295 lines
8.9 KiB
Go
295 lines
8.9 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
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// See LICENSE for copying information.
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package satellitedb
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import (
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"context"
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"database/sql"
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"errors"
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"time"
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"github.com/zeebo/errs"
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"storj.io/common/uuid"
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"storj.io/private/dbutil"
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"storj.io/private/dbutil/pgutil"
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"storj.io/storj/satellite/metabase"
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"storj.io/storj/satellite/repair/queue"
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"storj.io/storj/satellite/satellitedb/dbx"
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)
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// RepairQueueSelectLimit defines how many items can be selected at the same time.
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const RepairQueueSelectLimit = 1000
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// repairQueue implements storj.io/storj/satellite/repair/queue.RepairQueue.
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type repairQueue struct {
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db *satelliteDB
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}
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func (r *repairQueue) Insert(ctx context.Context, seg *queue.InjuredSegment) (alreadyInserted bool, err error) {
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defer mon.Task()(&ctx)(&err)
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// insert if not exists, or update healthy count if does exist
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var query string
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// we want to insert the segment if it is not in the queue, but update the segment health if it already is in the queue
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// we also want to know if the result was an insert or an update - this is the reasoning for the xmax section of the postgres query
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// and the separate cockroach query (which the xmax trick does not work for)
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switch r.db.impl {
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case dbutil.Postgres:
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query = `
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INSERT INTO repair_queue
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(
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stream_id, position, segment_health
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)
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VALUES (
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$1, $2, $3
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)
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ON CONFLICT (stream_id, position)
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DO UPDATE
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SET segment_health=$3, updated_at=current_timestamp
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RETURNING (xmax != 0) AS alreadyInserted
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`
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case dbutil.Cockroach:
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// TODO it's not optimal solution but crdb is not used in prod for repair queue
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query = `
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WITH inserted AS (
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SELECT count(*) as alreadyInserted FROM repair_queue
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WHERE stream_id = $1 AND position = $2
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)
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INSERT INTO repair_queue
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(
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stream_id, position, segment_health
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)
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VALUES (
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$1, $2, $3
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)
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ON CONFLICT (stream_id, position)
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DO UPDATE
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SET segment_health=$3, updated_at=current_timestamp
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RETURNING (SELECT alreadyInserted FROM inserted)
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`
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}
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rows, err := r.db.QueryContext(ctx, query, seg.StreamID, seg.Position.Encode(), seg.SegmentHealth)
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if err != nil {
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return false, err
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}
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defer func() { err = errs.Combine(err, rows.Close()) }()
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if !rows.Next() {
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// cockroach query does not return anything if the segment is already in the queue
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alreadyInserted = true
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} else {
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err = rows.Scan(&alreadyInserted)
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if err != nil {
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return false, err
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}
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}
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return alreadyInserted, rows.Err()
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}
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func (r *repairQueue) InsertBatch(
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ctx context.Context,
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segments []*queue.InjuredSegment,
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) (newlyInsertedSegments []*queue.InjuredSegment, err error) {
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defer mon.Task()(&ctx)(&err)
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if len(segments) == 0 {
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return nil, nil
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}
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// insert if not exists, or update healthy count if does exist
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var query string
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// we want to insert the segment if it is not in the queue, but update the segment health if it already is in the queue
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// we also want to know if the result was an insert or an update - this is the reasoning for the xmax section of the postgres query
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// and the separate cockroach query (which the xmax trick does not work for)
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switch r.db.impl {
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case dbutil.Postgres:
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query = `
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INSERT INTO repair_queue
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(
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stream_id, position, segment_health
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)
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VALUES (
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UNNEST($1::BYTEA[]),
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UNNEST($2::INT8[]),
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UNNEST($3::double precision[])
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)
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ON CONFLICT (stream_id, position)
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DO UPDATE
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SET segment_health=EXCLUDED.segment_health, updated_at=current_timestamp
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RETURNING NOT(xmax != 0) AS newlyInserted
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`
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case dbutil.Cockroach:
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// TODO it's not optimal solution but crdb is not used in prod for repair queue
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query = `
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WITH to_insert AS (
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SELECT
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UNNEST($1::BYTEA[]) AS stream_id,
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UNNEST($2::INT8[]) AS position,
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UNNEST($3::double precision[]) AS segment_health
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),
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do_insert AS (
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INSERT INTO repair_queue (
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stream_id, position, segment_health
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)
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SELECT stream_id, position, segment_health
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FROM to_insert
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ON CONFLICT (stream_id, position)
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DO UPDATE
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SET
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segment_health=EXCLUDED.segment_health,
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updated_at=current_timestamp
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RETURNING false
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)
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SELECT
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(repair_queue.stream_id IS NULL) AS newlyInserted
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FROM to_insert
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LEFT JOIN repair_queue
