[j-nsp] Multi Core on JUNOS?
Chad.Myers at theice.com
Wed Oct 21 15:05:14 EDT 2015
On Oct 9, 2015, at 10:08 AM, Jeff Haas <jhaas at juniper.net> wrote:
>> On Oct 9, 2015, at 9:45 AM, Adam Chappell <adam.chappell at gmail.com> wrote:
>> I can imagine that making rpd MT is probably hard to the point of almost
>> not being worth the benefit (with current REs), unless one can adequately
>> break down the problem into divisable chunks of work that are insensitive
>> to execution order. BGP peer route analysis, comparison against import
>> policy and current RIB might fall into that category, but not without a lot
>> of locking and potential for races.
> It is non-trivial work. But it is also somewhat easier to incrementally introduce threading than it is to split large hunks of code and workflow into multiple processes.
> We're not going into deep technical detail on mailing lists such as these at the moment. The work is in progress.
Please don't go the IOS/EOS/non-Junos method for rpd where each protocol is completely independent and isolated from the others. It is extremely helpful to be able to do things like put communities on static routes. Even protocols that don't use communities can leverage them in the export policy, the community just isn't announced. Ditto for import policies.
Sacrificing that flexibility and simplicity to multithread rpd and shifting to explicit route redistribution with limited route attributes per protocol would be a huge loss.
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