[c-nsp] high performance open source DHCP solution?

[Ruslan Pustovoytov]

Also you can increase lease-time, or create pool of servers and add 
these servers in your relay agent configuration.



Lincoln Dale ?????:
> On 20/07/2011, at 12:24 PM, Rogelio wrote:
>
>   
>> The free DHCP solution, ISC, seems to be having scaling issues (i.e.
>> handling only about 200 DHCPDISCOVER and 20 DHCPRENEW requests), and I
>> was wondering if anyone had any open source suggestions of solutions
>> that could scale much better?
>>
>> (Ideally, I could find a free version of a solution like Nominum, but
>> I know that's asking for much.)
>>
>> Anyone have any suggestions?
>>     
>
> one suggestion i have is that i'd be surprised if the ISC DHCP server is somehow limited to the 200 / 20 numbers you state.
> the order of "200 requests/sec" is a round number that is awfully close to the IOPS of a modern 7200rpm drive.
>
> which makes me think that the ISC code is likely doing a fsync() and thats why you're seeing this magic 200 number.
>
> a simple way to make it go faster would be to try it out on a SSD.
> but likely there are options for tuning said dhcp server code such that it delays or batches fsync, or can operate with an in-memory index instead.
>
> all of the above is pure speculation.  i neither run a DHCP server or infrastrcture, but i have had experience in tuning systems that require consistently stored persistent data.
>
>
> cheers,
>
> lincoln.
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
>
>