Is anyone set up to use anycast for internal DNS?
Good Afternoon,
I've been considering using Anycast to provide some redundancy for internal DNS lookups. Configuring DNS and subsequent slave zones in Leopard is easy enough and as I understand it, Anycast is just a way of configuring routers so that one IP address can resolve to many different machines.
I see some of the benefits of using Anycast in that we can have the same 2 dns ip addresses in perpetuity and that as long as one node is up, people will be able to get out.
So my question to you guys: Has anyone done this? If so, is there anything I need to look out for before I start? Is there something you wish you'd known before you started down this path.
I'd love to hear your experiences and read any documentation you might have kept. I thought Mr Hoffman's write up on his DNS services was really excellent btw.
Cheers,
dave
Do you have a particularly large infrastructure?
IP Anycast is usually implemented via BGP announcements from your router(s), with each router using the BGP tables to determine the 'best' server to use. If you're doing this for internal DNS then that assumes you're already running IBGP.
Even then, BGP is a pretty dumb protocol - all it does is say 'hey, here's how to get to a.b.c.d IP address'. It has no idea whether the specific server/service you're after is available at that address.
In other words, even if you setup IP Anycast via IBGP you'll still have clients routing to a dead server unless you can somehow update your BGP tables when a server goes down. Not a trivial task for most routers.
It sounds like what you really want is more load balancing than IP Anycast. There are numerous load balancers than can do this. Another option (if your DNS servers are physically close) is to use some kind of failover process so that the second server assumes the role (and IP address) of the first server should it fail (and vice versa). That option is built-in to Mac OS X Server (although it takes a little command-line jiggling to get it working).
Then again, the whole point of defining multiple DNS servers on the client is that the client will automatically fail over to alternate servers if it doesn't get a response from the first - in other words, the clients already have built-in failover for DNS (although the user will notice lookup delays when the primary server is offline).
Similar Messages
-
Does anyone know which companies use VirtualBox for Product QA testing?
Hi guys,
I am doing Software QA testing and currently looking into using virtualization tool.
Does anyone know which companies use VirtualBox for Product QA testing?
I know there are alot of companies using VMWare, but have never heard of any using VirtualBox?
Help me out with the list. Does Oracle ever use their own VirtualBox for testing their own range of products?Well, Oracle uses internally more & more VirtualBox and we see more & more companies using VB instead of VMWare.
Very similar, maybe VB better in memory management
JB -
Why using workarea for internal table is better in performance
Please tell me
why using workarea for internal table is better in performanceHi Vineet ,
Why would we choose to use an internal table without a header line when it is easier to code one with a header line?
it has following reason.
1)Separate Internal Table Work Area:
The work area (staging area) defined for the internal table is not limited to use with just one internal table.
take ex-
Suppose you want two internal tables for EMPLOYEE one to contain all records and one to contain only those records where country = USA. You could create both of these internal tables without header lines and use only one work area to load data into both of them. You would append all records from the work area into the first internal table. You would conditionally append the USA records from the same work area into the second internal table.
2) Performance Issues: Using an internal table without a header line is more efficient than one with a header line
3) Nested Internal Tables: If you want to include an internal table within a structure or another internal table, you must use one without a header line.
If this one is helpful ,then rewards me
Regards
Shambhu -
Has anyone set up gmail using apple configurator?
Does anyone know where I can find a step by step guide for email setup using configurator?
For a school that uses iPads for learning I would not set up a email for them on the iPads at all. They need to learn so have them set up an account thru gmail lets say and dedicate it for the class's. Anything school related they would use this email.
What you would need to do is have them provide the user/password in writing and also have on thier that they allow an administrator to access the account at any time if needed. Also make sure to put in thier that this email is strictly to be used for school related, class related events. It is not a personal email, not to be used for any personal activity.
This last part should be looked over by the school officials and lawyers but something of that sort will keep you out of trouble.
When you use devices such as this in education, the more you let them do the better.
The issue you will have is blocking stuff on the server side, websites ect.. -
How can I use DW for internal email
Hi all,
I am interested in using Dreamweaver to build something like email marketing, for internal corporate notifications. I want to be able to tract how many people are reading the email, and how many people use our site for ordering suplys, etc? I have never done this before, but I heard it can be done.
I am interested in knowing:
1. What's the best way to build it ( we are using images, Header, footer, links, etc.)
2. Can I use CSS
3. What is the best way to send it through email so people can view it? (we can't use an outside vendor)
Any and all information would be greatfully appreciated.
Thank you,
HDsuperglideFirst read this:
http://alt-web.blogspot.com/2010/02/html-emails-and-newsletters.html
Use an email service like Constant Contact or iContact that gives you stats about your email blasts.
