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dagstore_test.go
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package dagstore
import (
"context"
"crypto/rand"
"errors"
"fmt"
"io"
"os"
"strconv"
"testing"
"time"
"github.com/multiformats/go-multihash"
"github.com/ipfs/go-datastore"
dsq "github.com/ipfs/go-datastore/query"
dssync "github.com/ipfs/go-datastore/sync"
logging "github.com/ipfs/go-log/v2"
"github.com/stretchr/testify/require"
"golang.org/x/sync/errgroup"
"github.com/filecoin-project/dagstore/index"
"github.com/filecoin-project/dagstore/mount"
"github.com/filecoin-project/dagstore/shard"
"github.com/filecoin-project/dagstore/testdata"
)
var (
carv2mnt = &mount.FSMount{FS: testdata.FS, Path: testdata.FSPathCarV2}
junkmnt = &mount.FSMount{FS: testdata.FS, Path: testdata.FSPathJunk}
)
func init() {
_ = logging.SetLogLevel("dagstore", "DEBUG")
}
// TestDestroyShard tests that shards are removed properly and relevant
// errors are returned in case of failure.
func TestDestroyShard(t *testing.T) {
dir := t.TempDir()
store := datastore.NewLogDatastore(dssync.MutexWrap(datastore.NewMapDatastore()), "trace")
shardRepo := NewBadgerShardRepo(store)
sink := tracer(128)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
ShardRepo: shardRepo,
TraceCh: sink,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
sh := []string{"foo", "bar"}
for _, v := range sh {
ch := make(chan ShardResult, 1)
k := shard.KeyFromString(v)
counting := &mount.Counting{Mount: carv2mnt}
err = dagst.RegisterShard(context.Background(), k, counting, ch, RegisterOpts{
LazyInitialization: false,
})
require.NoError(t, err)
res1 := <-ch
require.NoError(t, res1.Error)
info, err := dagst.GetShardInfo(k)
require.NoError(t, err)
require.Equal(t, ShardStateAvailable, info.ShardState)
}
// Acquire one shard and keep other Available
acres := make(chan ShardResult, 1)
err = dagst.AcquireShard(context.Background(), shard.KeyFromString(sh[0]), acres, AcquireOpts{})
require.NoError(t, err)
res := <-acres
require.NoError(t, res.Error)
// Try to destroy both shards, fail for any error except Active Shards
desres1 := make(chan ShardResult, 1)
err = dagst.DestroyShard(context.Background(), shard.KeyFromString(sh[0]), desres1, DestroyOpts{})
require.NoError(t, err)
res1 := <-desres1
require.Contains(t, res1.Error.Error(), "failed to destroy shard; active references")
desres2 := make(chan ShardResult, 1)
err = dagst.DestroyShard(context.Background(), shard.KeyFromString(sh[1]), desres2, DestroyOpts{})
require.NoError(t, err)
res2 := <-desres2
require.NoError(t, res2.Error)
info := dagst.AllShardsInfo()
require.Equal(t, 1, len(info))
}
func TestDestroyAcrossRestart(t *testing.T) {
dir := t.TempDir()
store := datastore.NewLogDatastore(dssync.MutexWrap(datastore.NewMapDatastore()), "trace")
shardRepo := NewBadgerShardRepo(store)
idx, err := index.NewFSRepo(t.TempDir())
require.NoError(t, err)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
ShardRepo: shardRepo,
IndexRepo: idx,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
keys := registerShards(t, dagst, 100, carv2mnt, RegisterOpts{})
res, err := store.Query(context.TODO(), dsq.Query{})
require.NoError(t, err)
entries, err := res.Rest()
require.NoError(t, err)
require.Len(t, entries, 100) // we have 100 shards.
