Re: [Veritas-bu] multiplexing

[Steve]

I wrote this up awhile ago to help me remember all the places that MPX / Multi streaming can be set. I have not reviewed it for awhile but hope it helps.

 

Multiplexing

 

 

Bpstulist –   Displays the Attributes of of one Storage unit

 

Bpstulist–L

Example:

Bpstulist –L

 

**        Check the the "Maximum Multiplexing per Drive" and the "Number of   Drives"

 

 

Bpcllist – Displays the Class Attributes.

 

            Bpcllist   -allclasses –L -U

            Example:

                                    Bpcllist -allclasses –L -U

 

**        Check the   "Media Multiplexing"

 

 

Tpconfig – Displays the Tape device information

 

            Tpconfig –d

 

**        Check to make sure all drives are available.

 

 

Bpconfig – Displays the Global Configuration attributes for Netbackup

 

            Bpconfig –U –L

 

**        Check the "Maximum Jobs per Client" and "Max Drives this Master"

 

 

Bpclient – Displays the Client specific configuration information.

 

            Bpclient –client (Client Name) –L

            Example:

                                    Bpclient –client Homer –L

 

**        Check the "Maximum Jobs this Client". This setting over-rides the global setting "Maximum Jobs per Client"

 

 

Multistreaming

 

 

Bpstulist –  Displays the Attributes of of one Storage unit

 

Bpstulist –label (Storage Unit Name) –L –U

Example:

Bpstulist –label TestSTU –L –U

 

**         Check the "Maximum Multiplexing per Drive"

 

 

Bpcllist – Displays the Class Attributes.

 

            Bpcllist   (Class Name) –L

            Example:

                                                Bpcllist TestClass –L

 

**          Check the "Limit Jobs Per class" and the "Media Multiplexing"

 

 

Bpconfig – Displays the Global Configuration attributes for Netbackup

 

            Bpconfig –U –L

 

**        Check the "Maximum Jobs per Client

 

Steve

On 6/23/06, Hindle, Greg <[EMAIL PROTECTED]> wrote:

And where is the settling for multi streaming?



Greg

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Paul
Keating
Sent: Friday, June 23, 2006 11:32 AM
To: veritas-bu@mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] multiplexing

just the opposite.
multiplexing is the practice of writing multiple backup jobs
simultaneously to one tape/drive, interleaving segments of each backup
on the tape.

Multiplexing is beneficial when you have new technology tape drives that
write 40+ MB/s natively, and clients that just can't push that much data
out.
In most cases with new tape drive technology the problem is that
tapedrives are TOO fast, rather than not being fast enough.

If you want to pull multiple streams of data from one client and
"stripe" it across multiple drives, that is known as multi-STREAMING.

Paul


--
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto: [EMAIL PROTECTED]] On Behalf Of Hindle,
Greg
Sent: June 23, 2006 11:21 AM
To: veritas-bu@mailman.eng.auburn.edu
Subject: [Veritas-bu] multiplexing


Can someone explain what this does? How can I backup data and have it
stripped across more drives to speed a back up faster? We are having a
"discussion" about this and how multiplexing works versus data
streaming.
Thanks
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