ADSM-L

Re: Client Compression ON

2005-09-28 08:45:15
Subject: Re: Client Compression ON
From: Bill Dourado <bill.dourado AT ALSTEC DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 28 Sep 2005 13:44:44 +0100
len,

I don't usually use client compression...but definetly tape drive
compression.
I have client compression on this one particular node, as its a remote
client,
and backup takes place over a slower connection.

My tape drives are HP LTO-2, does anybody know if I can get away with two
lots of compression ?

Bill








len boyle <len.boyle AT SAS DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
28/09/2005 13:25
Please respond to "ADSM: Dist Stor Manager"

        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Re: [ADSM-L] Client Compression ON


Johnny,
It may be ok or even a good thing to do both TSM software level
compression
and tape drive hardware compression if one is using IBM lto, at least the
later drive, tape drive. IBM told us that the lto drive do a look ahead on
the blocks of data and determine if the block should be   compressed or
not.
They said that there was no problem feeded compressed data to the tape
drive.

len
----- Original Message -----
From: "johnny cochran" <using_unix AT HOTMAIL DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Wednesday, September 28, 2005 7:52 AM
Subject: Re: [ADSM-L] Client Compression ON


> Its not recommend to have the devices perform compression and have TSM
> software level compression.
>
> Select one !    It is stated in the red book (TSM)
>
>>From: Bill Dourado <bill.dourado AT ALSTEC DOT COM>
>>Reply-To: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>>To: ADSM-L AT VM.MARIST DOT EDU
>>Subject: Re: [ADSM-L] Client Compression ON
>>Date: Wed, 28 Sep 2005 12:37:22 +0100
>>
>>Andy,
>>
>>Files were backed, basically the OS & System Objects..etc...,
>>over 2GB,     would you include these in "data that doesn't
>>compress well" ?
>>
>>Bill
>>
>>
>>
>>
>>
>>
>>
>>
>>Andrew Raibeck <storman AT US.IBM DOT COM>
>>Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>>28/09/2005 09:33
>>Please respond to "ADSM: Dist Stor Manager"
>>
>>         To:     ADSM-L AT VM.MARIST DOT EDU
>>         cc:
>>         Subject:        Re: [ADSM-L] Client Compression ON
>>
>>
>>Hi Bill, there could be any number of reasons for this. For example,
maybe
>>the backup with 0% compression occurred because no data was backed up.
You
>>show "objects -domain=-F:". If this is literally what you have coded,
that
>>would explain it, since there is no file system on Windows that goes by
>>naming convention "-domain=-F:". Or maybe no files were eligible for
>>backup. Maybe the data you backed up does not compress very well. Or the
>>second scheduled event is overriding the local options file COMPRESSION
>>setting via a schedule option.
>>
>>Regards,
>>
>>Andy
>>
>>Andy Raibeck
>>IBM Software Group
>>Tivoli Storage Manager Client Development
>>Internal Notes e-mail: Andrew Raibeck/Tucson/IBM@IBMUS
>>Internet e-mail: storman AT us.ibm DOT com
>>
>>The only dumb question is the one that goes unasked.
>>The command line is your friend.
>>"Good enough" is the enemy of excellence.
>>
>>"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 2005-09-28
>>09:21:20:
>>
>> > Hi,
>> >
>> > I have a new Windows 2000 client(FS5)  , where I have set up two
>> > schedules:
>> >
>> > FS5_F_DRIVE
>> > objects F:
>> >
>> > FS5_MINUS_F_DRIVE
>> > objects -domain=-F:
>> > (this includes C: drive and system objects..etc)
>> >
>> > In my dsm.opt file I have COMPression ON
>> >
>> > The first schedule -  I can see in the log "Objects compressed by
37%"
>> > BUT in the second "Objects compressed by 0%" .
>> >
>> > How come ?
>> >
>> > (TSM server for Windows 5.2.2.0)
>> >
>> > T.I.A
>> >
>> > Bill
>> >
>> >
>> >
>> >
>> > ******************************* Disclaimer
>>*******************************
>> > This email and any files transmitted with it contains privileged and
>> > confidential information and is intended for the addressee only. If
you
>> > are not the intended recipient you must not disseminate, distribute
or
>> > copy this email. Please notify the sender at once that you have
>> > received
>> > it by mistake and then delete it from your system.
>> >
>> > Any views expressed in this email are those of the sender and not
>> > necessarily those of ALSTEC or its associated companies.
>> >
>> > Whereas ALSTEC takes reasonable precautions to ensure this email is
>>virus
>> > free, no responsibility will be accepted by it for any loss or damage
>> > whether direct or indirect which results from the contents of this
>> > email
>> > or its attachments.
>> >
>> > ALSTEC Group Limited - Registered in England No.3939840 -
>> > www.alstec.com
>> > Registered office: Cambridge Road, Whetstone, Leicester. LE8 6LH.
>>England.
>> > Telephone: +44 (0)116 275 0750
>>
>>
>>
>>******************************* Disclaimer
*******************************
>>This email and any files transmitted with it contains privileged and
>>confidential information and is intended for the addressee only. If you
>>are not the intended recipient you must not disseminate, distribute or
>>copy this email. Please notify the sender at once that you have received
>>it by mistake and then delete it from your system.
>>
>>Any views expressed in this email are those of the sender and not
>>necessarily those of ALSTEC or its associated companies.
>>
>>Whereas ALSTEC takes reasonable precautions to ensure this email is
virus
>>free, no responsibility will be accepted by it for any loss or damage
>>whether direct or indirect which results from the contents of this email
>>or its attachments.
>>
>>ALSTEC Group Limited - Registered in England No.3939840 - www.alstec.com
>>Registered office: Cambridge Road, Whetstone, Leicester. LE8 6LH.
England.
>>Telephone: +44 (0)116 275 0750
>
> _________________________________________________________________
> Express yourself instantly with MSN Messenger! Download today - it's
FREE!
> http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
>



******************************* Disclaimer *******************************
This email and any files transmitted with it contains privileged and
confidential information and is intended for the addressee only. If you
are not the intended recipient you must not disseminate, distribute or
copy this email. Please notify the sender at once that you have received
it by mistake and then delete it from your system.

Any views expressed in this email are those of the sender and not
necessarily those of ALSTEC or its associated companies.

Whereas ALSTEC takes reasonable precautions to ensure this email is virus
free, no responsibility will be accepted by it for any loss or damage
whether direct or indirect which results from the contents of this email
or its attachments.

ALSTEC Group Limited - Registered in England No.3939840 - www.alstec.com
Registered office: Cambridge Road, Whetstone, Leicester. LE8 6LH. England.
Telephone: +44 (0)116 275 0750

<Prev in Thread] Current Thread [Next in Thread>