := ""
 
 	for i, data := range dataSet {
 		nodes[i] = dag.NodeWithData(data)
@@ -376,7 +374,7 @@ func TestManyLinks(t *testing.T) {
 		if err != nil {
 			t.Fatal(err)
 		}
-		err = sharder.AddNode(size, nodes[i].RawData(), cids[i], sessionID)
+		sessionID, err = sharder.AddNode(size, nodes[i].RawData(), cids[i], sessionID)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -443,9 +441,60 @@ func TestManyLinks(t *testing.T) {
 }
 
 // Test that by adding in enough nodes multiple shard nodes will be created
-/*func TestMultipleShards(t *testing.T) {
+func TestMultipleShards(t *testing.T) {
 	sharder, mockRPC := testNewSharder(t)
-	sharder.allocSize = IPFSChunkSize + IPFSChunkSize / 2
+	sharder.allocSize = IPFSChunkSize + IPFSChunkSize/2
+	sharder.allocSize = uint64(300000)
+	nodes := make([]*dag.ProtoNode, 4)
+	cids := make([]string, 4)
+	sessionID := ""
 
+	for i := range nodes {
+		data := repeatData(90000, i)
+		nodes[i] = dag.NodeWithData(data)
+		nodes[i].SetPrefix(nil)
+		cids[i] = nodes[i].Cid().String()
+		size, err := nodes[i].Size()
+		if err != nil {
+			t.Fatal(err)
+		}
+		sessionID, err = sharder.AddNode(size, nodes[i].RawData(), cids[i], sessionID)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	err := sharder.Finalize(sessionID)
+	if err != nil {
+		t.Fatal(err)
+	}
 
-}*/
+	if len(mockRPC.orderedPuts) != len(nodes)+3 { //data nodes, 2 shard nodes, 1 root
+		t.Errorf("unexpected number of block puts called: %d", len(mockRPC.orderedPuts))
+	}
+
+	// First shard node contains first 3 cids
+	shardNode1 := cborDataToNode(t, mockRPC.orderedPuts[len(nodes)-1])
+	links := shardNode1.Links()
+	for _, c := range cids[:len(cids)-1] {
+		if !linksContain(links, c) {
+			t.Errorf("expected cid %s not in shard node", c)
+		}
+	}
+
+	// Second shard node only points to final cid
+	shardNode2 := cborDataToNode(t, mockRPC.orderedPuts[len(nodes)+1])
+	links = shardNode2.Links()
+	if len(links) != 1 || links[0].Cid.String() != cids[len(nodes)-1] {
+		t.Errorf("unexpected links in second shard node")
+	}
+}
+
+// repeatData takes in a byte value and a number of times this value should be
+// repeated and returns a byte slice of this value repeated
+func repeatData(byteCount int, digit int) []byte {
+	data := make([]byte, byteCount)
+	for i := range data {
+		data[i] = byte(digit)
+	}
+	return data
+}