+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
package main
import (
+ "context"
+ "encoding/json"
"fmt"
+ "runtime"
+ "sync"
+ "sync/atomic"
"time"
- "git.curoverse.com/arvados.git/sdk/go/arvados"
+ "git.arvados.org/arvados.git/sdk/go/arvados"
+ "github.com/jmoiron/sqlx"
)
func countCollections(c *arvados.Client, params arvados.ResourceListParams) (int, error) {
var page arvados.CollectionList
var zero int
params.Limit = &zero
- params.Count = true
+ params.Count = "exact"
err := c.RequestAndDecode(&page, "GET", "arvados/v1/collections", nil, params)
return page.ItemsAvailable, err
}
// The progress function is called periodically with done (number of
// times f has been called) and total (number of times f is expected
// to be called).
-//
-// If pageSize > 0 it is used as the maximum page size in each API
-// call; otherwise the maximum allowed page size is requested.
-func EachCollection(c *arvados.Client, pageSize int, f func(arvados.Collection) error, progress func(done, total int)) error {
+func EachCollection(ctx context.Context, db *sqlx.DB, c *arvados.Client, f func(arvados.Collection) error, progress func(done, total int)) error {
if progress == nil {
progress = func(_, _ int) {}
}
- expectCount, err := countCollections(c, arvados.ResourceListParams{})
+ expectCount, err := countCollections(c, arvados.ResourceListParams{
+ IncludeTrash: true,
+ IncludeOldVersions: true,
+ })
if err != nil {
return err
}
+ var newestModifiedAt time.Time
- limit := pageSize
- if limit <= 0 {
- // Use the maximum page size the server allows
- limit = 1<<31 - 1
- }
- params := arvados.ResourceListParams{
- Limit: &limit,
- Order: "modified_at, uuid",
- Count: false,
- Select: []string{"uuid", "manifest_text", "modified_at", "portable_data_hash", "replication_desired"},
+ rows, err := db.QueryxContext(ctx, `SELECT
+ uuid, manifest_text, modified_at, portable_data_hash,
+ replication_desired, replication_confirmed, replication_confirmed_at,
+ storage_classes_desired, storage_classes_confirmed, storage_classes_confirmed_at,
+ is_trashed
+ FROM collections`)
+ if err != nil {
+ return err
}
- var last arvados.Collection
- var filterTime time.Time
+ defer rows.Close()
+ progressTicker := time.NewTicker(10 * time.Second)
+ defer progressTicker.Stop()
callCount := 0
- for {
- progress(callCount, expectCount)
- var page arvados.CollectionList
- err := c.RequestAndDecode(&page, "GET", "arvados/v1/collections", nil, params)
+ for rows.Next() {
+ var coll arvados.Collection
+ var classesDesired, classesConfirmed []byte
+ err = rows.Scan(&coll.UUID, &coll.ManifestText, &coll.ModifiedAt, &coll.PortableDataHash,
+ &coll.ReplicationDesired, &coll.ReplicationConfirmed, &coll.ReplicationConfirmedAt,
+ &classesDesired, &classesConfirmed, &coll.StorageClassesConfirmedAt,
+ &coll.IsTrashed)
if err != nil {
return err
}
- for _, coll := range page.Items {
- if last.ModifiedAt != nil && *last.ModifiedAt == *coll.ModifiedAt && last.UUID >= coll.UUID {
- continue
- }
- callCount++
- err = f(coll)
- if err != nil {
- return err
- }
- last = coll
+
+ err = json.Unmarshal(classesDesired, &coll.StorageClassesDesired)
+ if err != nil && len(classesDesired) > 0 {
+ return err
}
- if last.ModifiedAt == nil || *last.ModifiedAt == filterTime {
- if page.ItemsAvailable > len(page.Items) {
- // TODO: use "mtime=X && UUID>Y"
- // filters to get all collections with
- // this timestamp, then use "mtime>X"
- // to get the next timestamp.
