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650dccfa9e
Currently, cache purges are triggered as soon as the low watermark is exceeded.
To reduce IO this should only be done when reaching the high watermark.
This simplifies checks and reduces all calls for a GC to go through
`dcache.diskSpaceAvailable(size)`. While a comment claims that
`dcache.triggerGC <- struct{}{}` was non-blocking I don't see how
that was possible. Instead, we add a 1 size to the queue channel
and use channel semantics to avoid blocking when a GC has
already been requested.
`bytesToClear` now takes the high watermark into account to it will
not request any bytes to be cleared until that is reached.
177 lines
6.7 KiB
Go
177 lines
6.7 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2019 MinIO, Inc.
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*
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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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*/
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package cmd
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import (
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"net/http"
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"reflect"
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"testing"
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"time"
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)
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func TestGetCacheControlOpts(t *testing.T) {
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expiry, _ := time.Parse(http.TimeFormat, "Wed, 21 Oct 2015 07:28:00 GMT")
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testCases := []struct {
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cacheControlHeaderVal string
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expiryHeaderVal time.Time
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expectedCacheControl *cacheControl
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expectedErr bool
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}{
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{"", timeSentinel, nil, false},
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{"max-age=2592000, public", timeSentinel, &cacheControl{maxAge: 2592000, sMaxAge: 0, minFresh: 0, expiry: time.Time{}}, false},
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{"max-age=2592000, no-store", timeSentinel, &cacheControl{maxAge: 2592000, sMaxAge: 0, noStore: true, minFresh: 0, expiry: time.Time{}}, false},
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{"must-revalidate, max-age=600", timeSentinel, &cacheControl{maxAge: 600, sMaxAge: 0, minFresh: 0, expiry: time.Time{}}, false},
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{"s-maxAge=2500, max-age=600", timeSentinel, &cacheControl{maxAge: 600, sMaxAge: 2500, minFresh: 0, expiry: time.Time{}}, false},
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{"s-maxAge=2500, max-age=600", expiry, &cacheControl{maxAge: 600, sMaxAge: 2500, minFresh: 0, expiry: time.Date(2015, time.October, 21, 07, 28, 00, 00, time.UTC)}, false},
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{"s-maxAge=2500, max-age=600s", timeSentinel, &cacheControl{maxAge: 600, sMaxAge: 2500, minFresh: 0, expiry: time.Time{}}, true},
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}
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for _, testCase := range testCases {
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t.Run("", func(t *testing.T) {
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m := make(map[string]string)
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m["cache-control"] = testCase.cacheControlHeaderVal
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if !testCase.expiryHeaderVal.Equal(timeSentinel) {
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m["expires"] = testCase.expiryHeaderVal.String()
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}
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c := cacheControlOpts(ObjectInfo{UserDefined: m, Expires: testCase.expiryHeaderVal})
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if testCase.expectedErr && (c != nil) {
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t.Errorf("expected err, got <nil>")
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}
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if !testCase.expectedErr && !reflect.DeepEqual(c, testCase.expectedCacheControl) {
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t.Errorf("expected %v, got %v", testCase.expectedCacheControl, c)
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}
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})
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}
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}
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func TestIsMetadataSame(t *testing.T) {
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testCases := []struct {
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m1 map[string]string
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m2 map[string]string
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expected bool
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}{
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{nil, nil, true},
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{nil, map[string]string{}, false},
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{map[string]string{"k": "v"}, map[string]string{"k": "v"}, true},
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{map[string]string{"k": "v"}, map[string]string{"a": "b"}, false},
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{map[string]string{"k1": "v1", "k2": "v2"}, map[string]string{"k1": "v1", "k2": "v1"}, false},
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{map[string]string{"k1": "v1", "k2": "v2"}, map[string]string{"k1": "v1", "k2": "v2"}, true},
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{map[string]string{"K1": "v1", "k2": "v2"}, map[string]string{"k1": "v1", "k2": "v2"}, false},
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{map[string]string{"k1": "v1", "k2": "v2", "k3": "v3"}, map[string]string{"k1": "v1", "k2": "v2"}, false},
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}
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for i, testCase := range testCases {
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actual := isMetadataSame(testCase.m1, testCase.m2)
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if testCase.expected != actual {
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t.Errorf("test %d expected %v, got %v", i, testCase.expected, actual)
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}
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}
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}
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func TestNewFileScorer(t *testing.T) {
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fs, err := newFileScorer(1000, time.Now().Unix(), 10)
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if err != nil {
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t.Fatal(err)
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}
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if len(fs.fileNames()) != 0 {
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t.Fatal("non zero files??")
