That helps a great deal, thank you. Although I'll still need to know some of these limits, it looks like I'll have to go to regmon and find out.
Brett, I appreciate the thought and understand that the leases are recorded in the DB, but it won't be one scope. It'll be multiple scopes. Thanks folks. This helps out a great deal. Al -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Patrick Sent: Monday, January 03, 2005 11:50 PM To: [email protected] Subject: Re: [ActiveDir] DHCP If you are only concerned about the RSL - does it help to know that in XP and greater this isnt an issue? http://support.microsoft.com/default.aspx?scid=kb;en-us;292726 steve ----- Original Message ----- From: "Brett Shirley" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, January 03, 2005 8:45 PM Subject: RE: [ActiveDir] DHCP > > So I got the info I needed out of band. > > If you manage the entire 10.*.*.* as a single scope I suspect* that you > won't have any worries. I happen to know that DHCP uses an ESE database, > and looking at my sample DHCP DB (~66k records), it is quite clear** this > is where it stores IPs it gives out. Ergo the size of the IP blocks is > irrelevant to usage of registry, only the number of scopes you want to > define. > > I suspect* (there is that word again), that just the definition of the > scope is in the registry, but (I'm 87% sure of this part) the actual per > IP storage is pushed off to ESE / JET Blue (no, not the same JET that is > in Microsoft Access, that's JET Red). > > Cheers, > Brett Shirley > > * suspect = really that just means I'm making this all up. > > ** by clear, I mean the columns are called "HardwareAddress", "IpAddress", > "LeaseTerminates", "ServerName", etc ... > > On Mon, 3 Jan 2005, Brett Shirley wrote: > >> Is the 10.*.*.* block a single scope? >> >> Cheers, >> Brett >> >> This posting is provided "AS IS" with no warranties, and confers no >> rights. >> >> >> On Mon, 3 Jan 2005, Roger Seielstad wrote: >> >> > Well, my friend, you could always break out a copy of RegMon from >> > Sysinternals and build a dozen or so representative scopes out on a lab >> > box. >> > That should give you the per scope cost info you're after. >> > >> > >>From there, it seems like the number you really want is the maximum >> > >>registry >> > size for a Win2k3 implementation. >> > >> > Personally, I never got the 80/20 split jazz. I always do 50/50 (or >> > 100% on >> > one server in my current config, but that's a whole other story - >> > redundancy >> > isn't terribly important for DHCP with the boxes I manage). >> > >> > -------- >> > Roger Seielstad >> > E-mail Geek & MS-MVP >> > >> > > -----Original Message----- >> > > From: [EMAIL PROTECTED] >> > > [mailto:[EMAIL PROTECTED] On Behalf Of Mulnick, Al >> > > Sent: Monday, January 03, 2005 10:13 AM >> > > To: [email protected] >> > > Subject: RE: [ActiveDir] DHCP >> > > >> > > Thanks John. I saw that one as well, but it doesn't tell me >> > > enough information about how much of an impact I can expect >> > > on the registry. I understand the paging file and the RSL, >> > > but I can't get a solid amount of information about a) what >> > > to expect to be put in the registry *exactly* and >> > > b) what exactly each registry entry can possibly take in >> > > terms of size. >> > > >> > > A thousand scopes? Nice to hear, but that doesn't solve the >> > > problem for me. >> > > >> > > >> > > For more background, I currently have similar running across >> > > four servers in two network sites. No problem. What I want >> > > to do is isolate two different business types. As you can >> > > imagine from the domain name, we're a financial institution >> > > and we have retail branches across all lines of business. We >> > > also have back-office needs. To make this more reliable, I >> > > need to take into account the 8th layer and design >> > > accordingly. My current track is to simplify by separation >> > > and put the branch scopes on two servers and the >> > > rest/exceptions on the other two. To do that, I need to know >> > > the limits. >> > > The additional benefit of knowing the quantifiable benefits >> > > is the ability to predict capacity and lifespan of