Brown University Exchange 2003 Molly Baird Manager, Windows-Novell Services.
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Brown University Exchange 2003 Molly Baird Manager, Windows-Novell Services
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Transcript of Brown University Exchange 2003 Molly Baird Manager, Windows-Novell Services.
Brown University Exchange 2003
Molly Baird
Manager, Windows-Novell Services
Brown definitions
CIS: Computing and Information servicesProvides central IT services, central helpdesk,
SMTP + email services, file + print, DNS, networking
DCC: Departmental Computing CoordinatorPrimary IT support person in Administrative and
Academic departments. Focus on desktop and other client-side support issues
Exchange: current statistics
Mailboxes: 12,000 mailboxes migrated/added over 12
months 83% migrated (95% students migrated)
Hardware: Two 2-node clustered Exchange mailbox
servers Four load-balanced Exchange front-end
servers (Outlook Web Access, IMAP, POP) 250 Gig total storage across both clusters
Brown’s central Active DirectoryAD.brown.edu
Departments
People
Systems & Services
CIS
Human Resources
Engineering
Shared Accounts
Faculty/Staff
Students
Groups/Lists
Workstations
Exchange: internal routing
Server 1 Clients Server 2
Two kinds of databases comprise an Exchange “information store”
Stores content available to MAPI clients
Direct access by IMAP, POP, Outlook Web Access clients
MAPI Store Internet ContentStore
On-the-fly conversion of content when accessed by alternate client
MAPI: Messaging Application Protocol Interface
2-way communication with Exchange information stores
Changes in calendar, tasks, contacts, message folders
Communicates with Global Catalog servers to retrieve Global Address List (GAL)
Communicate with free/busy public folder to update calendar free/busy time
Exchange collaboration: calendaring
Shared auto-schedulable conference rooms and other resources
View free/busy time of colleagues Configure permissions on calendar folder to
permit others to see your personal calendar Delegate access to manage calendars
Exchange collaboration: public folders
Public Folders misnomer Departmental public folders Not replacement for file storage Vacation calendars Shared vendor contacts Shared lists Collections of project files
Exchange collaboration: shared IDs
Old model: shared password to access email in shared mailbox
New model: managed by group access to shared mailbox
Elimination of shared-password access Group access *can* be managed by DCCs if
acceptable by shared mailbox sponsor CIS not needed to update access to shared
mailbox
Brown’s central Active DirectoryAD.brown.edu
Departments
People
Systems & Services
CIS
Human Resources
Engineering
Shared Accounts
Faculty/Staff
Students
Groups/Lists
Workstations
Exchange: SMTP mail routing
BrownSMTP servers
Worldwide SMTP servers
Exchange servers
Other departmentalEmail servers
Brown legacy: “spraying” email
Hotmail
LegacyPostoffce
server
YahooMail
SMTP fromoutside world
Brown SMTPservers
Exchange: sizing
Database size based on SLAs to recover single database based on current backup practices
Many small databases on each Exchange server
Corruption in single database affects only 300 – 400 faculty/staff --or--- 500 – 600 student mailboxes
Exchange: maintenance
Need for maintenance indicated in server syslogs
Offline maintenance scheduled as needed Test maintenance outcome on test/recovery
Exchange server
Exchange: recovery
Exchange is a transactional database Database activity logged in transaction logs in
real-time Transactions later committed to database at a
lower processor priority. Single database recovery
Recover last full backup copy ofdatabase
Recovery and replay of successive incremental transaction-log backups
offline
online
Exchange: costs
Permanent Staff costs FTE hired for migration and maintenance (me!)
One-time Costs: Migration: 1 ½ FTE staff split between administrative and
technical duties for 6 months License: Microsoft Core Campus CAL required License: OS and Exchange software: $11,000 HW: four front-end servers: $30,000 HW: Staff cluster: $60,000 HW: Student cluster: $60,000 HW: SAN/storage for clusters: $70,000 Provisioning changes: coincided with Provisioning overhaul
Total one-time cost: $231,000 Total recurring cost: 1 FTE + MS Core CAL
Exchange: 2000 – 2003 upgrade
Outage of less than 60 minutes across all servers over a span of four weeks
Performed by one full-time staff member Additional “functionality testing” by full-time
desktop services staff Benefits:
improved Outlook Web Access client improved recovery options increased IIS security
Exchange: growth
Add new back-end clusters and distribute mailboxes across new server(s)
Increase mailbox quota size
Exchange: what limits growth
Current database sizes limited by aggressive SLAs
Backup methods aren’t sufficient for growing enterprise data needs
Eliminating “backup to tape” component will enable faster restores
“why can’t I have a 1 Gig mailbox like Gmail?” Recovery of an entire server of 1-Gig
mailboxes using today’s methods would take a month.
