how multiple cpu are handled in "iRules Runtime Calculator" document

Hi Rado,

 

 

After we migrated to v10.2.0 we faced a performance issue with the command (1). We could be able to improve the performance by rewriting it to (2).

 

 

class get is retrieving the entire datagroup as a TCL list whereas class search is only returning a single record from the datagroup. I would expect class get to be a lot less efficient than class search. I'm not sure where you got that 'class get' command as i don't see it in the ProxyPassV10 page:

 

 

http://devcentral.f5.com/wiki/default.aspx/iRules/proxypassv10

 

 

Your option of using class search should be more efficient as it's using the class command's native search functionality and only returning one record.

 

 

When using the iRules Runtime Calculator Excel sheet provided by F5, could we multiply the results by 4 when we have 4 CPU devices? In the Excel sheet only the CPU cycles could be filled in, not the CPU count.

 

 

The iRule runtime calculator could use an update now that many platforms support CMP. I think you can roughly multiply the max executions by the number of CPU (or CPU cores) you have.

 

 

The results in the "Max number of requests" table refer to the HTTP requests/sec or to the Active connections?

 

 

That should be HTTP requests per second.

 

 

are we safe to use the iRule even with ASM enabled?

 

 

That's hard to say. An ASM policy can be very lightweight or very heavy. Similarly with an iRule. I would suggest doing performance testing with the customer's expected load and configuration to test the two in combination.

 

 

Aaron