// Remove 20 shards
for _, j := range keys[20:40] {
desres := make(chan ShardResult, 1)
err = dagst.DestroyShard(context.Background(), j, desres, DestroyOpts{})
require.NoError(t, err)
res := <-desres
require.NoError(t, res.Error)
}
// close the DAG store.
err = dagst.Close()
require.NoError(t, err)
// create a new dagstore with the same datastore.
dagst, err = NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
ShardRepo: shardRepo,
IndexRepo: idx,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
// Compare the number of shards after restart
info := dagst.AllShardsInfo()
l := len(info)
t.Log(l)
require.Len(t, info, 80)
}
func TestRegisterUsingExistingTransient(t *testing.T) {
ds := datastore.NewMapDatastore()
shardRepo := NewBadgerShardRepo(ds)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: shardRepo,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
// even though the fs mount has an empty path, the existing transient will get us through registration.
err = dagst.RegisterShard(context.Background(), k, &mount.FSMount{FS: testdata.FS, Path: ""}, ch, RegisterOpts{ExistingTransient: testdata.RootPathCarV2})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
require.EqualValues(t, k, res.Key)
require.Nil(t, res.Accessor)
idx, err := dagst.indices.GetFullIndex(k)
require.NoError(t, err)
require.NotNil(t, idx)
}
func TestRegisterWithaNilResponseChannel(t *testing.T) {
ds := datastore.NewMapDatastore()
shardRepo := NewBadgerShardRepo(ds)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: shardRepo,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
k := shard.KeyFromString("foo")
// we pass a nil response channel to Register Shard here
err = dagst.RegisterShard(context.Background(), k, &mount.FSMount{FS: testdata.FS, Path: testdata.FSPathCarV1}, nil, RegisterOpts{})
require.NoError(t, err)
// acquire and wait for acquire
ch := make(chan ShardResult, 1)
err = dagst.AcquireShard(context.Background(), k, ch, AcquireOpts{})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
require.NotNil(t, res.Accessor)
require.EqualValues(t, k, res.Accessor.Shard())
err = res.Accessor.Close()
require.NoError(t, err)
// verify index has been persisted
istat, err := dagst.indices.StatFullIndex(k)
require.NoError(t, err)
require.True(t, istat.Exists)
}
func TestRegisterCarV1(t *testing.T) {
ds := datastore.NewMapDatastore()
shardRepo := NewBadgerShardRepo(ds)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: shardRepo,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
err = dagst.RegisterShard(context.Background(), k, &mount.FSMount{FS: testdata.FS, Path: testdata.FSPathCarV1}, ch, RegisterOpts{})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
require.EqualValues(t, k, res.Key)
require.Nil(t, res.Accessor)
info := dagst.AllShardsInfo()
require.Len(t, info, 1)
for _, ss := range info {
require.Equal(t, ShardStateAvailable, ss.ShardState)
require.NoError(t, ss.Error)
}
// verify index has been persisted
istat, err := dagst.indices.StatFullIndex(k)
require.NoError(t, err)
require.True(t, istat.Exists)
}
func TestRegisterCarV2(t *testing.T) {
ctx := context.Background()
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: NewBadgerShardRepo(datastore.NewMapDatastore()),
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
err = dagst.RegisterShard(context.Background(), k, carv2mnt, ch, RegisterOpts{})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
require.EqualValues(t, k, res.Key)
require.Nil(t, res.Accessor)
info := dagst.AllShardsInfo()
require.Len(t, info, 1)
for _, ss := range info {
require.Equal(t, ShardStateAvailable, ss.ShardState)
require.NoError(t, ss.Error)
}
istat, err := dagst.indices.StatFullIndex(k)
require.NoError(t, err)
require.True(t, istat.Exists)
