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From: Sascha Homeier <shomeier@meyle-mueller.de>
To: "<dev@chemistry.apache.org>" <dev@chemistry.apache.org>
Subject: Re: DotCMIS query
Thread-Topic: DotCMIS query
Thread-Index: Ac/UZbOJLmQTE5JGRsqnVPfADyX1egAkbSqR
Date: Sat, 20 Sep 2014 17:22:08 +0000
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Hi Rajendra,

This sounds like the effect Florian told me about when using non chunked Tr=
ansfer encoding (due to the required length the document is prepared in Mem=
ory at whole).

Maybe a Transfer in chunks will help you. I do not know about DotCmis but M=
aybe there is an Option to create a partial content Stream or sth. In that =
way.

Cheers
Sascha

> Am 20.09.2014 um 10:58 schrieb "Sethi, Rajendra" <Rajendra.Sethi@bchydro.=
com>:
>=20
> Hi there,
>=20
> I am working on SharePoint 2010 (CMIS client) to FileNet P8 5.1 (CMIS Ser=
ver 1.0) content transfer using CMIS and here we are implementing DotCMIS l=
ibrary in SharePoint to initiate file transfer requests targeted for FileNe=
t. We have large files transfer scenarios and while doing some performance =
tests, memory consumption on SharePoint (the client) is too high. I would l=
ike your help to suggest how could I improve these transfers.
>=20
> The implementation is using AtomPub binding and streaming the file conten=
t from a document available in SharePoint library. During the SetContentStr=
eam 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, thi=
s physical memory becomes available once again.
>=20
> We are trying to achieve a high performance solution and may consider mul=
tiple threads to transfer a few files simultaneously. If each process is bl=
ocking 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.
>=20
> This is the code from CMIS client (SharePoint ) ---
>=20
> Dictionary<string, string> parameters =3D new Dictionary<string, string>(=
);
>=20
> // RESTful
> parameters[DotCMIS.SessionParameter.BindingType] =3D BindingType.AtomPub;
> parameters[DotCMIS.SessionParameter.AtomPubUrl] =3D "<AtomPubUrl>";
>=20
> parameters[DotCMIS.SessionParameter.RepositoryId] =3D "<RepositoryID>";
> parameters[DotCMIS.SessionParameter.User] =3D "<username>";
> parameters[DotCMIS.SessionParameter.Password] =3D "<password>";
>=20
> parameters[DotCMIS.SessionParameter.Compression] =3D "true"; // turn on H=
TTP response compression
> parameters[DotCMIS.SessionParameter.ConnectTimeout] =3D "600000"; // 10 m=
inutes // HTTP connect timeout in milliseconds; -1 for infinite
> parameters[DotCMIS.SessionParameter.ReadTimeout] =3D "600000"; // 10 minu=
tes // -1 for infinite
>=20
> SessionFactory factory =3D SessionFactory.NewInstance();
> session =3D factory.CreateSession(parameters);
>=20
>=20
> IFolder cmisFolder =3D (IFolder)session.GetObjectByPath("/cmis test");
>=20
> SPFile file =3D SPContext.Current.Web.GetFile("http://<server>/sites/TS/S=
hared%20Documents/bigfile.txt");
> Dictionary<string, object> properties =3D new Dictionary<string, object>(=
)
>  {
>    {"cmis:name", file.Title },
>    {"cmis:objectTypeId", "cmis:document"},
>  };
>=20
> Stream stream =3D file.OpenBinaryStream(SPOpenBinaryOptions.SkipVirusScan=
);
>=20
> IDocument doc =3D cmisFolder.CreateDocument(properties, null, VersioningS=
tate.CheckedOut);
>=20
> IObjectFactory objectFactory =3D session.ObjectFactory;
> ContentStream contentStream =3D (ContentStream)objectFactory.CreateConten=
tStream(file.Title, file.Length, "text/plain", stream);
>=20
> doc.SetContentStream(contentStream, true, false);
> doc.CheckIn(true, null, null, "optional check in comment");
>=20
>=20
> Thanks
> Rajendra Sethi
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