- return fmt.Errorf("BUG: Received an entire page with the same modified_at timestamp (%v), cannot make progress", filterTime)
- }
- break
+ err = json.Unmarshal(classesConfirmed, &coll.StorageClassesConfirmed)
+ if err != nil && len(classesConfirmed) > 0 {
+ return err
+ }
+ if newestModifiedAt.IsZero() || newestModifiedAt.Before(coll.ModifiedAt) {
+ newestModifiedAt = coll.ModifiedAt
+ }
+ callCount++
+ err = f(coll)
+ if err != nil {
+ return err
+ }
+ select {
+ case <-progressTicker.C:
+ progress(callCount, expectCount)
+ default:
}
- filterTime = *last.ModifiedAt
- params.Filters = []arvados.Filter{{
- Attr: "modified_at",
- Operator: ">=",
- Operand: filterTime,
- }, {
- Attr: "uuid",
- Operator: "!=",
- Operand: last.UUID,
- }}
}
progress(callCount, expectCount)
-
- if checkCount, err := countCollections(c, arvados.ResourceListParams{Filters: []arvados.Filter{{
- Attr: "modified_at",
- Operator: "<=",
- Operand: filterTime}}}); err != nil {
+ err = rows.Close()
+ if err != nil {
+ return err
+ }
+ if checkCount, err := countCollections(c, arvados.ResourceListParams{
+ Filters: []arvados.Filter{{
+ Attr: "modified_at",
+ Operator: "<=",
+ Operand: newestModifiedAt}},
+ IncludeTrash: true,
+ IncludeOldVersions: true,
+ }); err != nil {
return err
} else if callCount < checkCount {
- return fmt.Errorf("Retrieved %d collections with modtime <= T=%q, but server now reports there are %d collections with modtime <= T", callCount, filterTime, checkCount)
+ return fmt.Errorf("Retrieved %d collections with modtime <= T=%q, but server now reports there are %d collections with modtime <= T", callCount, newestModifiedAt, checkCount)
}
return nil
}
+
+func (bal *Balancer) updateCollections(ctx context.Context, c *arvados.Client, cluster *arvados.Cluster) error {
+ ctx, cancel := context.WithCancel(ctx)
+ defer cancel()
+
+ defer bal.time("update_collections", "wall clock time to update collections")()
+ threshold := time.Now()
+ thresholdStr := threshold.Format(time.RFC3339Nano)
+
+ updated := int64(0)
+
+ errs := make(chan error, 1)
+ collQ := make(chan arvados.Collection, cluster.Collections.BalanceCollectionBuffers)
+ go func() {
+ defer close(collQ)
+ err := EachCollection(ctx, bal.DB, c, func(coll arvados.Collection) error {
+ if atomic.LoadInt64(&updated) >= int64(cluster.Collections.BalanceUpdateLimit) {
+ bal.logf("reached BalanceUpdateLimit (%d)", cluster.Collections.BalanceUpdateLimit)
+ cancel()
+ return context.Canceled
+ }
+ collQ <- coll
+ return nil
+ }, func(done, total int) {
+ bal.logf("update collections: %d/%d (%d updated @ %.01f updates/s)", done, total, atomic.LoadInt64(&updated), float64(atomic.LoadInt64(&updated))/time.Since(threshold).Seconds())
+ })
+ if err != nil && err != context.Canceled {
+ select {
+ case errs <- err:
+ default:
+ }
+ }
+ }()
+
+ var wg sync.WaitGroup
+
+ // Use about 1 goroutine per 2 CPUs. Based on experiments with
+ // a 2-core host, using more concurrent database
+ // calls/transactions makes this process slower, not faster.
+ for i := 0; i < runtime.NumCPU()+1/2; i++ {
+ wg.Add(1)
+ goSendErr(errs, func() error {
+ defer wg.Done()
+ tx, err := bal.DB.Beginx()
+ if err != nil {
+ return err
+ }
+ txPending := 0
+ flush := func(final bool) error {
+ err := tx.Commit()
+ if err != nil {
+ tx.Rollback()
+ return err
+ }
+ txPending = 0
+ if final {
+ return nil
+ }
+ tx, err = bal.DB.Beginx()
+ return err
+ }
+ txBatch := 100
+ for coll := range collQ {
+ if ctx.Err() != nil || len(errs) > 0 {
+ continue
+ }
+ blkids, err := coll.SizedDigests()
+ if err != nil {
+ bal.logf("%s: %s", coll.UUID, err)
+ continue
+ }
+ repl := bal.BlockStateMap.GetConfirmedReplication(blkids, coll.StorageClassesDesired)
+
+ desired := bal.DefaultReplication
+ if coll.ReplicationDesired != nil {
+ desired = *coll.ReplicationDesired
+ }
+ if repl > desired {
+ // If actual>desired, confirm
+ // the desired number rather
+ // than actual to avoid
+ // flapping updates when
+ // replication increases
+ // temporarily.
+ repl = desired
+ }
+ classes, err := json.Marshal(coll.StorageClassesDesired)
+ if err != nil {
+ bal.logf("BUG? json.Marshal(%v) failed: %s", classes, err)
+ continue
+ }
+ needUpdate := coll.ReplicationConfirmed == nil || *coll.ReplicationConfirmed != repl || len(coll.StorageClassesConfirmed) != len(coll.StorageClassesDesired)
+ for i := range coll.StorageClassesDesired {
+ if !needUpdate && coll.StorageClassesDesired[i] != coll.StorageClassesConfirmed[i] {
+ needUpdate = true
+ }
+ }
+ if !needUpdate {
+ continue
+ }
+ _, err = tx.ExecContext(ctx, `update collections set
+ replication_confirmed=$1,
+ replication_confirmed_at=$2,
+ storage_classes_confirmed=$3,
+ storage_classes_confirmed_at=$2
+ where uuid=$4`,
+ repl, thresholdStr, classes, coll.UUID)
+ if err != nil {
+ if err != context.Canceled {
+ bal.logf("%s: update failed: %s", coll.UUID, err)
+ }
+ continue
+ }
+ atomic.AddInt64(&updated, 1)
+ if txPending++; txPending >= txBatch {
+ err = flush(false)
+ if err != nil {
+ return err
+ }
+ }
+ }
+ return flush(true)
+ })
+ }
+ wg.Wait()
+ bal.logf("updated %d collections", updated)
+ if err := <-errs; err != nil {
+ return fmt.Errorf("error updating collections: %s", err)
+ }
+ return nil
+}
+
+// Call f in a new goroutine. If it returns a non-nil error, send the
+// error to the errs channel (unless the channel is already full with
+// another error).
+func goSendErr(errs chan<- error, f func() error) {
+ go func() {
+ err := f()
+ if err != nil {
+ select {
+ case errs <- err:
+ default:
+ }
+ }
+ }()
+}
projects / arvados.git / blobdiff