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Conference netcad::hub_mgnt

Title:DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:NETCAD::COLELLADT
Created:Wed Nov 13 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:4455
Total number of notes:16761

1811.0. "Slow HUBwatch with 6 X Repeaters" by OSLLAV::NILSS_P (Truth is a pathless land...) Thu Dec 22 1994 03:56

    
    
    Hi,
    
    Yesterday I installed a DEChub 900 with 6 X 32 port repeaters and
    a bridge module (DEFBA-MA).
    
    I also installed HUBwatch for Windows on a 486/50 PC with 8 Mb ram.
    
    When hubwatch was started the PC hang for a long time with a lot of 
    disk activity.
    After 30 minutes I gave up and rebooted the PC, removed 5 repeater
    modules from the HUB and restarted  hubwatch.
    Now everything was working normal i.e, it was possible to configure
    the hub and create networks and so on.
    
    Then I added more repeater modules one by one and restarted hubwatch,
    everything was looking normal up to when the 6th repeater module was
    installed.
    
    What could have caused this strange problem ??
    
    
    regards,
    
    Nils Sk�nsar
    MCS Oslo Norway. 
    
    
T.RTitleUserPersonal
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1811.1Documentation ... what a conceptROGER::GAUDETBecause the Earth is 2/3 waterThu Dec 22 1994 08:3412
From the READ_ME.TXT file supplied with HUBwatch for Windows V3.1:

HARDWARE REQUIRED FOR INSTALLATION
==================================
...
* Minimum 12 megabytes of RAM; 16 megabytes recommended for high-port
  density configuration
...

There are additional system tuning tips in this file also.

...Roger...
1811.2More performance questionsMAASUP::PORAMBOThu Jan 12 1995 14:4733
    
    
    Hello ,
    
      In regards to Hubwatch for Windows performance, I am a novice to the
    product and I am trying to determine if the performance I am seeing is
    reasonable.
    
      Running V3.1 on a 486 Laptop with 8 or 12 Meg of memory
      DECHUB 900
    	1	DECbridge900MX
    	4	DECrepeater900TM's
    	1	Decserver 90L+
    	2	DECbrouter 90's
    
      It takes approximately 6 minutes from the time I specify the agent
    unitil the screen is painted with the hub layout.  During the time 
    we are waiting, the pc's disk is active almost non-stop.
    
      
    
    My questions are:
    
    1) Is this a reasonable time period?
    
    2) Would increasing memory up to 16meg make that much of a difference
    even though it appears that we are spending lots of time with disk
    reads?
    
    3) Any other performance suggestions?
    
    
    Bob
1811.3Documentation ... what a concept, Part IISLINK::HOODI'd rather be at the PenobscotThu Jan 12 1995 15:1415
>    1) Is this a reasonable time period?

	It all depends.  If you don't mind waiting for six minutes,
	then yes, it is a reasonable time period.  Otherwise, not.

>    2) Would increasing memory up to 16meg make that much of a difference
>    even though it appears that we are spending lots of time with disk
>    reads?

The disk reads are caused by lack of memory.
4 32-port repeaters safely qualifies as high port density.
Follow the recommendations from .1

Tom Hood
HUBwatch