S903 palla

© 2018 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.© 2017 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
S903 - Experience Manager: Top 5 Common Pitfalls to Avoid
Ameeth Palla: Manager, AEM Customer Care | Andrew Khoury: Principal Engineer, AEM Customer Care | Mukund Palwankar: Sr. Manager, Cisco Web Platform

Customer Challenges
2
60%
Maintenance
Architecture
Configuration
Tuning
Upgrade
Performance
Testing

Best Practices (2017 Session Link)
 Tuning
 Maintenance
 Performance
 Security
 Upgrade
3

Apache Oak – Node Storage
5
JCR / Oak API
Oak Core
Node Storage
Database /
Persistence
API
Two Node Store Options
Segment - Tar Document - MongoDB
AEM AEM 1 AEM 2
MongoDB
Primary
MongoDB
Secondary
reads /
writes
reads / writes
Tar
Segment
MongoDB
Secondary
Document
Apache
Oak

Optimize AEM Architecture – Maximize Performance
Key Points to consider:
 External Datastore (File/S3/Azure)
 SegmentMK (TarMK) for Performance - Always go for this
 DocumentMK (MongoMK) - for High Availability
Official documentation:
https://docs.adobe.com/docs/en/aem/6-3/deploy/platform/data-store-config.html
https://helpx.adobe.com/experience-manager/6-3/sites/deploying/using/recommended-deploys.html
6

AEM Assets Optimization
Key points to consider:
 Replication
 Binary-less Replication – Large Asset Implementations
 Workflows
 Transient Workflows
'or'
 Offloading
 Network & Storage
 NodeStore on High Performance SSD
https://helpx.adobe.com/experience-manager/6-3/assets/using/performance-tuning-guidelines.html
https://helpx.adobe.com/experience-manager/6-3/assets/using/best-practices-for-assets.html
7

New Asset Workflow Processes
 Adobe’s Image Transcoding Library
 Core Image handling functions (Encoding, Transcoding, Image resizing, etc)
 Advantages over other 3rd party libs (performance, scalability and quality)
 PDF Rasterizer
 Accurate Output
 Selective & Quality thumbnails
 Faster processing - Less memory usage
 Both supported in AEM 6.3 and 6.4
 Both compatible with Offloading and Transient Workflow
Official Documentation:
https://helpx.adobe.com/experience-manager/6-3/assets/using/imaging-transcoding-library.html
https://helpx.adobe.com/experience-manager/6-3/assets/using/aem-pdf-rasterizer.html
11

AEM Maintenance
For more information on AEM Maintenance Tasks, please refer:
https://docs.adobe.com/docs/en/aem/6-3/administer/operations/operations-dashboard.html
13
Maintenance Task Tar MongoDB Default Window
Version Purge Yes Yes Configurable
Workflow Purge Yes Yes Weekly
Audit Log Purge Yes Yes Configurable
Data Store GC Yes Yes Weekly
Online Revision Clean-Up Yes No Daily
Offline Revision Clean-Up (aka Tar
Compaction - 6.2 and older)
Yes No Weekly
Log rotation Yes Yes Daily

AEM 6.4 Maintenance
14
 Enhanced logging
 Version purge and Audit purge stop at end of maintenance window
Maintenance Task Tar MongoDB Maintenance Window
Tail Compaction Yes No Daily
Lucene File Cleanup Yes Yes Configurable
Project Purge Yes Yes Configurable
Ad-hoc tasks purge Yes Yes Configurable
Continuous Revision GC No Yes Every 5s
Oak-run reindexing Yes Yes As needed

AEM Implementation at a glance
 Our AEM journey started about 5 years ago with AEM 5.6
 Our Goal
 Create Multi-tenant Platform – “Platform of choice” for all customer, partner, employee facing web sites
within Cisco
 Where are we now?
 16+ Web Sites including Cisco.com are already on the platform and many more are on their way
 Savings of $2M in operational cost year over year
 8 TB content, 1K+ content authors, 10K daily activations
 That makes us one the largest AEM Sites implementation in the world

