Domino 9 und frühere Versionen > ND6: Administration & Userprobleme

Notes-Client schließt sich beim Surfen

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Glombi:
Aus der Admin Hilfe

Mapped directory links and Domino data security

To ensure data security, do not create a mapped directory link to a file server or shared Network Attached Storage (NAS) server for a Domino server. These links can cause both database corruption and security problems.
Database corruption
If the network connection fails while the Domino server is writing to a database on the file server or shared NAS server, the database can become corrupted. In addition, the interdependence of the file sharing protocols -- Server Message Block (SMB), Common Internet File System (CIFS), and Network File System (NFS) -- and the remote file system can affect the Domino server's performance. Domino sometimes needs to open large numbers of remote files, and low latency for read/write operations to these files is desirable.
To avoid these problems on Domino servers, consider doing one or more of the following:
Create an isolated network and use cut-through (non-buffering) layer-2 switches to interconnect the Domino server to the NAS system.
Limit access to the NAS system to the Domino server.
Reduce the number of hops and the distance between hops in the connection pathways between the Domino server and the storage system.
Use a block protocol instead of a file protocol.
Use a private storage area network (SAN) instead of a shared NAS system.
Avoid creating any file-access contention between Domino and other applications.


To avoid problems with Notes workstations, consider doing the following:
Locate Notes workstations so that they are not accessing a remote file server or NAS system over a WAN.
To minimize the risk of database corruption because of server failure when a Notes client's Domino data directory is on a file server or NAS server, evaluate the reliability of the entire network pathway as well as the remote system's ability to maintain uninterrupted sessions to the Notes client over the file sharing protocols it is using (SMB, CIFS, NFS, NetWare Core Protocol, or AppleShare).


If a Notes client's Domino data directory is on a file server or NAS server, remember that only one user (user session) can have the user data directory files open a time. Lotus Notes does not support concurrent access to the same "local" database by two clients.
Security problems



When "Encrypt network data" is enabled, all Domino server and Notes workstation traffic is encrypted. However, the file I/O between the Domino server and the file server or shared NAS server is not encrypted, leaving it vulnerable to access by unauthorized users.


Daraus erkenne ich - zumindest für Clients - keine nicht supportete Umgebung.

Andreas

m3:
Andreas, zwischen einem Directory Link und dem Notes-Datenverzeichnis auf einem Netzlaufwerk ist aber ein Unterschied.

@Manfred: Leg bei den Usern, bei denen die Abstürze vorkommen, das Data-Verzeichnis mal lokal und beobachte. Wenn die Probleme damit behoben sind, dann habt ihr kurze Aussetzer im Netz, auf die Notes meiner Erfahrung nach sehr empfindlich reagiert.

Glombi:
@m3: Schon klar, aber das Dokument gliedert sich in 2 Abschnitte - einmal für Server und dann für Clients. Und bei denen wird speziell vom Dateverzeichnis gesprochen und Tipps gegeben, was man zu beachten hat.
Ich hatte versucht, dass durch die fette Schritft zu kennzeichnen.

Andreas

mcilly:
Aus der KB und wenn ich das richtige interpretiere, dann putzt sich IBM schon ab, sobald das Data im Netz liegt.

Problem
Is running the IBM Lotus Notes Client with the Notes.ini and/or the Notes data directory on a file server a supported or recommended configuration? 
 
Solution
Important Note:
While some users have successfully implemented this configuration, others have encountered significant problems due primarily to network interruptions, performance issues and other problems that only occur with the \Data directory on a network location instead of locally. Use of this configuration is done at the customer's own risk and can result in lost, non-recoverable data. Notes Support will provide assistance with Notes Client problems encountered in this configuration to the extent that the problem is determined not to be loss of connection to the network or required file servers, as well as performance degradation with remote data files vs Local, and other issues that only occur with files on a network drive/file server.

Errors such as "Error: Reached End of File" can occur when closing the Notes client. Also, an "Invalid File Handles" error message can occur when closing a document. This error message occurs when the Notes.ini and/or the entire Notes data directory are stored on a network drive and the network connection is (temporarily) disconnected.

While Notes is involved in the scenario that produces the error, the error is generated by the operating system; not Notes. It can also occur randomly, while you are working in Notes. An enhancement request was submitted to Quality Engineering, requesting that the customer be able to close the Notes client in a normal way (without having to use the task manager) when these errors occur. This was addressed in Notes 4.5.5 and Notes 4.6.2.

Also, when Notes.ini files and data directories are on a file server and the file server runs out of space, one customer found that the Notes.ini files were being corrupted when attempting to update the NewMailSeqNum. Without sufficient space to write out the full .ini file during the update, the file was getting a "partial update" of the NewMailSeqNum pre-pended to the .ini file with a single right square bracket on the line following the number. This left the .ini file uninterpretable. This is further reason not to have the Notes.ini files (and data directories) out on a file server.

Another issue that has been reported when the Notes.ini and/or the Notes data directory is located on a network file server is a dialog box with the error, "Lotus Notes." This error appears intermittently when opening a server-based database. Moving the specified file and directory to a local drive, which is the standard setup, has resolved the issues stated above. Quality Engineering is aware of this issue, but has not been able to reproduce it.

This problem can also manifest itself if the owner of the file in Novell is different than the Notes user. In one case, a customer had created a "consultant" user in Novell and limited the "consultant's" allotted disk space. It was the "consultant's" job to set up the directory structure and files for each Notes user on the network. When the "consultant" was close to the limit of his allotted disk space the Notes user was unable to launch their Notes client. They received the error, "Out of disk space writing Notes.ini" when launching Notes and were unable to start. When the NetWare administrator checked the Notes user's allotted disk space there was always more than enough. The problem was corrected when the Notes user was made the owner of all his own personal data files in Novell.

m3:

--- Zitat von: Glombi am 27.11.06 - 10:58:48 ---@m3: Schon klar, aber das Dokument gliedert sich in 2 Abschnitte - einmal für Server und dann für Clients. Und bei denen wird speziell vom Dateverzeichnis gesprochen und Tipps gegeben, was man zu beachten hat.
Ich hatte versucht, dass durch die fette Schritft zu kennzeichnen.
--- Ende Zitat ---
Entschuldige, es ist Montag und ich hatte erst einen Kaffee. Die Hervorhebung hatte ich übersehen.  ::)

Ich stimme Dir zu, wobei vermutlich der KB-Eintrag mehr Gewicht hat. :(

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