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bf4a279a91
Currently all read queries are simply pushed to remote read clients. This is fine, except for remote storage for wich it unefficient and make query slower even if remote read is unnecessary. So we need instead to compare the oldest timestamp in primary/local storage with the query range lower boundary. If the oldest timestamp is older than the mint parameter, then there is no need for remote read. This is an optionnal behavior per remote read client. Signed-off-by: Thibault Chataigner <t.chataigner@criteo.com>
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// Copyright 2017 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package testutil
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import (
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"io/ioutil"
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"os"
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"time"
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"github.com/prometheus/common/model"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/storage/tsdb"
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)
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// NewStorage returns a new storage for testing purposes
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// that removes all associated files on closing.
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func NewStorage(t T) storage.Storage {
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dir, err := ioutil.TempDir("", "test_storage")
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if err != nil {
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t.Fatalf("Opening test dir failed: %s", err)
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}
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// Tests just load data for a series sequentially. Thus we
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// need a long appendable window.
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db, err := tsdb.Open(dir, nil, nil, &tsdb.Options{
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MinBlockDuration: model.Duration(24 * time.Hour),
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MaxBlockDuration: model.Duration(24 * time.Hour),
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})
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if err != nil {
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t.Fatalf("Opening test storage failed: %s", err)
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}
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return testStorage{Storage: tsdb.Adapter(db, int64(0)), dir: dir}
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}
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type testStorage struct {
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storage.Storage
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dir string
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}
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func (s testStorage) Close() error {
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if err := s.Storage.Close(); err != nil {
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return err
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}
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return os.RemoveAll(s.dir)
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}
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