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}
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now := time.Now()
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fs.addFile("recent", now.Add(-time.Minute), 1000, 10)
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fs.addFile("older", now.Add(-time.Hour), 1000, 10)
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if !reflect.DeepEqual(fs.fileNames(), []string{"older"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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fs.reset()
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fs.addFile("bigger", now.Add(-time.Minute), 2000, 10)
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fs.addFile("recent", now.Add(-time.Minute), 1000, 10)
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if !reflect.DeepEqual(fs.fileNames(), []string{"bigger"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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fs.reset()
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fs.addFile("less", now.Add(-time.Minute), 1000, 5)
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fs.addFile("recent", now.Add(-time.Minute), 1000, 10)
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if !reflect.DeepEqual(fs.fileNames(), []string{"less"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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fs.reset()
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fs.addFile("small", now.Add(-time.Minute), 200, 10)
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fs.addFile("medium", now.Add(-time.Minute), 300, 10)
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if !reflect.DeepEqual(fs.fileNames(), []string{"medium", "small"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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fs.addFile("large", now.Add(-time.Minute), 700, 10)
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fs.addFile("xsmol", now.Add(-time.Minute), 7, 10)
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if !reflect.DeepEqual(fs.fileNames(), []string{"large", "medium"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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fs.reset()
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fs.addFile("less", now.Add(-time.Minute), 500, 5)
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fs.addFile("recent", now.Add(-time.Minute), 500, 10)
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if !fs.adjustSaveBytes(-500) {
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t.Fatal("we should still need more bytes, got false")
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}
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// We should only need 500 bytes now.
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if !reflect.DeepEqual(fs.fileNames(), []string{"less"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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if fs.adjustSaveBytes(-500) {
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t.Fatal("we shouldn't need any more bytes, got true")
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}
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fs, err = newFileScorer(1000, time.Now().Unix(), 10)
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if err != nil {
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t.Fatal(err)
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}
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fs.addFile("bigger", now.Add(-time.Minute), 50, 10)
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// sorting should be consistent after adjusting savebytes.
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fs.adjustSaveBytes(-800)
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fs.addFile("smaller", now.Add(-time.Minute), 40, 10)
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if !reflect.DeepEqual(fs.fileNames(), []string{"bigger", "smaller"}) {
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t.Fatal("unexpected file list", fs.queueString())
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}
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}
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func TestBytesToClear(t *testing.T) {
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testCases := []struct {
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total int64
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free int64
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quotaPct uint64
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watermarkLow uint64
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watermarkHigh uint64
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expected uint64
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}{
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{total: 1000, free: 800, quotaPct: 40, watermarkLow: 90, watermarkHigh: 90, expected: 0},
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{total: 1000, free: 200, quotaPct: 40, watermarkLow: 90, watermarkHigh: 90, expected: 400},
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{total: 1000, free: 400, quotaPct: 40, watermarkLow: 90, watermarkHigh: 90, expected: 240},
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{total: 1000, free: 600, quotaPct: 40, watermarkLow: 90, watermarkHigh: 90, expected: 40},
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{total: 1000, free: 600, quotaPct: 40, watermarkLow: 70, watermarkHigh: 70, expected: 120},
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{total: 1000, free: 1000, quotaPct: 90, watermarkLow: 70, watermarkHigh: 70, expected: 0},
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// High not yet reached..
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{total: 1000, free: 250, quotaPct: 100, watermarkLow: 50, watermarkHigh: 90, expected: 0},
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{total: 1000, free: 250, quotaPct: 100, watermarkLow: 50, watermarkHigh: 90, expected: 0},
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}
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for i, tc := range testCases {
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toClear := bytesToClear(tc.total, tc.free, tc.quotaPct, tc.watermarkLow, tc.watermarkHigh)
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if tc.expected != toClear {
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t.Errorf("test %d expected %v, got %v", i, tc.expected, toClear)
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}
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}
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}
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