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False Library Locks in Library Manager - DC/Expedition

Question asked by chris.smith on Mar 29, 2010
Latest reply on Mar 30, 2010 by strangd

We have been experiencing issues with file locking within the Library Manager environment and I wanted to get some opinions on work-arounds or perhaps join with others to drive an enhancement request to the deficiencies in the architecture of the manager app itself.


This is in EE2007.4 and seems to be more problematic since the days of WG2005 SP3


Common Scenarios are:

1.     Librarians who enter the library manager ok. Later receive “Read-Only” message during a save, which makes them re-do work.

Technically from what I can see there are users who might be loading a DC job that references the LMC, thus making a “READ” lock to the file in Windows Server 2003.

2.     Librarians who attempt to use Library Services will lock multiple partitions that they don’t intend on using or pushing data into. (Tool Default??) We prefer for this not to lock happen unless they intend on pulling/pushing into a particular partition

3.     Users with WI-FI connections have a tendency to make read-lock conditions because of slow load times. Also more prevalent with VPN users.

4.     Users who do place device for an extended period or place symbols will prevent the ability of adding/changing the LMC and/or SLBs until every user has exited this area.

We have seen the identical problems on a Windows Server and a Unix File Share. We are using administrative tools to force files to be closed in urgent situations and Robocopy to mirror from a “Mirror Librarian” LMC to minimize the conflicts, but sometimes this has lock issues also and we have to set retries and re-run as required.

I understand the basics of DMS but currently we can’t justify the change or cost. We would prefer to see some future changes where perhaps there is a different form of “caching” perhaps for LMC users so Librarians can access the central library’s more effectively.

Feel Free to email me direct or reply to this posting.


Chris Smith
Application Support Analyst
National Instruments