// ensure it's registered with the correct iterable index and has been indexed in the top-level index
ii, err := dagst.GetIterableIndex(k)
require.NoError(t, err)
require.NotNil(t, ii)
err = ii.ForEach(func(h multihash.Multihash, _ uint64) error {
k2, err := dagst.ShardsContainingMultihash(ctx, h)
if err != nil {
return err
}
if len(k2) != 1 {
return errors.New("should match only one pieceCid")
}
if k2[0] != k {
return errors.New("not the correct key")
}
return nil
})
require.NoError(t, err)
}
func TestRegisterConcurrentShards(t *testing.T) {
run := func(t *testing.T, n int) {
store := dssync.MutexWrap(datastore.NewMapDatastore())
shardRepo := NewBadgerShardRepo(store)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: shardRepo,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
registerShards(t, dagst, n, carv2mnt, RegisterOpts{})
}
t.Run("1", func(t *testing.T) { run(t, 1) })
t.Run("2", func(t *testing.T) { run(t, 2) })
t.Run("4", func(t *testing.T) { run(t, 4) })
t.Run("8", func(t *testing.T) { run(t, 8) })
t.Run("16", func(t *testing.T) { run(t, 16) })
t.Run("32", func(t *testing.T) { run(t, 32) })
}
func TestAcquireInexistentShard(t *testing.T) {
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: NewBadgerShardRepo(datastore.NewMapDatastore()),
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
err = dagst.AcquireShard(context.Background(), k, ch, AcquireOpts{})
require.Error(t, err)
}
func TestAcquireAfterRegisterWait(t *testing.T) {
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
ShardRepo: NewBadgerShardRepo(datastore.NewMapDatastore()),
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
err = dagst.RegisterShard(context.Background(), k, carv2mnt, ch, RegisterOpts{})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
err = dagst.AcquireShard(context.Background(), k, ch, AcquireOpts{})
require.NoError(t, err)
res = <-ch
require.NoError(t, res.Error)
require.NotNil(t, res.Accessor)
require.EqualValues(t, k, res.Accessor.Shard())
err = res.Accessor.Close()
require.NoError(t, err)
}
func TestConcurrentAcquires(t *testing.T) {
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: t.TempDir(),
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
err = dagst.RegisterShard(context.Background(), k, carv2mnt, ch, RegisterOpts{})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
// the test consists of acquiring then releasing.
run := func(t *testing.T, n int) {
accessors := acquireShard(t, dagst, k, n)
releaseAll(t, dagst, k, accessors)
}
t.Run("1", func(t *testing.T) { run(t, 1) })
t.Run("2", func(t *testing.T) { run(t, 2) })
t.Run("4", func(t *testing.T) { run(t, 4) })
t.Run("8", func(t *testing.T) { run(t, 8) })
t.Run("16", func(t *testing.T) { run(t, 16) })
t.Run("32", func(t *testing.T) { run(t, 32) })
t.Run("64", func(t *testing.T) { run(t, 64) })
t.Run("128", func(t *testing.T) { run(t, 128) })
t.Run("256", func(t *testing.T) { run(t, 256) })
info := dagst.AllShardsInfo()
require.Len(t, info, 1)
for _, ss := range info {
require.Equal(t, ShardStateAvailable, ss.ShardState)
require.NoError(t, ss.Error)
}
}
func TestRestartRestoresState(t *testing.T) {
dir := t.TempDir()
store := datastore.NewLogDatastore(dssync.MutexWrap(datastore.NewMapDatastore()), "trace")
shardRepo := NewBadgerShardRepo(store)
idx, err := index.NewFSRepo(t.TempDir())
require.NoError(t, err)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
ShardRepo: shardRepo,
IndexRepo: idx,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
keys := registerShards(t, dagst, 100, carv2mnt, RegisterOpts{})
for _, k := range keys[0:20] { // acquire the first 20 keys.
_ = acquireShard(t, dagst, k, 4)
}
res, err := store.Query(context.TODO(), dsq.Query{})
require.NoError(t, err)
entries, err := res.Rest()
require.NoError(t, err)
require.Len(t, entries, 100) // we have 100 shards.
