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98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2018-2019 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 disk
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import (
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"os"
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"github.com/ncw/directio"
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)
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// Info stat fs struct is container which holds following values
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// Total - total size of the volume / disk
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// Free - free size of the volume / disk
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// Files - total inodes available
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// Ffree - free inodes available
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// FSType - file system type
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type Info struct {
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Total uint64
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Free uint64
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Files uint64
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Ffree uint64
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FSType string
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// Usage is calculated per tenant.
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Usage uint64
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}
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// Performance holds informantion about read and write speed of a disk
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type Performance struct {
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Path string `json:"path"`
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Error string `json:"error,omitempty"`
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WriteSpeed float64 `json:"writeSpeed"`
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ReadSpeed float64 `json:"readSpeed"`
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}
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// GetPerformance returns given disk's read and write performance
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func GetPerformance(path string, size int64) Performance {
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perf := Performance{}
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write, read, err := doPerfMeasure(path, size)
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if err != nil {
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perf.Error = err.Error()
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return perf
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}
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perf.WriteSpeed = write
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perf.ReadSpeed = read
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return perf
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}
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// Calculate the write and read performance - write and read 10 tmp (1 MiB)
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// files and find the average time taken (Bytes / Sec)
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func doPerfMeasure(fsPath string, size int64) (writeSpeed, readSpeed float64, err error) {
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// Remove the file created for speed test purposes
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defer os.RemoveAll(fsPath)
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// Create a file with O_DIRECT flag
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w, err := OpenFileDirectIO(fsPath, os.O_CREATE|os.O_WRONLY|os.O_EXCL, 0666)
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if err != nil {
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return 0, 0, err
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}
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// Fetch aligned buf for direct-io
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buf := directio.AlignedBlock(speedTestBlockSize)
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writeSpeed, err = speedTestWrite(w, buf, size)
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w.Close()
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if err != nil {
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return 0, 0, err
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}
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// Open file to compute read speed
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r, err := OpenFileDirectIO(fsPath, os.O_RDONLY, 0666)
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if err != nil {
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return 0, 0, err
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}
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defer r.Close()
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readSpeed, err = speedTestRead(r, buf, size)
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if err != nil {
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return 0, 0, err
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}
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return writeSpeed, readSpeed, nil
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}
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