using barcode font in vb.net Pulling It All Together in C#

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Pulling It All Together
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ChapTEr 11
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Outlook 2003/2007 Configured: RPC Proxy End Point: mail.contoso.com Msstd:mail.contoso.com
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Certificate Principle Name: mail.contoso.com SAN Names: mail.contoso.com autodiscover.contoso.com Outlook.contoso.com Outlook Anywhere Hostname: mail.contoso.com Web Service URL s mail.contoso.com/ews/.. mail.contoso.com/oab/..
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Outlook.contoso.com
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FIGURE 11-19 Proposed Contoso architecture
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Fabrikam Case Study
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The second, more complex case study from 2 is Fabrikam. As shown in Figure 11-20, Fabrikam has two main datacenters that will host Exchange services for all of their other sites. The Mailbox servers on the Denver site will host mailboxes for users in Phoenix, Portland, and Denver. The Mailbox servers on the Miami site will host mailboxes for user located in London, Toronto, and Miami. In the Denver and Miami datacenters Fabrikam has deployed two hardware load-balanced Client Access servers, and the Mailbox servers are configured in a DAG. The network between the datacenters is adequate to host all client traffic both for everyday operations and in the event of a failover. One of the key requirements for the Exchange 2010 deployment was providing a site-resilient solution. Therefore, Fabrikam has decided to migrate from their two Exchange 2007 Single Copy Clusters to a single DAG that spans both sites as shown in Figure 11-21.
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524 ChapTEr 11 Designing High Availability
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In case of a Denver site failover, DAC mode is enabled and an alternate witness server is configured for a server on the Miami site.
Phoenix
London
Denver
Miami
Portland
FIGURE 11-20 Fabrikam logical view
Toronto
Denver
Miami
Witness Server DAG IP: 10.10.128.30
Alternate Witness Server DAG IP: 10.128.130.30
FIGURE 11-21 The Fabrikam high-availability deployment configuration
The Fabrikam Exchange 2007 deployment team followed best practice and chose to use a separate namespace for each Active Directory site. Fabrikam users in Denver access OWA using https://mail.denver.fabrikam.com/owa, whereas users in Miami use https://mail.miami .fabrikam.com/owa. To reduce confusion and support requests, Fabrikam has decided to consolidate the namespace and only instruct users to use https://mail.fabrikam.com for OWA, EWS, and IMAP communication. They have chosen to use GSLB to load-balance
Pulling It All Together ChapTEr 11 525
mail.fabrikam.com and autodiscover.fabrikam.com and configure the GSLB to send client computer connections to the site that is geographically closest. For example, a user connecting over the Internet from Atlanta will be directed to the IP address for the Miami Client Access servers; a user connecting from Fresno will be directed to the Denver Client Access servers. In the event that a client is connected to a site that does not host the active copy of the user s mailbox, the Client Access server will be able to use the connectivity between the datacenters because the DAG has been configured to allow cross-site direct connect. Fabrikam has approximately 7,000 mailboxes evenly distributed between the two sites. Twenty-four databases will be created, and each will handle almost 300 mailboxes, all with a 1-GB storage quota. The database high-availability plan defines that each database will have two copies on the primary site and one copy on the secondary site. Table 11-8 summarizes the database high-availability plan. The plan does not provide for three mailbox database copies at each site; therefore, the team has chosen to deploy RAID-protected storage for all of their mailbox database storage.
TABLE 11-8 Fabrikam s Mailbox Database Copy High-Availability Plan
DENVER-MB01A
DENVER-MB01B
MIAMI-MB01A
MIAMI-MB01B
DAG01-DB1 DAG01-DB2 DAG01-DB3 DAG01-DB4 DAG01-DB5 DAG01-DB6 DAG01-DB7 DAG01-DB8 DAG01-DB9 DAG01-DB10 DAG01-DB11 DAG01-DB12 DAG01-DB13 DAG01-DB14 DAG01-DB15 DAG01-DB16 DAG01-DB17 DAG01-DB18 DAG01-DB19 DAG01-DB20
526 ChapTEr 11
Active Copy 1 No Copy Copy 2 Active Copy 1 No Copy Copy 2 Active Copy 1 No Copy Copy 2 Active Copy 1 No Copy Copy 2 Active Copy 1 No Copy Copy 2
Copy 1 Active Copy 2 No Copy Copy 1 Active Copy 2 No Copy Copy 1 Active Copy 2 No Copy Copy 1 Active Copy 2 No Copy Copy 1 Active Copy 2 No Copy
Copy 2 No Copy Active Copy 1 Copy 2 No Copy Active Copy 1 Copy 2 No Copy Active Copy 1 Copy 2 No Copy Active Copy 1 Copy 2 No Copy Active Copy 1
No Copy Copy 2 Copy 1 Active No Copy Copy 2 Copy 1 Active No Copy Copy 2 Copy 1 Active No Copy Copy 2 Copy 1 Active No Copy Copy 2 Copy 1 Active
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