// close the DAG store.
err = dagst.Close()
require.NoError(t, err)
// create a new dagstore with the same datastore.
dagst, err = NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
ShardRepo: shardRepo,
IndexRepo: idx,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
info := dagst.AllShardsInfo()
require.Len(t, info, 100)
for k, ss := range info {
require.Equal(t, ShardStateAvailable, ss.ShardState)
require.NoError(t, ss.Error)
require.Zero(t, ss.refs)
// also ensure we have indices for all the shards.
idx, err := dagst.indices.GetFullIndex(k)
require.NoError(t, err)
require.NotNil(t, idx)
// ensure we can acquire the shard again
_ = acquireShard(t, dagst, k, 10)
// ensure we can't register the shard again
err = dagst.RegisterShard(context.Background(), k, carv2mnt, nil, RegisterOpts{})
require.Error(t, err)
require.Contains(t, err.Error(), ErrShardExists.Error())
}
}
func TestRestartResumesRegistration(t *testing.T) {
dir := t.TempDir()
store := datastore.NewLogDatastore(dssync.MutexWrap(datastore.NewMapDatastore()), "trace")
shardRepo := NewBadgerShardRepo(store)
r := testRegistry(t)
err := r.Register("block", newBlockingMount(&mount.FSMount{FS: testdata.FS}))
require.NoError(t, err)
sink := tracer(128)
dagst, err := NewDAGStore(Config{
MountRegistry: r,
TransientsDir: dir,
ShardRepo: shardRepo,
TraceCh: sink,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
// start registering a shard -> registration will not complete as mount.Fetch will hang.
k := shard.KeyFromString("test")
ch := make(chan ShardResult, 1)
block := newBlockingMount(carv2mnt)
err = dagst.RegisterShard(context.Background(), k, block, ch, RegisterOpts{})
require.NoError(t, err)
// receive at most two traces in 1 second.
traces := make([]Trace, 16)
n, timedOut := sink.Read(traces, 1*time.Second)
require.Equal(t, 2, n)
require.True(t, timedOut)
// no OpMakeAvailable trace; shard state is initializing.
require.Equal(t, OpShardRegister, traces[0].Op)
require.Equal(t, ShardStateNew, traces[0].After.ShardState)
require.Equal(t, OpShardInitialize, traces[1].Op)
require.Equal(t, ShardStateInitializing, traces[1].After.ShardState)
// corroborate we see the same through the API.
info, err := dagst.GetShardInfo(k)
require.NoError(t, err)
require.EqualValues(t, ShardStateInitializing, info.ShardState)
t.Log("closing")
// close the dagstore and remove the transients.
err = dagst.Close()
require.NoError(t, err)
// start a new DAGStore and do not block the fetch this time -> registration should work.
// create a new dagstore with the same datastore.
//
// Instantiate a new registry using a blocking mount that we control as
// a template. Because UnblockCh is exported, it is a templated field, so
// all mounts will await for tokens on that shared channel.
r = testRegistry(t)
bm := newBlockingMount(&mount.FSMount{FS: testdata.FS})
err = r.Register("block", bm)
require.NoError(t, err)
// unblock the mount this time!
bm.UnblockNext(1)
dagst, err = NewDAGStore(Config{
MountRegistry: r,
TransientsDir: dir,
ShardRepo: shardRepo,
TraceCh: sink,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
// this time we will receive three traces; OpShardInitialize, and OpShardMakeAvailable.
n, timedOut = sink.Read(traces, 1*time.Second)
require.Equal(t, 3, n)
require.True(t, timedOut)
// trace 1.
require.Equal(t, OpShardRegister, traces[0].Op)
require.Equal(t, ShardStateNew, traces[0].After.ShardState)
// trace 2.
require.Equal(t, OpShardInitialize, traces[1].Op)
require.Equal(t, ShardStateInitializing, traces[1].After.ShardState)
// trace 3.
require.Equal(t, OpShardMakeAvailable, traces[2].Op)
require.Equal(t, ShardStateAvailable, traces[2].After.ShardState)
// ensure we have indices.
idx, err := dagst.indices.GetFullIndex(k)
require.NoError(t, err)
require.NotNil(t, idx)
// now let's acquire the shard, and ensure we receive two more traces.