Put Google Analytics on your web pages to see where traffic comes from and if it's converting to sales.
Nancy O.
Alt-Web Design & Publishing
Web | Graphics | Print | Media Specialists
http://alt-web.com/
http://twitter.com/altweb
http://alt-web.blogspot.com -
Does anyone tried creating dashboards using VSAE for SCOM 2012 r2
how can i create custom dashboard views using VSAE,
Does anyone find any tutorials on how to do that?
Can anyone help me in doing that?
Thanks & Regards, Suresh GaddamHi,
Hope the articles below can be helpful for you:
OM12 Dashboards
http://blogs.technet.com/b/mpauthor/archive/2013/07/24/om12-dashboards.aspx
System Center Management Pack Authoring Guide
http://social.technet.microsoft.com/wiki/contents/articles/15251.system-center-management-pack-authoring-guide.aspx
Regards,
Yan Li
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] -
I go to image and then image size and everytime i go to change the canvas size to inches it will not work. Is it becasue the it's the trial version?
oh ok I found out the resample but it still doesn't allow me to adjust the canvas size to pixels. The option is still in inches and it is impossible to crop quickly with it in inches
-
Set up prepaid calling card for international calls?
I have a prepaid calling card that I use for calling international. The way it works is that I have to call a 866 number, followed by entering a 10 digit code, and then proceed to calling the actual number (with international prefix codes). Is there a way to set this up as international call default so that I do not have to modify all my international contact's phone numbers to include this procedure?
Thanks.
Kspeed dial: Your smartphone can store nine
phone numbers that you can call
with a single keypress. To store a
speed dial number, touch Phone
> Menu > Speed dial setup, and
insert a number in an empty speed
dial slot.
To call a speed dial number, touch
and hold the single-digit speed dial
number in the dialer screen. -
Format Date TextField using Locale for international apps
Hello there...
I am developing an application and I want it to be easily converted to different languages.
In Brazil, we use the date like dd/MM/yyyy. In the USA, it is MM/dd/yyyy.
My question is: how can I get the text from a text field and convert it to a Calendar using a Locale (or the default Locale)? I don't want something like
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
I would like something like:
SimpleDateFormat formatter = new SimpleDateFormat(locale);
The constructor SimpleDateFormat () without arguments says it builds the parser based on the Locale, but I get a ParseException. I must always specify some parse mask.
The second issue is the deprecation of a lot of things in java.util.Date. So, I would like to use a Calendar object to store the date, and without the warnings I get when I use date.getMonth() for example.
My code is something like this:
String text = dateField.getText();
SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");
Date date = null;
try {
date = formatter.parse(text);
} catch (ParseException ex) {
ex.printStackTrace();
Calendar calendar = null;
if (data != null) {
calendar = new GregorianCalendar();
calendar.set(Calendar.DAY_OF_MONTH, date.getDate());
calendar.set(Calendar.MONTH, date.getMonth());
calendar.set(Calendar.YEAR, date.getYear());
Thanks for helping!
(Sorry the not so good english :) )My question is: how can I get the text from a text
field and convert it to a Calendar using a Locale (or
the default Locale)? I don't want something like Have you tried DateFormat.getDateInstance(int style, Locale aLocale)?
And then is your second question just how to go from a parsed date to a Calendar?
Calendar calendar = new GregorianCalendar():
if (date != null)
calendar.setTime(date); -
Configure WRT54G Wireless Router with PUBLIC IP address and use DHCP for internal computers
Hi,I have an Internet online service with 5 public IP addresses. The router and the AP are connected to a switch. I would like to configure a WRT54G wireless router with one of this IP public Address and use DHCP (with private ip address) for the computers that will connect to the AP. As the AP is connected to the switch it is possible that other wired computers that are connected to the same switch can obtain an IP address from the DHCP ?
Thansk in advance
Thanks for your help. Please correct me if Im wrong. After connecte the equipments the way you suggestI setup a static IP address (The public IP) in the WRT54GI enable DHCP in the WRT54G with a range from 10.10.0.100 to 10.10.0.200 (as an example) The gateway is the Public IP address right ? How do I route the 10.10.0.x addresses to the public IP address. Thansk again
-
Using iTunes For Multiple iPod's
Hey,
Anyone know how to use iTunes for two iPod's without the songs being erased and all that ...kind of like having two seperate library folders.
Thanks In Advance,Well there are two way to go about this.
Number 1. Having seperate windows accounts, with iTunes on both, will give you seperate libraries.
Number 2. Set both iPods to update Automatically but to only the playlists you select. This will keep your playlists on it and whatever you don't want on there off. Same goes for the other iPod.
I myself use the number 2 option for my iPod Video and my Moms Nano. The only thind you got to remember, if you plan on updating or if you added new music and want it on your iPod, is to select the new playlist you made. This options works great -
Install Sun ONE Directory Server 5,2 & how to use it for authenticate user
Good afternoon, Excuse, are newbie in the scope I am learning and putting desire to him, this in my situation I am trying to install Sun ONE Directory Server 5,2 since I understand that this it is application LDAP for Solaris, ok I want to install it to authenticate user against the system, that is to say, to be able to acces the server entering with a created user from the data base of LDAP and make think user that his created in the system. But the documentation that I finds indicates the installation of Sun ONE Directory Server 5,2 but it not clearly about how to use it for authentication. Some one have any manual step by step of Sun ONE Directory Server 5,2 installation and how to make it for authentication systems users.
I read the forum seeking for anwser and i get confuse
Thanks for the help and sorry for any inconvenient
Message was edited by:
Aku_28
Message was edited by:
Aku_28I think that I found the Sun endorsed book locations for using LDAP accounts that don't use authentication besides "crypt". I now can use an account with a "ssha" password. It can be more than 8 characters long.
Chapter 14 System Administration Guide: Naming and Directory Services
Read page 201 which is the pam.conf file pam_ldap setups. I edited my "/etc/pam.conf" file to reflect this
Chapter 7 Directory Server 5.2 2005Q4 - Administration Guide
Read page 316-318 which has a graphical technique to specify password syntax. I set it up and then tried the password by running "su - brahms". It now requires a longer password than 8 characters and it is set up to use "ssha" for that UID entry "brahms". -
I'm creating a set of values using a for loop and a shift register inside the loop. I want access to these values outside the loop as they are being created inside. When I connect a wire from the shift register to a display outside, it doesn't work. How do I do this? Thank you.
Attachments:
tamko_new.vi 29 KBI tried to create the local variable that was wired to numeric indicator inside the loop. If I try to connect this to the analog output outside the loop, the loop just starts blinking and nothing happens, am I doing something wrong? Thanks again.
Attachments:
tamko_new2.vi 29 KB -
Using Alchemy for profiling Flash
I'm new to Alchemy so I don't know if anyone has tried to use Alchemy for profiling Flash. Essentially, I was thinking that a call to QueryPerformanceCounter would give us a much more accurate timer when compared to getTimer. This would allow inline profiling of runtime functions without having to do 1000s of iterations just to overcome the 1 - 10 ms accuracy of getTimer. QueryPerformanceCounter is OS specific but then it would only be used by developers. Is this possible with Alchemy? Has anyone already invented this wheel?
Thanks,
JasonI haven't used the sampler API directly. I found this blog post which talks a little bit about the theory behind it:
http://stopcoding.wordpress.com/2008/04/26/lets-talk-about-the-flex-profiler/
Also, here is the AS code that Flash Builder uses to read data from the sampler API, and then send it via Socket connection back to the Flash Builder. It's a somewhat old version, but it's all I could find online. I don't know if it will be useful.
http://bugs.adobe.com/jira/secure/attachment/21183/ProfilerAgent.as -
Dear developers,
Since Skype was taken over by Microsoft, you managed to destroy everything this product was preferred by millions of users.
1. Why chat messages aren't delivered instantly? Why do you wait for both parties be online at the same time?
2. SMS containing specific national characters are messed up, delivered 2 times, but still illegible for the receiver, etc. Even a beginner in programming knows that one has to use Unicode for international applications, not ANSI, not anything else.
Kind regards,
Mazarin.not very much info here to go on faiz2000. hence you not
getting any help. try explaining your problem in a little more
detail.
Maybe you are looking for
-
Is it possible to lock standard abap program?
hi, i am trying to do the lock transcations. i went to sm01 and i locked se38.its working .but from pfcg its possible to go to se38(its allowing ).i want that no one can access the se38code in anyway. what can i do for this? i thought it off locking
-
Can't add transitions to either LT files or .mov
Hi, I'm trying to and some transitions for a title sequence, I've created the titles in LiveType, when I either use the LiveTYpe files or rendered out files. I can a transition into the first title but no more. Any ideas? iMac 20" Core Duo Mac OS X
-
What permission allows the changing of a file name
I have a custom ACL in which the group has the Modify and Delete permission bundles granted. When users attempt to change the filename of a file with this permissions they get an error. I see not error in the node log. What permission controls this?
-
This apple ID has not yet been used in the iTunes store" when i am trying to download applications
"This apple ID has not yet been used in the iTunes store" when i am trying to download applications
-
ITunes 7.6 installs but will not open
I successfully installed iTunes 7.6 and when i go and double click on the iTunes icon on my desktop, the program will show up in Task Manager but will not show up on my desktop. I am running Media Center on this computer and wanted to know if any oth