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Add remote Diskinfo caching (#10824)

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Add 1 second remote disk info cache.

Should decrease need for remote calls a great deal due to how actively it is used now.
This commit is contained in:
Klaus Post 2020-11-04 08:00:18 -08:00 committed by GitHub
parent 5c72a34fa8
commit 1e11b4629f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 25 additions and 13 deletions
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38
cmd/storage-rest-client.go
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@ -28,6 +28,7 @@ import (
"path"
"strconv"
"strings"
"time"
"github.com/minio/minio/cmd/http"
xhttp "github.com/minio/minio/cmd/http"
@ -115,6 +116,8 @@ type storageRESTClient struct {
endpoint Endpoint
restClient *rest.Client
diskID string
diskInfoCache timedValue
}
// Wrapper to restClient.Call to handle network errors, in case of network error the connection is makred disconnected
@ -195,19 +198,28 @@ func (client *storageRESTClient) SetDiskID(id string) {
// DiskInfo - fetch disk information for a remote disk.
func (client *storageRESTClient) DiskInfo(ctx context.Context) (info DiskInfo, err error) {
respBody, err := client.call(ctx, storageRESTMethodDiskInfo, nil, nil, -1)
if err != nil {
return
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&info)
if err != nil {
return info, err
}
if info.Error != "" {
return info, toStorageErr(errors.New(info.Error))
}
return info, nil
client.diskInfoCache.Once.Do(func() {
client.diskInfoCache.TTL = time.Second
client.diskInfoCache.Update = func() (interface{}, error) {
var info DiskInfo
respBody, err := client.call(ctx, storageRESTMethodDiskInfo, nil, nil, -1)
if err != nil {
return info, err
}
defer http.DrainBody(respBody)
err = gob.NewDecoder(respBody).Decode(&info)
if err != nil {
return info, err
}
if info.Error != "" {
return info, toStorageErr(errors.New(info.Error))
}
return info, nil
}
})
v, err := client.diskInfoCache.Get()
info = v.(DiskInfo)
return info, err
}
// MakeVolBulk - create multiple volumes in a bulk operation.