ADSM-L

Re: Session Statistics

2000-03-16 11:17:49
Subject: Re: Session Statistics
From: "Marian L. Dalton" <marian.dalton AT CMPCO DOT COM>
Date: Thu, 16 Mar 2000 11:17:49 -0500
   The elapsed processing time for a session includes more than just the actual 
data
transfer.  Your log doesn't show any compression on these sessions, but when we 
had
compression turned on the aggregate rate on some of our old servers (PC 
servers, not
ADSM servers)  was really low because they spent so much time compressing the 
data
before it got sent down the line that the elapsed time iwas huge (we ended up
turning compression off  on those boxes until more real data was loaded).  I 
suspect
there are other things happening either at the server, or maybe more other 
traffic
on the network link you moved to?, that are affecting the total elapsed time.
   Marian Dalton
   Central Maine Power

John Naylor wrote:

> I am trying to get my head around what session statistics are actually telling
> me, in
> particular what actually makes up
>
> 1) network data transfer rate
> 2) aggregate data transfer rate
>
> Adsm manuals say :-
>
> network data transfer rate.  The data transfer rate calculated by dividing
> the total number of bytes transferred by the data transfer time. For
> example, the time spent transferring data over the network.
>
> aggregate data transfer rate.  The data transfer rate is calculated by
> dividing the total number of bytes transferred by the elapsed processing
> time.
>
> This seems a pretty straightforward definition, but I am sure there must be 
> more
>  to it than that because what I
> am seeing is that an improvement in network transfer rate does not always mean
> an improvement in aggregate
> transfer rate.
> Here is an example from a server using a particularly slow bit of network.
> I changed the server tcpip address in the dsm.opt so that the backup would 
> use a
>  faster network route and the
> data transfer rate improved, but the aggregate transfer rate was actually 
> worse.
> All ideas welcome
>
> 03/09/2000 08:27:31
> ANE4952I (Session: 16434, Node: BASSD2)  Total number of objects
>  inspected:  841,745
>
> 03/09/2000 08:27:31
> ANE4954I (Session: 16434, Node: BASSD2)  Total number of objects
>  backed up:    2,308
>
> 03/09/2000 08:27:31
> ANE4958I (Session: 16434, Node: BASSD2)  Total number of objects
>  updated:          0
>
> 03/09/2000 08:27:31
> ANE4960I (Session: 16434, Node: BASSD2)  Total number of objects
>  rebound:          0
>
> 03/09/2000 08:27:31
> ANE4957I (Session: 16434, Node: BASSD2)  Total number of objects
>  deleted:          0
>
> 03/09/2000 08:27:31
> ANE4959I (Session: 16434, Node: BASSD2)  Total number of objects
>  failed:           4
>
> 03/09/2000 08:27:31
> ANE4961I (Session: 16434, Node: BASSD2)  Total number of bytes
>  transferred:     4.09 GB
>
> 03/09/2000 08:27:31
> ANE4963I (Session: 16434, Node: BASSD2)  Data transfer time:
>          35,727.15 sec
>
> 03/09/2000 08:27:31
> ANE4966I (Session: 16434, Node: BASSD2)  Network data transfer
>  rate:          120.17 KB/sec
>
> 03/09/2000 08:27:31
> ANE4967I (Session: 16434, Node: BASSD2)  Aggregate data transfer
>  rate:        114.52 KB/sec
>
> 03/09/2000 08:27:31
> ANE4968I (Session: 16434, Node: BASSD2)  Objects compressed by:
>                 0%
>
> 03/09/2000 08:27:31
> ANE4964I (Session: 16434, Node: BASSD2)  Elapsed processing time:
>           10:24:48
>
> ANE4952I (Session: 24528, Node: BASSD2)  Total number of objects
>  inspected:  809,623
>
> 03/16/2000 08:43:23
> ANE4954I (Session: 24528, Node: BASSD2)  Total number of objects
>  backed up:    3,810
>
> 03/16/2000 08:43:23
> ANE4958I (Session: 24528, Node: BASSD2)  Total number of objects
>  updated:          0
>
> 03/16/2000 08:43:23
> ANE4960I (Session: 24528, Node: BASSD2)  Total number of objects
>  rebound:          0
>
> 03/16/2000 08:43:23
> ANE4957I (Session: 24528, Node: BASSD2)  Total number of objects
>  deleted:      1,341
>
> 03/16/2000 08:43:23
> ANE4959I (Session: 24528, Node: BASSD2)  Total number of objects
>  failed:           1
>
> 03/16/2000 08:43:23
> ANE4961I (Session: 24528, Node: BASSD2)  Total number of bytes
>  transferred:     4.11 GB
>
> 03/16/2000 08:43:23
> ANE4963I (Session: 24528, Node: BASSD2)  Data transfer time:
>          25,772.44 sec
>
> 03/16/2000 08:43:23
> ANE4966I (Session: 24528, Node: BASSD2)  Network data transfer
>  rate:          167.38 KB/sec
>
> 03/16/2000 08:43:23
> ANE4967I (Session: 24528, Node: BASSD2)  Aggregate data transfer
>  rate:        102.35 KB/sec
>
> 03/16/2000 08:43:23
> ANE4968I (Session: 24528, Node: BASSD2)  Objects compressed by:
>                 0%
>
> 03/16/2000 08:43:23
> ANE4964I (Session: 24528, Node: BASSD2)  Elapsed processing time:
>           11:42:27
>
> Thanks
> John
>
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