Repository navigation
Expand file tree
/
Copy pathdisk.go
More file actions
140 lines (118 loc) · 3.62 KB
/
Copy pathdisk.go
File metadata and controls
140 lines (118 loc) · 3.62 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
* Minio Cloud Storage, (C) 2018 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package disk
import (
"bytes"
"crypto/rand"
"errors"
"os"
"path"
"strconv"
"time"
humanize "github.com/dustin/go-humanize"
)
// file size for performance read and write checks
const (
randBufSize = 1 * humanize.KiByte
randParts = 1024
fileSize = randParts * randBufSize
// Total count of read / write iteration for performance measurement
iterations = 10
)
// Info stat fs struct is container which holds following values
// Total - total size of the volume / disk
// Free - free size of the volume / disk
// Files - total inodes available
// Ffree - free inodes available
// FSType - file system type
type Info struct {
Total uint64
Free uint64
Files uint64
Ffree uint64
FSType string
// Usage is calculated per tenant.
Usage uint64
}
// Performance holds informantion about read and write speed of a disk
type Performance struct {
Path string `json:"path"`
Error string `json:"error,omitempty"`
WriteSpeed float64 `json:"writeSpeed"`
ReadSpeed float64 `json:"readSpeed"`
}
// GetPerformance returns given disk's read and write performance
func GetPerformance(path string) Performance {
perf := Performance{}
write, read, err := doPerfMeasure(path)
if err != nil {
perf.Error = err.Error()
return perf
}
perf.WriteSpeed = write
perf.ReadSpeed = read
return perf
}
// Calculate the write and read performance - write and read 10 tmp (1 MiB)
// files and find the average time taken (Bytes / Sec)
func doPerfMeasure(fsPath string) (write, read float64, err error) {
var count int
var totalWriteElapsed time.Duration
var totalReadElapsed time.Duration
defer os.RemoveAll(fsPath)
randBuf := make([]byte, randBufSize)
rand.Read(randBuf)
buf := bytes.Repeat(randBuf, randParts)
// create the enclosing directory
err = os.MkdirAll(fsPath, 0777)
if err != nil {
return 0, 0, err
}
for count = 1; count <= iterations; count++ {
fsTempObjPath := path.Join(fsPath, strconv.Itoa(count))
// Write performance calculation
writeStart := time.Now()
n, err := writeFile(fsTempObjPath, buf)
if err != nil {
return 0, 0, err
}
if n != fileSize {
return 0, 0, errors.New("Could not write temporary data to disk")
}
writeElapsed := time.Since(writeStart)
totalWriteElapsed += writeElapsed
// Read performance calculation
readStart := time.Now()
n, err = readFile(fsTempObjPath, buf)
if err != nil {
return 0, 0, err
}
if n != fileSize {
return 0, 0, errors.New("Could not read temporary data from disk")
}
readElapsed := time.Since(readStart)
totalReadElapsed += readElapsed
}
// Average time spent = total time elapsed / number of writes
avgWriteTime := totalWriteElapsed.Seconds() / float64(count)
// Write perf = fileSize (in Bytes) / average time spent writing (in seconds)
write = fileSize / avgWriteTime
// Average time spent = total time elapsed / number of writes
avgReadTime := totalReadElapsed.Seconds() / float64(count)
// read perf = fileSize (in Bytes) / average time spent reading (in seconds)
read = fileSize / avgReadTime
return write, read, nil
}