// one for OpAcquire, one for OpRelease.
accessors := acquireShard(t, dagst, k, 1)
releaseAll(t, dagst, k, accessors)
n, timedOut = sink.Read(traces, 1*time.Second)
require.Equal(t, 2, n)
require.True(t, timedOut)
// trace 1.
require.Equal(t, OpShardAcquire, traces[0].Op)
require.Equal(t, ShardStateServing, traces[0].After.ShardState)
// trace 2.
require.Equal(t, OpShardRelease, traces[1].Op)
require.Equal(t, ShardStateAvailable, traces[1].After.ShardState)
}
func TestGC(t *testing.T) {
dir := t.TempDir()
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
// register 100 shards
// acquire 25 with 5 acquirers, release 2 acquirers (refcount 3); non reclaimable
// acquire another 25, release them all, they're reclaimable
shards := registerShards(t, dagst, 100, carv2mnt, RegisterOpts{})
for _, k := range shards[0:25] {
accessors := acquireShard(t, dagst, k, 5)
for _, acc := range accessors[:2] {
err := acc.Close()
require.NoError(t, err)
}
}
for _, k := range shards[25:50] {
accessors := acquireShard(t, dagst, k, 5)
releaseAll(t, dagst, k, accessors)
}
results, err := dagst.GC(context.Background())
require.NoError(t, err)
require.Len(t, results.Shards, 75) // all but the second batch of 25 have been reclaimed.
require.Zero(t, results.ShardFailures())
for i := 25; i < 100; i++ {
k := shard.KeyFromString(fmt.Sprintf("shard-%d", i))
err, ok := results.Shards[k]
require.True(t, ok)
require.NoError(t, err)
}
}
func TestOrphansRemovedOnStartup(t *testing.T) {
dir := t.TempDir()
// create random files in the transients directory, which we expect the GC
// procedure to remove.
var orphaned []string
for i := 0; i < 100; i++ {
file, err := os.CreateTemp(dir, "")
require.NoError(t, err)
orphaned = append(orphaned, file.Name())
// write random data
n, err := io.Copy(file, io.LimitReader(rand.Reader, 1024))
require.NoError(t, err)
require.EqualValues(t, 1024, n)
err = file.Close()
require.NoError(t, err)
}
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
})
require.NoError(t, err)
defer dagst.Close()
err = dagst.Start(context.Background())
require.NoError(t, err)
// orphaned files are gone
for _, p := range orphaned {
_, err := os.Stat(p)
require.ErrorIs(t, err, os.ErrNotExist)
}
}
// TestLazyInitialization tests that lazy initialization initializes shards on
// their first acquisition.
func TestLazyInitialization(t *testing.T) {
dir := t.TempDir()
store := datastore.NewLogDatastore(dssync.MutexWrap(datastore.NewMapDatastore()), "trace")
shardRepo := NewBadgerShardRepo(store)
sink := tracer(128)
dagst, err := NewDAGStore(Config{
MountRegistry: testRegistry(t),
TransientsDir: dir,
ShardRepo: shardRepo,
TraceCh: sink,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
ch := make(chan ShardResult, 1)
k := shard.KeyFromString("foo")
counting := &mount.Counting{Mount: carv2mnt}
err = dagst.RegisterShard(context.Background(), k, counting, ch, RegisterOpts{
LazyInitialization: true,
})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
info, err := dagst.GetShardInfo(k)
require.NoError(t, err)
require.Equal(t, ShardStateNew, info.ShardState)
// we haven't tried to fetch the resource.
require.Zero(t, counting.Count())
t.Log("now acquiring")
// do 16 simultaneous acquires.
acquireShard(t, dagst, k, 16)
// verify that we've fetched the shard only once.
require.Equal(t, 1, counting.Count())
info, err = dagst.GetShardInfo(k)
require.NoError(t, err)
require.Equal(t, ShardStateServing, info.ShardState)
require.EqualValues(t, 16, info.refs)
}
// TestThrottleFetch exercises and tests the fetch concurrency limitation.
