[dba-Tech] Any ideas

LOL

The "I" in this case isnt me. Its our head of IT services.

Martin


----- Original Message ----- 
From: "Mitsules, Mark" <Mark.Mitsules at ngc.com>
To: "'Discussion of Hardware and Software issues'"
<dba-tech at databaseadvisors.com>
Sent: Tuesday, October 21, 2003 3:52 PM
Subject: RE: [dba-Tech] Any ideas


> LOL...I thought I was the only one allowed to be "Captain Obvious":(
>
>
>
> Mark
>
>
> -----Original Message-----
> From: John Colby [mailto:jcolby at colbyconsulting.com]
> Sent: Tuesday, October 21, 2003 10:49 AM
> To: Discussion of Hardware and Software issues
> Subject: RE: [dba-Tech] Any ideas
>
>
> Uhhh... use a database?  ;-)
>
> John W. Colby
> www.colbyconsulting.com
>
> -----Original Message-----
> From: dba-tech-bounces at databaseadvisors.com
> [mailto:dba-tech-bounces at databaseadvisors.com]On Behalf Of Martin Reid
> Sent: Tuesday, October 21, 2003 10:32 AM
> To: Discussion of Hardware and Software issues
> Subject: [dba-Tech] Any ideas
>
>
> Anyone have any ideas re the following?
>
> I have a system whereby each PC in the SCCs sends in one short line per
> minute to a central server. Each line is of the form IP address, time,
> date[, user id]. The central server is only a P450 with 256Mb memory but I
> have used a P733 with the same results.
>
> When a user logs in to a PC, it writes a line to the same file on the
> central server as all the other used PCs. Each PC writes at the same
second
> each minute, but the PCs determine their second to write by chance,
> basically. Thus the incoming data for the file is reasonably well spread
> across 60 seconds.
>
> On the minute, the software on the central server renames the input file,
> thereby causing a new one to be created with the next record sent to it.
The
> central file is held on a share to which each PC has to authenticate.
>
> When enough PCs are active, and I have not been able to deduce if there is
a
> threshold figure for that number, some or most of a record may be lost.
That
> can be seen from the input files.
>
> During stress tests, when my PC was the only system communicating with the
> server, My PC could send in about 630 lines per minute and none would be
> lost. And this over a period of say an hour. However, when multiple PCs
send
> in lines, the data loss may arise with 50 PCs active. The difference is
the
> number of active network connections.
>
> As I don't believe the data is being lost on the network (I have monitored
> this and have not seen losses so far), it is most likely being lost
through
> the networking code/file system combination, and probably the former.
>
> I was wondering if anyone had a better method for collecting this
> asynchronous auditing information, one which did not lose data.
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