Hi there,
I am working on SharePoint 2010 (CMIS client) to FileNet P8 5.1 (CMIS Server
1.0) content transfer using CMIS and here we are implementing DotCMIS library
in SharePoint to initiate file transfer requests targeted for FileNet. We have
large files transfer scenarios and while doing some performance tests, memory
consumption on SharePoint (the client) is too high. I would like your help to
suggest how could I improve these transfers.
The implementation is using AtomPub binding and streaming the file content from
a document available in SharePoint library. During the SetContentStream
operation, Modified Physical Memory equivalent to the size of the file being
transferred becomes Not Available (for example, for 2 gb file, about 2 gb
memory becomes Not Available) and hence the Free Memory on the server is
reduced by that file size. Once the transfer operation is completed, this
physical memory becomes available once again.
We are trying to achieve a high performance solution and may consider multiple
threads to transfer a few files simultaneously. If each process is blocking a
large chunk of memory, we will be limited to 1 or max 2 threads at a time. Is
there any code tuning or correction required in the connection/session object
to achieve better results? Please consider the code provided below.
This is the code from CMIS client (SharePoint ) ---
Dictionary<string, string> parameters = new Dictionary<string, string>();
// RESTful
parameters[DotCMIS.SessionParameter.BindingType] = BindingType.AtomPub;
parameters[DotCMIS.SessionParameter.AtomPubUrl] = "<AtomPubUrl>";
parameters[DotCMIS.SessionParameter.RepositoryId] = "<RepositoryID>";
parameters[DotCMIS.SessionParameter.User] = "<username>";
parameters[DotCMIS.SessionParameter.Password] = "<password>";
parameters[DotCMIS.SessionParameter.Compression] = "true"; // turn on HTTP
response compression
parameters[DotCMIS.SessionParameter.ConnectTimeout] = "600000"; // 10 minutes
// HTTP connect timeout in milliseconds; -1 for infinite
parameters[DotCMIS.SessionParameter.ReadTimeout] = "600000"; // 10 minutes //
-1 for infinite
SessionFactory factory = SessionFactory.NewInstance();
session = factory.CreateSession(parameters);
IFolder cmisFolder = (IFolder)session.GetObjectByPath("/cmis test");
SPFile file =
SPContext.Current.Web.GetFile("http://<server>/sites/TS/Shared%20Documents/bigfile.txt");
Dictionary<string, object> properties = new Dictionary<string, object>()
{
{"cmis:name", file.Title },
{"cmis:objectTypeId", "cmis:document"},
};
Stream stream = file.OpenBinaryStream(SPOpenBinaryOptions.SkipVirusScan);
IDocument doc = cmisFolder.CreateDocument(properties, null,
VersioningState.CheckedOut);
IObjectFactory objectFactory = session.ObjectFactory;
ContentStream contentStream =
(ContentStream)objectFactory.CreateContentStream(file.Title, file.Length,
"text/plain", stream);
doc.SetContentStream(contentStream, true, false);
doc.CheckIn(true, null, null, "optional check in comment");
Thanks
Rajendra Sethi
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