it briefing agenda 9/15/05

Information Technology at Emory

Information Technology DivisionTechnical Services

IT Briefing Agenda 9/15/05

• Various Updates• CM Demo• SS Password Reset• SMTP-Auth & Eagle

Mail Update• NetCom Q&A

• Karen Jenkins• Laura Moriarty• Marcy Alexander• Ken Guyton

• Paul Petersen


General Updates

Karen Jenkins



General Updates• Microsoft Agreement

– Should have details presented in Oct. or Nov. by Wade Sanner

– Working on getting price down, healthcare • IT Alert (first phase)

– New process to communicate service outages and performance problems

– Existing listserv’s will be replaced with [email protected]

– Please subscribe if you wish to receive these email notifications



General Updates (cont.)• Premier Support

– Lines are in … waiting on filling Stu’s position so it is fully staffed before rollout

• Oracle names to OID– Didn’t shut down onames on 8/1– Will definitely shut down on 9/30!– Convert users using tool on Software Express

• Eagle mail client polling– Please work with your users to change polling to

10+ minutes– Sent list to 21 local support teams using Manage IT

…..



…you were not alone …


Change Management Demo

Laura Moriarty


Self-Service Password Reset

Marcy Alexander



Self-Service Pwd Change

• Business process defined by 4/04• Technical team wrote initial code

and code by 8/04• Code revised to new specs 11/04• Template built 4/05• Production 6/05 • Ready for marketing 9/05




• Goal of initiative – provide customer self-service tool to manage account access without HD intervention




• https://passwordtest.service.emory.edu

• test url against production environment – will migrate to password.service.emory.edu

• Maintenance Weekend 9/18


Eagle Mail Performance

An opportunity to make it fasterUpdate September 2005

The UNIX Group, Technical Services, ITD



Architecture

• Eagle mail consists of three services

– Relay – Delivery– Reading



Architecture

Relay Spam

Read/Deliv

Virus

IMAP proxy

Webmail

firewall

disk2 4

6

3

4

LDAP routingother svrs

clients

Relay

3



The Situation

1 2 3 4 5

Read/Delivery Servers

100% CPU Utilization

Users per server

95%

50%

90% 90%

60%

6

50%



The Situation

1 2 3 4 5

Read/Delivery Servers

100% CPU Utilization

12851

4157

12787

8304

97

Users per server

95%

50%

90% 90%

60%

6

88

50%



Conclusions from Last Time

• High-frequency SELECTs are killing us



Hypothesis

• When clients check for new email they send a SELECT

• (They should send a NOOP)• Users are setting their clients to

check for email every minute



Final Notes

• Webmail checks every five minutes

(and does use SELECT)• Some clients have a drop-down

menu to select this time (1-min, 5-min, etc.)



Our Plea

• See if your users are polling < 5 min

• 10 min is better• You can always manually check

for new email• Help them change their polling

time if needed



New Data

• We are logging SELECTs• More analysis



Something Funny

• A funny thing happened on the way to the user-migration fest...

• A familiar name showed up



And a surprise

• He only uses webmail



New Data

• Webmail does a SELECT every five minutes

• But does an EXAMINE as soon as possible after the SELECT

• How can we see this?



Clustering of SELECTs

t

SELECT(user, mailbox)

SELECT(user, mailbox)

Δt



Clustering of SELECTs

Δt

29s 30s 31s . . .. . .



Clustering of SELECTS97 Users - Select Clustering 2005 Aug 23

0

500

1000

1500

2000

2500

3000

3500

0 60 120 180 240 300

Interval in seconds

SE

LE

CT

co

un

ts



Clustering of SELECTs88 users - Select Clustering (2 days from 23 Aug 2005)

0

200

400

600

800

1000

1200

1400

1600

0 60 120 180 240 300

Interval in seconds

SE

LE

CT

co

un

ts



Clustering of SELECTS12851 users - Select Clustering (19 Aug 2005 - 5 days)

0

5000

10000

15000

20000

25000

0 60 120 180 240 300 360

Interval in seconds

SE

LE

CT

co

un

ts



Conclusions

• 60-second polling is a problem• The webmail upgrade put us over

the edge



Solutions

• Checking in on the heavy users• (9-days of data, 55-s to 75-s)• Analyze the Webmail code• Architecture changes• More hardware



The UNIX Group

• Chris Alexander• Bruce Anderson• Karla Fields• Amanda Gagnon• Ken Guyton• Curt Tucker• Eric Van Wieren



NetCom Q&A

?Questions?Questions

it briefing agenda 9/15/05

Documents