AEM Best Practices
 Regular Upgrades & Maintenance Jobs
 Regular OAK upgrades, We recently migrated to AEM 6.3
 Weekly Maintenance Jobs (Workflow Purge, Offline Compaction, Data Store Garbage Collection)
 Performance Tuning & Process Optimization
 Dedicated Data Stores, Index Store Separation
 Migration to Physical Host
 Moved from NAS to SAN (and will move to SSD soon)
 Custom Indexes, Workflow offload
 Application Monitoring
 We have deployed AppDynamics across our architecture stack
 Great tool for Load Testing
 DevOps
 Agile Methodology, Monthly Releases
 Completely automated release process (Rally, Eclipse, Git, SonarQube, Jenkins, Artifactory, uDeploy)
 12000 regression test cases with every release (Selenium,Cucumber, Neoload, Calabash)

Primary
AUTHOR
AUTHOR II
APACHE / DISPATCHER
Authors
Shared Assets
CDN
DC1 DC2 DR
APACHE /
DISPATCHER
(5 Nodes)
APACHE /
DISPATCHER
(5 Nodes)
APACHE /
DISPATCHER
(5 Nodes)
AEM Publish
(4 Nodes)
AEM Publish
(4 Nodes)
AEM Publish
(4 Nodes)
InternalNetwork
Protected Net
DMZ
Site Visitors
AUTHOR III
Activation
Authors
Content
Archival
AEM - High Level Architecture
AEM Author AEM Publish
• Content Sharding (Horizontal Scaling Architecture)
• Content Archival
• Caching Architecture & CDN
• Resiliency & DR

0
5
10
15
20
25
0 100 200 300 400 500 600 700 800 900 1000
Houroftheday(24H)
First Slowness
Second
Slowness
Unplanned
Downtime
AEM Author – Impact of implementing best practices
Q1FY16 Q2FY16 Q3FY16 Q4FY16 Q1FY17 Q2FY17 Q3FY17 Q4FY17 Q1FY18 Q2FY18 Q3FY18
Index Folder Storage
Separation
Virtual to Physical Host
Migration
Dedicated data
store
OAK Upgrade
Content Sharding
AEM 6.0 Upgrade
AEM 6.3 Upgrade
We are here
Content Archival
Oak
Upgrade

Performance: Implementation
Site Performance
 Make back end service calls fault tolerant
 Set timeouts
 Cache
 Exponential back-off algorithm
 Optimize client-side performance
 CSS in html <head>
 JS in end of <body>
 Minify and GZip client libraries
20
Documentation:
http://helpx.adobe.com/experience-manager/kb/optimize-aem-site-performance.html

Performance: Implementation
Author Instance Performance
 Reduce the total components per page
 Avoid nesting paragraph systems
21
Documentation:
http://helpx.adobe.com/experience-manager/kb/optimize-aem-site-performance.html

Performance: Caching
22
CDNBrowser
AEM
Dispatcher
AEM
Documentation:
https://helpx.adobe.com/experience-manager/kb/optimizing-aem-site-caches.html

Caching: Browser
23
CDNBrowser
AEM
Dispatcher
AEM
Has the file been modified?
If-Modified-Since: Wed, 21 Mar 2018 06:00:00 GMT
No.
304 Not Modified
Send me /content/test.html
GET /content/test.html HTTP/1.1
Here’s /content/test.html, cache it
for 5 minutes.
200 OK
Cache-Control: max-age=300
Last-Modified: Wed, 21 Mar 2018 06:00:00
GMT
…
 Cache-Control: max-age=300
 Last-Modified: Wed, 21 Mar 2018 06:00:00 GMT

 Same HTTP Headers as browser
 Use a CDN that supports stale-while-revalidate and stale-if-error
 GZip compress everything except pre-compressed file formats
Caching: CDN
24
CDNBrowser
AEM
Dispatcher
AEM