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ON to_insert.stream_id = repair_queue.stream_id
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AND to_insert.position = repair_queue.position
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`
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}
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var insertData struct {
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StreamIDs []uuid.UUID
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Positions []int64
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SegmentHealths []float64
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}
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for _, segment := range segments {
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insertData.StreamIDs = append(insertData.StreamIDs, segment.StreamID)
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insertData.Positions = append(insertData.Positions, int64(segment.Position.Encode()))
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insertData.SegmentHealths = append(insertData.SegmentHealths, segment.SegmentHealth)
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}
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rows, err := r.db.QueryContext(
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ctx, query,
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pgutil.UUIDArray(insertData.StreamIDs),
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pgutil.Int8Array(insertData.Positions),
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pgutil.Float8Array(insertData.SegmentHealths),
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)
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if err != nil {
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return newlyInsertedSegments, err
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}
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defer func() { err = errs.Combine(err, rows.Close()) }()
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i := 0
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for rows.Next() {
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var isNewlyInserted bool
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err = rows.Scan(&isNewlyInserted)
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if err != nil {
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return newlyInsertedSegments, err
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}
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if isNewlyInserted {
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newlyInsertedSegments = append(newlyInsertedSegments, segments[i])
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}
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i++
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}
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return newlyInsertedSegments, rows.Err()
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}
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func (r *repairQueue) Select(ctx context.Context) (seg *queue.InjuredSegment, err error) {
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defer mon.Task()(&ctx)(&err)
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segment := queue.InjuredSegment{}
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switch r.db.impl {
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case dbutil.Cockroach:
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err = r.db.QueryRowContext(ctx, `
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UPDATE repair_queue SET attempted_at = now()
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WHERE attempted_at IS NULL OR attempted_at < now() - interval '6 hours'
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ORDER BY segment_health ASC, attempted_at NULLS FIRST
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LIMIT 1
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RETURNING stream_id, position, attempted_at, updated_at, inserted_at, segment_health
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`).Scan(&segment.StreamID, &segment.Position, &segment.AttemptedAt,
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&segment.UpdatedAt, &segment.InsertedAt, &segment.SegmentHealth)
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case dbutil.Postgres:
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err = r.db.QueryRowContext(ctx, `
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UPDATE repair_queue SET attempted_at = now() WHERE (stream_id, position) = (
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SELECT stream_id, position FROM repair_queue
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WHERE attempted_at IS NULL OR attempted_at < now() - interval '6 hours'
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ORDER BY segment_health ASC, attempted_at NULLS FIRST FOR UPDATE SKIP LOCKED LIMIT 1
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) RETURNING stream_id, position, attempted_at, updated_at, inserted_at, segment_health
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`).Scan(&segment.StreamID, &segment.Position, &segment.AttemptedAt,
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&segment.UpdatedAt, &segment.InsertedAt, &segment.SegmentHealth)
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default:
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return seg, errs.New("unhandled database: %v", r.db.impl)
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}
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return nil, queue.ErrEmpty.New("")
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}
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return nil, err
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}
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return &segment, err
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}
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func (r *repairQueue) Delete(ctx context.Context, seg *queue.InjuredSegment) (err error) {
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defer mon.Task()(&ctx)(&err)
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_, err = r.db.ExecContext(ctx, r.db.Rebind(`DELETE FROM repair_queue WHERE stream_id = ? AND position = ?`), seg.StreamID, seg.Position.Encode())
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return Error.Wrap(err)
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}
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func (r *repairQueue) Clean(ctx context.Context, before time.Time) (deleted int64, err error) {
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defer mon.Task()(&ctx)(&err)
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n, err := r.db.Delete_RepairQueue_By_UpdatedAt_Less(ctx, dbx.RepairQueue_UpdatedAt(before))
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return n, Error.Wrap(err)
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}
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func (r *repairQueue) SelectN(ctx context.Context, limit int) (segs []queue.InjuredSegment, err error) {
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defer mon.Task()(&ctx)(&err)
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if limit <= 0 || limit > RepairQueueSelectLimit {
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limit = RepairQueueSelectLimit
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}
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// TODO: strictly enforce order-by or change tests
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rows, err := r.db.QueryContext(ctx,
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r.db.Rebind(`SELECT stream_id, position, attempted_at, updated_at, segment_health
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FROM repair_queue LIMIT ?`), limit,
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)
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if err != nil {
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return nil, Error.Wrap(err)
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}
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defer func() { err = errs.Combine(err, rows.Close()) }()
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for rows.Next() {
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var seg queue.InjuredSegment
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err = rows.Scan(&seg.StreamID, &seg.Position, &seg.AttemptedAt,
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&seg.UpdatedAt, &seg.SegmentHealth)
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if err != nil {
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return segs, Error.Wrap(err)
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}
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segs = append(segs, seg)
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}
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return segs, Error.Wrap(rows.Err())
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}
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func (r *repairQueue) Count(ctx context.Context) (count int, err error) {
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defer mon.Task()(&ctx)(&err)
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// Count every segment regardless of how recently repair was last attempted
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err = r.db.QueryRowContext(ctx, r.db.Rebind(`SELECT COUNT(*) as count FROM repair_queue`)).Scan(&count)
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return count, Error.Wrap(err)
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}
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// TestingSetAttemptedTime sets attempted time for a segment.
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func (r *repairQueue) TestingSetAttemptedTime(ctx context.Context, streamID uuid.UUID,
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position metabase.SegmentPosition, t time.Time) (rowsAffected int64, err error) {
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defer mon.Task()(&ctx)(&err)
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res, err := r.db.ExecContext(ctx,
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r.db.Rebind(`UPDATE repair_queue SET attempted_at = ? WHERE stream_id = ? AND position = ?`),
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t, streamID, position.Encode(),
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)
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if err != nil {
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return 0, Error.Wrap(err)
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}
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count, err := res.RowsAffected()
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return count, Error.Wrap(err)
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}
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