asp.net scan barcode android The Role of Mailbox Servers in Software

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The Role of Mailbox Servers
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E-mail communications systems, including the Exchange Server platform, are store-andforward systems Mailboxes are the persistent way-point for messages; therefore, mailbox servers are essential to the operation of any Exchange organization This chapter focuses on the administration of Exchange Typical (basic) installations of Server 2007 mailbox servers, along Client Exchange Server 2007 include with supporting concepts Access three roles: Client Access (CA), (CA) When you re installing Exchange Hub Transport (HT), and MailBox (MB) role Server 2007 on a server, the Typical Installation option installs the Mailbox (MB) server role along with the Client Access (CA) and Hub Hub Transport Transport (HT) roles Custom (HT) installations could add the Unified role Mailbox Messaging (UM) role to those or (MB) include some subset of those four role For details on installation options for Exchange the Mailbox role, see 4
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Administering Exchange Server 2007
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The Continuous Cluster Replication and Single Copy Cluster installation options will force you to dedicate servers to just the Mailbox Server role If you want to deploy highly available Mailbox Server roles, also see 19
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Exchange servers performing either the active or passive clustered mailbox role must be isolated onto dedicated servers without other Exchange roles
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A number of services run on Exchange Server 2007 mailbox servers If there are other Exchange roles in addition to the Mailbox server role installed, the services that must be running may be different than those for a dedicated mailbox server It is important to understand the services that constitute each server role One of the most crucial services is the Information Store Service on the mailbox server
Introducing the Microsoft Exchange Information Store Service
Figure 6-1 shows the Windows PowerShell with the Get-Service cmdlet used to get the status of all the services whose names include the word Exchange :
Get-Service *Exchange*
Note that the Microsoft Exchange Information Store Service (MSExchangeIS) is one of the services running This service is the heart of the functionality of the Exchange Server 2007 Mailbox server role This service supports hosting storage groups, the databases they contain, and in turn the mailboxes and public folders those databases contain To get more information on the status of this service and its dependencies, you can supply its name to Get-Service and then use the Format-List formatter to display more attributes of the service This is shown in Figure 6-2
Get-Service MSExchangeIS | Format-List
This figure shows that the MSExchangeIS service depends on {NtLmSsp, RPCSS, LanmanWorkstation, LanmanServer, EventLog}, which are: Windows NT LAN Manager Security services provider Remote Procedure Call System Service
6:
Administering Mailbox Servers
FIGURE 6-1
Exchange Services
PART III
LAN Manager Workstation service LAN Manager Server service Event Log service
FIGURE 6-2
Exchange Service attributes
Part III:
Administering Exchange Server 2007
The Storeexe Process and Its DLLs
Figure 6-3 shows the tasklist command, which is a regular Windows command not unique to PowerShell Three forms of tasklist are used here:
tasklist /fi "imagename eq storeexe" tasklist /fi "imagename eq storeexe" /svc tasklist /fi "imagename eq storeexe" /m
The tasklist command may be considered to be similar in some ways to the graphical Task Manager The first form shows the memory usage; the second form uses the /SVC switch to request that tasklist show the services provided When tasklist is given the /M switch, it shows the modules of software used by the process (DLLs) Note where several DLLs are used by storeexe to accomplish the job of hosting the Microsoft Exchange Information Store Service in this figure One of these is called mdbroledll, which is a part of the software used to support the Mailbox Database (MDB) role Another DLL shown in the figure is mdbtaskdll, which also does part of the job
Starting and Stopping the Microsoft Exchange Information Store Service
The critical part of running storeexe is that it runs smoothly However, knowing how to start and stop this service may be required for certain preventative maintenance and/or disaster recovery procedures As with most tasks in Exchange 2007, you can use the Microsoft Management Console (MMC) Services console snap-in or, as a newer approach, you can use Windows PowerShell As PowerShell s Get-Help *-Service can reveal, several cmdlets may be used for service control, as shown in Figure 6-4
FIGURE 6-3
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