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E-mail Technical Coordinators Meeting

The E-mail Technical Coordinators meeting on November 7, 2007, addressed several issues including recent outages caused by runaway IMAP sessions, disk contention from backups, power failures affecting server memory, and configuration errors. A new email server cluster is being deployed for enhanced fault tolerance across data centers, utilizing round-robin DNS for load balancing. Additionally, server-side filtering rules for managing incoming emails and the testing of ClamAV alongside existing antivirus software were discussed. Active two-factor authentication (M.Key) was also emphasized.

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E-mail Technical Coordinators Meeting

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Presentation Transcript

  1. E-mail Technical Coordinators Meeting Chris Bongaarts Steve Siirila Nov 7, 2007

  2. E-mail Outages • Series of partial outages last week of October, various causes • Runaway IMAP sessions • Disk contention due to backups • Opal server memory shortage due to 90 Church power failure • One case of configuration error (emerald) • Interactive server (garnet): Intermittent IMAP/POP service on 10/15, 11/5, and 11/6 due to hung up IMAP sessions • Worst-case uptime (emerald): 99.85%

  3. Clustering • New e-mail server cluster being deployed (red.tc.umn.edu) • Will span data centers for maximum fault tolerance • Initially using round-robin DNS for load-balancing IMAP/POP/SMTP traffic

  4. Server-side Filtering • List of rules applied to incoming email • If (criteria) then (file in folder or forward) • Criteria based on To, From, size, etc. • Manage via myaccount page • NOT available for interactive accounts • Demo

  5. Server-side Anti-virus • Testing ClamAV in addition to current AV software (McAfee/NAI) • Statistics from testing will determine whether to use one, the other, or both • Motive: potential cost savings

  6. Bits ‘n’ Bytes • Shared folders in beta • About 35 participants so far • http://www.umn.edu/dirtools/share • Bug: folders not under ~/mail must be converted manually; fix forthcoming • M Key (Two-factor authentication) • Most production OIT/CCO servers cut over • Oracle database cutovers in progress • 512 people have active M Keys

  7. Chris Bongaarts cab@umn.edu 612-625-1809 Steve Siirila sfs@umn.edu 612-626-0244 Internet Services isgroup@umn.edu ‘Till next month…

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