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E-mail Technical Coordinators Meeting

E-mail Technical Coordinators Meeting. Chris Bongaarts Steve Siirila December 7, 2005. E-mail Server Load Issues. Spike in worm and virus e-mail traffic Excessive Inbox hits Excessive Inbox sizes Increased SSL usage Server capacity limitations SAN I/O capacity limitations

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E-mail Technical Coordinators Meeting

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  1. E-mail Technical Coordinators Meeting Chris Bongaarts Steve Siirila December 7, 2005

  2. E-mail Server Load Issues • Spike in worm and virus e-mail traffic • Excessive Inbox hits • Excessive Inbox sizes • Increased SSL usage • Server capacity limitations • SAN I/O capacity limitations • Backups running into peak hours • Auto-filing running into peak hours

  3. E-Mail Performance Statistics (Mon 11/28) • 62,781 active users • 43 connects/user average • 10MB average size Inbox • 497MB average I/O per user • 31TB I/O total • Top 10 users transferred 1.5 TB

  4. Possible E-mail Performance Improvements • More aggressive auto-filing • Place more limits on frequency of accesses • IMAP/POP daemon tuning • Webmail application tuning • System and/or SAN I/O tuning • Run backups earlier to avoid peak hours • Migrate to new Inbox format (long-term) • Investigate auto-expunge option for users • Additional hardware (coming)

  5. Inbox Auto-Filing • 23,536 eligible users notified • 17,280 users auto-filed total (i.e. mailbox scanned, possibly filed) • 1,603 users auto-filed on 12/5 • 1,175 mailboxes contained eligible messages • 37,032 (3GB) of 526,909 (77GB) messages filed • Percentage of message data auto-filed down from 10% to 4%

  6. New Webmail Options • New Webmail available from JAWS • One or more additional Webmail applications being deployed soon • Looking at non-PHP-based open-source implementations

  7. Phase-out of clear-text passwords • 791 users remain insecure • 666 TC client/server (aquamarine) • 125 TC premium (garnet) • Morris conversion is complete

  8. Top 10 Unauthenticated SMTP gateway IPs • mail.nursing.umn.edu • fever.cidrap.umn.edu • ahcweb05.ahc.umn.edu • wwws3.csom.umn.edu • ucs.micro.umn.edu • omwl-b4-bp.lib.umn.edu • rudi2.reshalls.umn.edu • wwws1.csom.umn.edu • omaweb.stu.umn.edu • x94-206-167.law.umn.edu

  9. Bits ‘N Bytes • Must move equipment out of CHRC • User-maintained whitelist/blacklist enhancements coming soon • Block list reports now mailed at correct time (after 6am)

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

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