test

src/XrdCeph/XrdCephOss.cc

@@ -346,7 +346,7 @@ int XrdCephOss::Configure(const char *configfn, XrdSysError &Eroute) {
            if (!Config.GetRest(parms, sizeof(parms)) || parms[0]) {
              Eroute.Emsg("Config", "readvalgname parameters will be ignored");
            }
-          m_configBufferIOmode = var; // allowed values would be aio, io
+          m_configBufferIOmode = var; // allowed values would be aio, io, write-only-io
          } else {
            Eroute.Emsg("Config", "Missing value for ceph.bufferiomode in config file", configfn);
            return 1;

src/XrdCeph/XrdCephOssBufferedFile.cc

@@ -151,6 +151,10 @@ ssize_t XrdCephOssBufferedFile::Read(off_t offset, size_t blen) {
 ssize_t XrdCephOssBufferedFile::Read(void *buff, off_t offset, size_t blen) {
   size_t thread_id = std::hash<std::thread::id>{}(std::this_thread::get_id());
 
+  if (m_bufferIOmode == "write-only-io") {
+    return m_xrdOssDF->Read(buff, offset, blen);
+  }
+
   IXrdCephBufferAlg * buffer{nullptr};
   // check for, and create if needed, a buffer
   {
@@ -326,11 +330,11 @@ std::unique_ptr<XrdCephBuffer::IXrdCephBufferAlg> XrdCephOssBufferedFile::create
       std::unique_ptr<ICephIOAdapter>     cephio;
       if (m_bufferIOmode == "aio") {
           cephio = std::unique_ptr<ICephIOAdapter>(new CephIOAdapterAIORaw(cephbuffer.get(),m_fd));
-      } else if (m_bufferIOmode == "io") {
+      } else if (m_bufferIOmode == "io" || m_bufferIOmode == "write-only-io") {
           cephio = std::unique_ptr<ICephIOAdapter>(new CephIOAdapterRaw(cephbuffer.get(),m_fd,
                                                   !m_cephoss->m_useDefaultPreadAlg));
       } else {
-            BUFLOG("XrdCephOssBufferedFile: buffer mode needs to be one of aio|io " );
+            BUFLOG("XrdCephOssBufferedFile: buffer mode needs to be one of aio|io|write-only-io " );
             m_xrdOssDF->Close();
             return bufferAlg; // invalid instance;
       }