// Testing thottling on indexing is way harder...
func TestThrottleFetch(t *testing.T) {
r := testRegistry(t)
err := r.Register("block", newBlockingMount(&mount.FSMount{FS: testdata.FS}))
require.NoError(t, err)
dir := t.TempDir()
sink := tracer(128)
dagst, err := NewDAGStore(Config{
MountRegistry: r,
TransientsDir: dir,
TraceCh: sink,
MaxConcurrentReadyFetches: 5,
MaxConcurrentIndex: 5,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
// register 16 shards with lazy init, against the blocking mount.
// we don't register with eager, because we would block due to the throttle.
mnt := newBlockingMount(carv2mnt)
mnt.ready = true
cnt := &mount.Counting{Mount: mnt}
resCh := make(chan ShardResult, 16)
for i := 0; i < 16; i++ {
k := shard.KeyFromString(strconv.Itoa(i))
err := dagst.RegisterShard(context.Background(), k, cnt, resCh, RegisterOpts{})
require.NoError(t, err)
}
time.Sleep(500 * time.Millisecond)
info := dagst.AllShardsInfo()
require.Len(t, info, 16)
for _, i := range info {
require.Equal(t, ShardStateInitializing, i.ShardState)
}
// no responses received.
require.Len(t, resCh, 0)
// mount was called 5 times only.
require.EqualValues(t, 5, cnt.Count())
// allow 5 to proceed; those will be initialized an the next 5 will block.
mnt.UnblockNext(5)
time.Sleep(500 * time.Millisecond)
// five responses received.
require.Len(t, resCh, 5)
// mount was called another 5 times.
require.EqualValues(t, 10, cnt.Count())
info = dagst.AllShardsInfo()
require.Len(t, info, 16)
m := map[ShardState][]shard.Key{}
for k, i := range info {
m[i.ShardState] = append(m[i.ShardState], k)
}
require.Len(t, m, 2) // only two shard states.
require.Len(t, m[ShardStateInitializing], 16-5)
require.Len(t, m[ShardStateAvailable], 5)
}
func TestIndexingFailure(t *testing.T) {
r := testRegistry(t)
dir := t.TempDir()
sink := tracer(128)
failures := make(chan ShardResult, 128)
dagst, err := NewDAGStore(Config{
MountRegistry: r,
TransientsDir: dir,
TraceCh: sink,
FailureCh: failures,
})
require.NoError(t, err)
err = dagst.Start(context.Background())
require.NoError(t, err)
// register 16 shards with junk in them, so they will fail indexing.
resCh := make(chan ShardResult, 16)
junkmnt := *junkmnt // take a copy
for i := 0; i < 16; i++ {
k := shard.KeyFromString(strconv.Itoa(i))
err := dagst.RegisterShard(context.Background(), k, &junkmnt, resCh, RegisterOpts{})
require.NoError(t, err)
}
time.Sleep(500 * time.Millisecond)
// 16 failures were notified.
require.Len(t, failures, 16)
for i := 0; i < 16; i++ {
f := <-failures
require.Error(t, f.Error)
res := <-resCh
require.Error(t, res.Error)
}
info := dagst.AllShardsInfo()
for _, i := range info {
require.Equal(t, ShardStateErrored, i.ShardState)
require.Error(t, i.Error)
}
evts := make([]Trace, 48)
n, timedOut := sink.Read(evts, 50*time.Millisecond)
require.False(t, timedOut)
require.Equal(t, 48, n)
// first 48 events are OpShardRegister, OpShardInitialize, OpShardFail.
for i := 0; i < 48; i++ {
evt := evts[i]
switch evt.Op {
case OpShardRegister:
require.EqualValues(t, ShardStateNew, evt.After.ShardState)
require.NoError(t, evt.After.Error)
case OpShardInitialize:
require.EqualValues(t, ShardStateInitializing, evt.After.ShardState)
require.NoError(t, evt.After.Error)
case OpShardFail:
require.EqualValues(t, ShardStateErrored, evt.After.ShardState)
require.Error(t, evt.After.Error)
default:
t.Fatalf("unexpected op: %s", evt.Op)
}
}
t.Run("fails again", func(t *testing.T) {
// continue using a bad path.
