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Add sync mode for 'xl.json' (#6798)

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xl.json is the source of truth for all erasure
coded objects, without which we won't be able to
read the objects properly. This PR enables sync
mode for writing `xl.json` such all writes go hit
the disk and are persistent under situations such
as abrupt power failures on servers running Minio.
This commit is contained in:
Harshavardhana
2018-11-14 06:18:35 -08:00
committed by Nitish Tiwari
parent cf26c937e4
commit f1f23f6f11
7 changed files with 87 additions and 8 deletions
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cmd/storage-rest-server.go
+29
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@@ -179,6 +179,33 @@ func (s *storageRESTServer) AppendFileHandler(w http.ResponseWriter, r *http.Req
}
}
// WriteAllHandler - write to file all content.
func (s *storageRESTServer) WriteAllHandler(w http.ResponseWriter, r *http.Request) {
if !s.IsValid(w, r) {
return
}
vars := mux.Vars(r)
volume := vars[storageRESTVolume]
filePath := vars[storageRESTFilePath]
if r.ContentLength < 0 {
s.writeErrorResponse(w, errInvalidArgument)
return
}
buf := make([]byte, r.ContentLength)
_, err := io.ReadFull(r.Body, buf)
if err != nil {
s.writeErrorResponse(w, err)
return
}
err = s.storage.WriteAll(volume, filePath, buf)
if err != nil {
s.writeErrorResponse(w, err)
}
}
// StatFileHandler - stat a file.
func (s *storageRESTServer) StatFileHandler(w http.ResponseWriter, r *http.Request) {
if !s.IsValid(w, r) {
@@ -336,6 +363,8 @@ func registerStorageRESTHandlers(router *mux.Router, endpoints EndpointList) {
Queries(restQueries(storageRESTVolume, storageRESTFilePath, storageRESTLength)...)
subrouter.Methods(http.MethodPost).Path("/" + storageRESTMethodAppendFile).HandlerFunc(httpTraceHdrs(server.AppendFileHandler)).
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
subrouter.Methods(http.MethodPost).Path("/" + storageRESTMethodWriteAll).HandlerFunc(httpTraceHdrs(server.WriteAllHandler)).
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
subrouter.Methods(http.MethodPost).Path("/" + storageRESTMethodStatFile).HandlerFunc(httpTraceHdrs(server.StatFileHandler)).
Queries(restQueries(storageRESTVolume, storageRESTFilePath)...)
subrouter.Methods(http.MethodPost).Path("/" + storageRESTMethodReadAll).HandlerFunc(httpTraceHdrs(server.ReadAllHandler)).