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Sometimes it is useful to find information about the connection that is holding the lock on a particular file.
Visual Tools
From ACE Monitor it is easy to obtain the connection number(s) associated with a file. From the "Files/Locks" tab find your table of interest and obtain the connection number from the first column.
Then from the "Active Connections" tab, locate the user and obtain additional information such as IP address, etc. about them.
Command Line Tools
The ctadmn Administrator's utility can provide this information.
From ctadmn, select option 3 and enter the name of the file in question (litliv.dat in the example below):
1. List all files open by the c-tree Server
2. List all files open by a particular connection
3. List connections that have a particular file open
4. List locks held on a particular file
5. Close a file that is open in KEEPOPEN mode
Enter your choice (1-5), or 'q' to return to previous menu>> 3
Enter complete file name >> litliv.dat
================================================================
List of Users with File litliv.dat Open
================================================================
User
Connection File
Number Number User Name
23 0 ADMIN
================================================================
Press RETURN to continue...
Once you have retrieved the "Connection Number" you can use it to find info about the connection:
Monitor Clients:
1. List Attached Clients
2. Kill Client
Enter your choice (1-2), or 'q' to return to previous menu>> 1
UserID: ADMIN NodeName:
Task 23 Communications: FSHAREMM
Memory: 3392K Open Files: 2 Logon Time: 0:03
Tran Time: 0:01 Rqst Time: 0:00 InProcess Rqst# 245 RTG_REWDEL
Press RETURN to continue...
You may notice that "NodeName:" is empty because we did not set the <instance name> c-treeRTG configuration option.
If we set <instance server="FAIRCOMS" name="pid:%p"/> as described elsewhere in the documentation, the output is:
Monitor Clients:
1. List Attached Clients
2. Kill Client
Enter your choice (1-2), or 'q' to return to previous menu>> 1
UserID: GUEST NodeName: pid:29216
Task 23 Communications: FSHAREMM
Memory: 4353K Open Files: 2 Logon Time: 0:03
Tran Time: 0:01 Rqst Time: 0:00 InProcess Rqst# 245 RTG_REWDEL
Press RETURN to continue...
Notice that "%p" is substituted with the PID of the process. Also notice that other substitutions are available. See Substitution Specifiers.
Similar information is also available in the FairCom monitoring tool.