junkmnt.Path = testdata.FSPathJunk
// try to recover, it will fail again.
for i := 0; i < 16; i++ {
k := shard.KeyFromString(strconv.Itoa(i))
err := dagst.RecoverShard(context.Background(), k, resCh, RecoverOpts{})
require.NoError(t, err)
}
time.Sleep(500 * time.Millisecond)
// 16 failures were notified.
require.Len(t, failures, 16)
for i := 0; i < 16; i++ {
f := <-failures
require.Error(t, f.Error)
res := <-resCh
require.Error(t, res.Error)
}
info := dagst.AllShardsInfo()
for k, i := range info {
require.Equal(t, ShardStateErrored, i.ShardState)
require.Error(t, i.Error)
// no index
istat, err := dagst.indices.StatFullIndex(k)
require.NoError(t, err)
require.False(t, istat.Exists)
}
// verify that all acquires fail immediately.
for k := range dagst.AllShardsInfo() {
ch := make(chan ShardResult)
err := dagst.AcquireShard(context.Background(), k, ch, AcquireOpts{})
require.NoError(t, err)
res := <-ch
require.Error(t, res.Error)
require.Equal(t, k, res.Key)
require.Nil(t, res.Accessor)
}
evts := make([]Trace, 48)
n, timedOut := sink.Read(evts, 50*time.Millisecond)
require.False(t, timedOut)
require.Equal(t, 48, n)
// these 48 traces are OpShardRecover, OpShardFail, OpShardAcquire.
for i := 0; i < 48; i++ {
evt := evts[i]
switch evt.Op {
case OpShardRecover:
require.EqualValues(t, ShardStateRecovering, evt.After.ShardState)
require.Error(t, evt.After.Error)
case OpShardFail:
require.EqualValues(t, ShardStateErrored, evt.After.ShardState)
require.Error(t, evt.After.Error)
case OpShardAcquire:
require.EqualValues(t, ShardStateErrored, evt.After.ShardState)
require.Error(t, evt.After.Error)
default:
t.Fatalf("unexpected op: %s", evt.Op)
}
}
})
t.Run("recovers", func(t *testing.T) {
// use a good path.
junkmnt.Path = testdata.FSPathCarV2
// try to recover, it will succeed.
for i := 0; i < 16; i++ {
k := shard.KeyFromString(strconv.Itoa(i))
err := dagst.RecoverShard(context.Background(), k, resCh, RecoverOpts{})
require.NoError(t, err)
}
// no need to wait, since the recovery channel will fire when the shard
// is actually recovered.
// time.Sleep(500 * time.Millisecond)
// 0 failures were notified.
require.Len(t, failures, 0)
for i := 0; i < 16; i++ {
res := <-resCh
require.NoError(t, res.Error)
}
info := dagst.AllShardsInfo()
for k, i := range info {
require.Equal(t, ShardStateAvailable, i.ShardState)
require.NoError(t, i.Error)
// an index exists!
istat, err := dagst.indices.StatFullIndex(k)
require.NoError(t, err)
require.True(t, istat.Exists)
}
// verify that all acquires succeed now.
for k := range dagst.AllShardsInfo() {
ch := make(chan ShardResult)
err := dagst.AcquireShard(context.Background(), k, ch, AcquireOpts{})
require.NoError(t, err)
res := <-ch
require.NoError(t, res.Error)
require.Equal(t, k, res.Key)
require.NotNil(t, res.Accessor)
}
evts := make([]Trace, 48)
n, timedOut := sink.Read(evts, 50*time.Millisecond)
require.False(t, timedOut)
require.Equal(t, 48, n)
// these 48 traces are OpShardRecover, OpShardFail.
for i := 0; i < 48; i++ {
evt := evts[i]
switch evt.Op {
case OpShardRecover:
require.EqualValues(t, ShardStateRecovering, evt.After.ShardState)
require.Error(t, evt.After.Error)
case OpShardMakeAvailable: