New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Reece Little DVM


Reece Little DVM
GPA 3.57


Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Class Notes
25 ?




Popular in Course

Popular in ComputerScienence

This 9 page Class Notes was uploaded by Reece Little DVM on Sunday September 27, 2015. The Class Notes belongs to COM S 652 at Iowa State University taught by Staff in Fall. Since its upload, it has received 19 views. For similar materials see /class/214510/com-s-652-iowa-state-university in ComputerScienence at Iowa State University.

Similar to COM S 652 at ISU

Popular in ComputerScienence




Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/27/15
Directory Service for DCE Com S 652 Department of Computer Science Iowa State University What is Directory Service A service that takes the name of some object and returns information about the named object Examples 7 persons namegt that person s telephone number 7 host name gtinformation about that host 7 RFC server namegt binding information for that server An effective directory service is critical to a distributed environment The DCE Directory Service Its main use today is allowing clients to nd servers 7 Optionally supports a more general service Provides a uni ed global namespace 7 Resources in one cell can be named and accessed from other cells Integrated with and used by other DCE services Also called Name Service DCE Directory Service Twotier Architecture External Directory Service Cell Directo Cell Directo Servrce Service External Directory Service 1 Internet DNS Domain Nam e System Cell Directo Cell Directo Serv1ce Service External Directory Service 2 GDS X500 Global Directory Service X500 Cell Directo Cell Directo Serv1ce Service The DCE Namespace Global Namespace DNS or GDS XSOO Cell Cell Namespace Namespace The Namespace in DCE Global Namespace DNS or GDS XSOO Cell Namespace Ce Namespace Global Namespace Domain Name System Global Directory Global Root Service X 500 I I I I I I I cUK 0T5 EDU c ORG UK 0 SF IBM OUCAMBRIDGE AUSTIN CZUSOZOSFOUZCAMBRIDGE AUSTJN IBM COM Cell Namespace Cell Root subsys SecumyNamespace DFS Namespace pmhmumpw ace hp den DCE Names 0 Special tokens DCE namespace root is Cell namespace root is Example global names austin ibm comhostsplum CUSOO SF OUCambridge ho sts archie Example cellrelative name hostsplum Cell Directory Service CDS Manages directory within DCE cells Optimized for local access 0 Partitioned distributed database service Provides good scalability to support large DCE cells Easier to manage Sophisticated update mechanism 0 Supports replication Relies on caching to improve performance Components of CDS Client Client CDS Client Overview of a Simple CDS Lookup A lication CDS Client Clearing house CDS CDS Server 4 Global Directory Agent A Client Client Application CDS Application CDS Clerk CDS Clerk CDS Client CDS Client GDA s Role in Lookup exampleosforg austin ibmcom Summary The Directory Service is central to DCE Consists of Cell Directory Service CDS Global Directory Service GDS andor Domain Name System DNS Global Directory Agent GDA Integrated with RPC Easy to access from applications


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Janice Dongeun University of Washington

"I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.