 Leverage Cache-Control header & disable flush agents
 Leverage re-fetching dispatcher flush
Caching: Dispatcher
25
CDNBrowser
AEM
Dispatcher
AEM

 Send headers
Cache-Control: max-age=300
Last-Modified: Wed, 21 Mar 2018 06:00:00 GMT
Performance: Caching
26
CDNBrowser
AEM
Dispatcher
AEM

Indexing in AEM
 Define indexes for custom queries
 Use Oak lucene property indexes
 Be specific – avoid rules that index everything (e.g. nt:base nodetype)
For more information:
https://docs.adobe.com/docs/en/aem/6-3/deploy/platform/queries-and-indexing.html
https://helpx.adobe.com/experience-manager/6-3/sites/developing/using/troubleshooting-slow-queries.html
27

SECURITY

User / Group Permissions
 Never modify out-of-the-box group or user permissions
 Instead add groups as members of out-of-the-box groups
 Define permissions against groups, not users
 Leverage rep:glob type ACLs to allow multi-tenancy
https://helpx.adobe.com/experience-manager/6-3/sites/administering/using/security.html
29

Service Users
 Use in application code instead of “admin” session
 Define ACLs directly for the service user
 Leverage ACS Commons “Ensure Service User”
Official documentation
https://helpx.adobe.com/experience-manager/6-3/sites/administering/using/security-service-
users.html
30

User Administration
 6.3 Enhancements
 Closed User Group feature modified
 6.4 Enhancements
 Assets UI - Closed User Groups support (6.3 SP1 CFP2)
 New user properties UI
31

UPGRADE

In-Place vs. Migration
In-Place
Pros
 Preferred upgrade method
 Follow official documentation
 Simpler for large deployments
Cons
 Author instance downtime
33
Data Migration
Pros
 Potentially avoid downtime
 Simple for small systems and lower
environments
Cons
 Complex and time consuming for large
environments
 Unofficial method – power users only
 Error prone

Code Upgrade
1. Install to fresh AEM target version
2. Disable /libs overlays under /apps
3. Update maven dependencies – Uber jar version
4. Use unit testing
5. Test and find broken API calls
 New in 6.4 - Pattern Detector
 Runs on older AEM version
 Detects potential 6.4 upgrade-breaking changes
 Generates a report
35

Upgrade Testing
 Test upgrade on a copy of production
 Regression test whole application
 Re-run load and stress tests
36

Upgrade to AEM 6.3
 Upgrade to 6.3 in two steps
 Platform upgrade – 3 Author Instances, 12 Publish instances, Took 48 hours
 Migration to Touch UI
 We decided to go with In-place Upgrade
 Great partnership with Adobe team
 We were invited to participate in beta testing of AEM 6.3
 Very quick turnaround time on defect resolution
 Early results
 Compaction times down by 40%
 Much improved performance as compared to AEM 6.0

Takeaways
 Store large files in an External Datastore
 Tune configurations to suit your use case for optimal performance
 Have a robust maintenance and system monitoring plan
 Upgrade to the latest version
 TEST comprehensively before moving to production
38

Resources
Forums.Adobe.com
HelpX.Adobe.com
@AdobeExpCare
1.800.497.0355
Common critical AEM issues: https://helpx.adobe.com/experience-manager/kb/common-critical-AEM-issues.html
Customer Care Office Hours: https://helpx.adobe.com/customer-care-office-hours.html
39

Upcoming Sessions
Upcoming Sessions:
 Customer Care Booth Sessions
 S219: Adobe Experience Manager Rock Stars: New strategies and top tips
 Wednesday – 2:30 to 3:30 pm
 S222: Breaking the chains: Moving your digital experiences to the cloud
 Thursday – 1:30 to 2:30 pm
40

Take the Survey to win!
(Survey section of the mobile app)
DAY 1
Bash
Experience
DAY 2
Signed football
helmet
DAY 3
Amazon Echo Show
& Cloud Cam Bundle
$10Starbucks
Card
SESSION PRIZE
one per session

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