the >> > > solution. That obviously plays into lifecycle management >> > > planning of the solution. Due to the business nature of >> > > finacial organizations, I have to plan for twice the capacity >> > > of current. >> > > In practice, that means that I have to at least know the >> > > capacity abilities of the current solution or the future >> > > solution enough to know that if an acquisition occurs, I can >> > > either deploy more capacity else know that I can use the >> > > current to that scale. >> > > >> > > The docs I've found so far, including the one you posted and >> > > the information from Jorge were too high-level for what I'm >> > > after. I appreciate them but I still need additional >> > > information to make this design right. >> > > >> > > Thoughts? >> > > >> > > Thanks John, >> > > >> > > Al >> > > >> > > -----Original Message----- >> > > From: [EMAIL PROTECTED] >> > > [mailto:[EMAIL PROTECTED] On Behalf Of John >> > > Reijnders >> > > Sent: Monday, January 03, 2005 11:29 AM >> > > To: [email protected] >> > > Subject: RE: [ActiveDir] DHCP >> > > >> > > Hi Al, >> > > >> > > Looking in the Windows Server System Reference Architecture >> > > you can read: >> > > >> > > "... scaling the DHCP service involves network infrastructure >> > > issues for most enterprises." -> However, according to your >> > > question this does not apply for your network. Lucky you ;-)! >> > > >> > > The following quote relates to your question: >> > > >> > > "You can create an unlimited number of scopes on a DHCP >> > > server. However, a DHCP server should ideally host no more >> > > than 1,000 scopes. When adding a large number of scopes to >> > > the server, be aware that each scope creates a corresponding >> > > need for additional disk space for the DHCP server registry >> > > and the server paging file. >> > > >> > > Before deployment, you should test your DHCP servers on the >> > > network to determine any limitations and abilities of your >> > > hardware and to see whether the network architecture, >> > > traffic, and other factors affect DHCP server performance." >> > > >> > > However, it still doesn't answer it. However, there is a >> > > specific article about planning DHCP networks that might (not >> > > sure) deal with this topic. >> > > This is the URL: >> > > http://www.microsoft.com/resources/documentation/WindowsServ/2 >> > > 003/standard/p >> > > roddocs/en-us/Default.asp?url=/resources/documentation/Windows >> > Serv/2003/stan >> > > dard/proddocs/en-us/sag_DHCP_imp_PlanningNetworks.asp >> > > >> > > Good luck! >> > > John Reijnders >> > > >> > > -----Original Message----- >> > > From: [EMAIL PROTECTED] >> > > [mailto:[EMAIL PROTECTED] On Behalf Of Mulnick, Al >> > > Sent: maandag 3 januari 2005 17:08 >> > > To: [email protected] >> > > Subject: RE: [ActiveDir] DHCP >> > > >> > > Thanks Jorge, I did see and read that. Unless I'm missing >> > > something in there, it doesn't answer the questions however. >> > > It does give some ideas, but it's not detailed enough to help. >> > > >> > > Al >> > > >> > > -----Original Message----- >> > > From: [EMAIL PROTECTED] >> > > [mailto:[EMAIL PROTECTED] On Behalf Of >> > > Jorge de Almeida Pinto >> > > Sent: Monday, January 03, 2005 11:02 AM >> > > To: [email protected] >> > > Subject: RE: [ActiveDir] DHCP >> > > >> > > Hi Al, >> > > >> > > Give a try with the W2K3 Deployment Kit - Designing Network >> > > Services -> >> > > http://www.microsoft.com/resources/documentation/WindowsServ/2 >> > > 003/all/deploy >> > > guide/en-us/DNSBC_DHC_OVERVIEW.asp >> > > >> > > Regards, >> > > Jorge >> > > >> > > ________________________________ >> > > >> > > From: [EMAIL PROTECTED] >> > > [mailto:[EMAIL PROTECTED] On Behalf Of Mulnick, Al >> > > Sent: maandag 3 januari 2005 15:15 >> > > To: [email protected] >> > > Subject: [ActiveDir] DHCP >> > > >> > > >> > > >> > > I'm looking for more precise information for DHCP sizing and >> > > I'd appreciate any real-world information as well. >> > > >> > > What I'm trying to find out is how much registry space one >> > > DHCP server requires at max capacity. I realize that a DHCP >> > > server puts information in the registry for each scope. What >> > > exactly it's supposed to put in there under any given >> > > circumstance is a little less clear. How much space it >> > > requires or a way to estimate how much possible space could >> > > be used is totally unclear. I did find some information >> > > about RSL (max registry size >> > > basically) and about Microsoft's case study with their DHCP >> > > usage. That's not enough information though. >> > > >> > > I'd like to find out what my limits are. For example, I'm >> > > interested in what would happen if I put the entire 10.x.x.x >> > > netblock on a single DHCP >> > > server. Before you tell me that shouldn't happen because of fault >> > > tolerance or network topology, I can tell you that network >> > > bandwidth is not a problem I suffer from. Fault tolerance >> > > for DHCP is often done via settings and the 80/20 split >> > > concept, although at some point it's possible that one server >> > > would have to achieve 100% during a failure scenario. Also, >> > > what is 80% capacity for one server? >> > > >> > > Enough of the rambling... If anyone could point me in a >> > > better direction, >> > > I'd appreciate it. At worst, if you have any tools that >> > > would help to measure registry impact, that would be >> > > appreciated. I haven't investigated that route yet, but >> > > suspect that sysinternals likely has something I can use. >> > > I'm interested in the theoretical and the folks that wrote the code. >> > > >> > > Questions I need to answer: >> > > What is the max possible impact of the DHCP application on >> > > the registry? >> > > What is the practical limit of a DHCP server in quantifiable terms? >> > > >> > > Additional question from me: >> > > Does anyone have any documents they can point me to that give >> > > the possible registry impact when scaling a DHCP server? >> > > >> > > >> > > TIA >> > > >> > > (Happy New Year BTW to those following the Gregorian >> > > Calendarical system ;) >> > > >> > > >> > > >> > > >> > > >> > > >> > > Al Mulnick >> > > >> > > "I strive to be unique. Just like everybody else" >> > > >> > > >> > > >> > > >> > > This e-mail and any attachment is for authorised use by the intended >> > > recipient(s) only. It may contain proprietary material, >> > > confidential information and/or be subject to legal >> > > privilege. It should not be copied, disclosed to, retained or >> > > used by, any other party. If you are not an intended >> > > recipient then please promptly delete this e-mail and any >> > > attachment and all copies and inform the sender. Thank you. >> > > >> > > List info : http://www.activedir.org/mail_list.htm >> > > List FAQ : http://www.activedir.org/list_faq.htm >> > > List archive: >> > > http://www.mail-archive.com/activedir%40mail.activedir.org/ >> > > >> > > This e-mail and any attachment is for authorised use by the intended >> > > recipient(s) only. It may contain proprietary material, >> > > confidential information and/or be subject to legal >> > > privilege. It should not be copied, disclosed to, retained or >> > > used by, any other party. If you are not an intended >> > > recipient then please promptly delete this e-mail and any >> > > attachment and all copies and inform the sender. Thank you. >> > > List info : http://www.activedir.org/mail_list.htm >> > > List FAQ : http://www.activedir.org/list_faq.htm >> > > List archive: >> > > http://www.mail-archive.com/activedir%40mail.activedir.org/ >> > > List info : http://www.activedir.org/mail_list.htm >> > > List FAQ : http://www.activedir.org/list_faq.htm >> > > List archive: >> > > http://www.mail-archive.com/activedir%40mail.activedir.org/ >> > > >> > > >> > >> > List info : http://www.activedir.org/mail_list.htm >> > List FAQ : http://www.activedir.org/list_faq.htm >> > List archive: >> > http://www.mail-archive.com/activedir%40mail.activedir.org/ >> > >> >> List info : http://www.activedir.org/mail_list.htm >> List FAQ : http://www.activedir.org/list_faq.htm >> List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ >> > > List info : http://www.activedir.org/mail_list.htm > List FAQ : http://www.activedir.org/list_faq.htm > List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
