[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference azur::mcc

Title:DECmcc user notes file. Does not replace IPMT.
Notice:Use IPMT for problems. Newsletter location in note 6187
Moderator:TAEC::BEROUD
Created:Mon Aug 21 1989
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6497
Total number of notes:27359

268.0. "How to get Shared MIR access?" by COOKIE::KITTELL (Richard - Architected Info Mgmt) Tue Aug 21 1990 01:44

I must be missing a trick. Should two processes, either on the same node
or on different nodes of the same cluster, be able to access a MIR at the
same time?

It appears that once one of the processes (A) has done a read_instance_key and
read_attr_data, then the same calls issued from the other process (B) will
fail with "file still in use". Note that process (A) has completed
its operation and is sitting at the MCC> prompt. Should process (B) still
get FILEINUSE?

The open file quota is over 100 for both processes.


T.RTitleUserPersonal
Name
DateLines
268.1Are you using DFS to access MIR files?TOOK::GUERTINWherever you go, there you are.Tue Aug 21 1990 12:3813
    The MIR code opens files with shared everything (read, write, delete,
    update).
    
    The only time I've ever seen this happen is when DFS is used to
    access the file(s).
    
    DFS apparently does not support shared write to files.  Therefore, the MIR
    routines do not support DNS use for file access.  If you are NOT using
    DFS to access the files, I need to know.  Also, note that DFS access
    to read-only files (such as the Dictionary files) from MCC may work, but
    is not supported.
    
    -Matt.
268.2DFS access the culpritCOOKIE::KITTELLRichard - Architected Info MgmtTue Aug 21 1990 14:045
Thanks Matt, that was it. Even though I was running MCC in two windows from
the same node, the disk was DFS-mounted from elsewhere.

Sharing works fine when run on a local disk.