How to make SLP changes reflect in already initiated duplication jobs ?

[anash7]

Hello,

I am using SLPs to take backup to disk and then duplicate it to tape. However, the no. of active duplication jobs was equal to the no. of tape drives I have in my infra. I have made few modifications to the multiplexing parameters in the policies and storage unit. Could someone let me know how to make these changes reflect in the already initiated duplication jobs which are in pending state at the moment.

I have 6 tape drives and only 6 duplication jobs go active. Media multiplexing in the policies is set as 5, no. of concurrent tape drives is set as 6 and multiplexing in storage unit is set as 5.

[Marianne]

Seems you need to look at TAPE_RESOURCE_MULTIPLIER SLP setting.

See: https://www.veritas.com/support/en_US/article.v84182756_nbu_core_admin_web

[Nicolai]

You won't gain anything with multplexing, if yore system is fast enough to keep tape drives streaming.

 If not already done, set the following buffers setting below, this will improve tape drive performance with at lest 30%

NUMBER_DATA_BUFFERS = 256

SIZE_DATA_BUFFERS = 262144

https://www.veritas.com/support/en_US/article.000076278

[tunix2k]

Hi,

if you backup to disk the resulting images are always non-multiplexed. The number of streams are written in parallel to different images. On tapes the max number of streams will be combined to a multiplexed images. Tapes are not able to be written in parallel.

You can't duplicate from non-multiplexed to multiplexed images.

 Best you can do is to followe @Nicolai to get best tape performance.

ciao

Martin

[RiaanBadenhorst]

To answer your question about how to change already iniitiated SLP jobs, you can follow this note.

https://www.veritas.com/support/en_US/article.000010265

Please note the other forum user's guidance about the effectiveness of your plan though.