Concurrent hits limitation

[M S]

We tested large numbers on failover DHCP and it didnt cut it. We went
for split scope in the end for numbers involved.

On 1/18/10, Bunny Singh <jump2fly82 at yahoo.com> wrote:
>
>
> We are using dynamic DNS update and running two scsi disk on RAID-1. We are
> having  IBM X3650 server with 4 gb RAM.
>
> How many IP addresses do you have among your 800 subnets? What's your
> lease time? What's your *target* for DHCP updates (Request/Ack) per
> second?
>
> We have around 2, 00,000 Ip's. Our lease time is 4 days, Target hits
> (DORA) will be 5000 per second.
>
> Actually we are in to IPTV services so clients booting their STB's several
> times in a day.
>
> Also Please suggest is the server failover for the huge IP database is good
> or  we will put the servers (without running failover protocol) behind the
> Loadbalance in Active Standby state.
>
> Regards
> Daljit Singh
>
>
> --- On Mon, 1/18/10, sthaug at nethelp.no <sthaug at nethelp.no> wrote:
>
>
> From: sthaug at nethelp.no <sthaug at nethelp.no>
> Subject: Re: Concurrent hits limitation
> To: dhcp-users at lists.isc.org, jump2fly82 at yahoo.com
> Date: Monday, January 18, 2010, 12:13 PM
>
>
>> I want to know about the limitation in DHCP server. Actually we are
>> running dhcp on failover mode with 800 subnet and it will be going to
>> expand.
>>
>> I need to know how many hits (concurrent connections) dhcp services can
>> handle.
>
> Heavily dependent on your disk subsystem. Also on whether you use dhcpd
> to perform dynamic DNS updates.
>
> Handling DHCP requests is *disk intensive*. A good RAID subsystem with
> lots of battery backed cache, or a solid state disk, will do wonders.
>
>
> How many IP addresses do you have among your 800 subnets? What's your
> lease time? What's your *target* for DHCP updates (Request/Ack) per
> second?
>
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
>
>
>
>

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