throttle question

SANCopy is not aware of target performance metrics.

Hope the following information can help you

https://www.emc.com/collateral/software/white-papers/h2099-emc-clariion-san-copy-wp.pdf , page 17,

This parameter is defined on a per-session basis. Throttle values range from 1 to 10, where 1 is the slowest, 10 is the fastest, and 6 is the default value. When throttle is set to 10, the system reads from the source and writes to the destination as quickly as it can, which causes many system resources to be allocated to that session. As you reduce the throttle from 10 to 1, SAN Copy reduces the internal buffer size and inserts longer delays between I/Os. This allows the session to run with less performance impact on other applications. The throttle value can be changed after the session is created and during the progression of the session. For example, you can start a session with the throttle set to 6 and, in the middle of the session, increase the throttle to 10. When a new session is started after completion of this session, the default throttle value of 6 is retained.

Hi Roger, dynamox !

Thanks for the reply!

So the throttle setting is based on CPU ( or SP Usage ) for Source ?

Not for Bandwidth ( Network ) ?

Thanks !

Aya

Hi Ayas,

Throttle is based on SP which in tern usage CPUs of that particular SP through which the session is being run.

ayas wrote: Not for Bandwidth ( Network ) ?

If you increase the throttle value, it increases the utilization of network bandwidth as well.

Thanx

Rakesh

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glen

thanks All !

thanks

Aya