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Open Mic Webcast:Web Content Management Migration - Best practices and planning for Migrating deployments
1.
© 2014 IBM
Corporation Powered by IBM SmartCloud Meetings Web Content Management Migration - Best practices and planning for Migrating deployments
2.
2 © 2014
IBM Corporation About Us Lee Berry - Systems Architect, WCM Lab, ADL Sydney leeberry@au1.ibm.com Anuradha Chitta – WCM and Portal Support, ISL India anchitta@in.ibm.com Vinayak Tavargeri- Support Manager – Facilitator for AP Open Mics vtavargeri@in.ibm.com
3.
3 © 2014
IBM Corporation Agenda: Overview Migration Paths Migration Best Practices Migration modifies your data in place Library Import and Export Syndication in the migration process Cross Version Syndication Managed Pages considerations Planning for changes to content during migration Q&A
4.
4 © 2014
IBM Corporation Overview Plan ─ Most of your time needs to be spent in planning your migration. ─ Standlone or cluster, Local or Remote ─ Hardware and software prerequisites ─ VP considerations and much more.. Prepare ─ Prepare your Source and Target environments according to migration guidelines Migrate and Customize ─ Make sure your custom themes and skins and custom apps are working with the newer specs ─ Migrated elements are not automatically upgraded to use features that are available in the new version. ─ Taking advantage of new features that were not available in the earlier portal requires extra attention after migration is complete. Validate ─ Make sure post migration tasks are completed and your source and target server look and behave similar. Deliver
5.
5 © 2014
IBM Corporation Migration Paths Supported Paths: 7.0 → 8.5 8.0 → 8.5 6.1 → 8.5 (Not supported) Migration is not supported across editions: – For example, – WebSphere Portal Enable Version 7.0.x → WebSphere Portal Enable Version 8.5, – WebSphere Portal Express Version 7.0.x → WebSphere Portal Extend Version 8.5 Migration is supported only from the two latest fix pack levels for any listed offering. So if you don't have the latest fix pack then install it before moving forward. You cannot upgrade the source portal with a fixpack after migration if you intend to re-migrate the JCR.
6.
6 © 2014
IBM Corporation Migration – (Do's and Dont's) Migrating between different operating systems is not supported. For example, – Windows → Unix (Not supported) You can migrate from an older version of an operating system to a newer supported version of that operating system, or from a 32–bit version of an operating system to a supported 64–bit version of that operating system Migrating between different Databases is not supported – Source DB2 → Target Oracle (Not supported) Cell Name and Node Name needs to be same to avoid application deployment issues during migration. Migration to Empty portal is not supported. Disable Automatic Synchronization
7.
7 © 2014
IBM Corporation Migration – Best Practices Plan your migration well - PLAN, PLAN, PLAN... Ensure that you install the latest available fixpacks and cumulative fixes on both the source and target servers. Backup your database and file system. Disable JCR text search on both source and target servers during migration. When migrating WCM, remove any locks to prevent issues at a later stage of migration. Search collections need to be exported and deleted on the source, which are to be imported into target server once migration completes. If WAS Pre/Post Upgrade task is running into OOM, please use this option to increase the heap: – -javaoption -Xmx1024m
8.
8 © 2014
IBM Corporation Migration – Best Practices Reduce the size of your JCR DB by deleting unneeded content versions and history. JCR Database schema has been revamped in 8.0+ – Less number of tables, uses WIDE tables which are READ optimized. – Dynamic table creation is replaced by rows in WIDE tables. Maintain the health of the DB for better migration performance. – Oracle - Disable auto space advisor task to prevent deadlocks during migration – DB2 - Increase transaction logging space as needed. - Run reorgchk and runstats for better query execution plans during the migration process Restart migration from where it left off with -Dwp.migration.framework.resume=<resume point> Example: -Dwp.migration.framework.resume=deploy-portlets For troubleshooting, use -DskipCleanup="true" to preserve work folder – If using both parameters, make sure to clean the contents of wp_profile/ConfigEngine/config/work/ folder
9.
9 © 2014
IBM Corporation Migration – Best Practices Managed Pages is enabled by default on a fresh 8.0 and 8.5 install of Portal. If you are migrating from Version 8.0, managed pages is automatically enabled after you complete migration. If you are migrating from Version 7.0, managed pages is automatically disabled, and it is recommended to enable managed pages after migration to take advantage of new features, such as - syndication and versioning of pages, and the ability to manage pages in projects In Version 8.x, if the name of a web content library is the same as the URL context of a virtual portal, you can experience incorrect rendering behavior. To prevent this issue, rename the library to a different name before you perform the migration. Automatic syndication is disabled during migration. Validate the syndication pairs before resuming syndication on the target servers.
10.
10 © 2014
IBM Corporation Migration modifies your data in place Whether you are performing a remote or local migration
11.
11 © 2014
IBM Corporation In Place Migration In 6.0, all data was exported from one server and imported into another From 6.1 the Release & JCR domains are migrated in place Migration irreversibly alters the data in the connected database ─ This is the database that the migrating server is connected to Absolutely ensure you are migrating a clone of your production database
12.
12 © 2014
IBM Corporation In Place Migration – What can go wrong? Problem Prevention Cure Upgrading the production servers database Don't connect the migration server to the production database. Ensure that migration doesn't have the privileges to alter production data, or that it cannot even make the connection to the production instance Shut down production and restore the production database from backup Restoring more than the JCR domain during post migration data update * Verify that your restore procedure is only affecting the JCR instance Migrate again Failed backup or restore procedure Practise the process before commencing migration None, data is lost. * Post migration data update requires the JCR domain to be restored to the latest image of the previous versions data... some customers have inadvertently reverted the migration of other database domains by restoring them at the same time
13.
13 © 2014
IBM Corporation Library Import / Export A popular choice in migration, but is its popularity deserved?
14.
14 © 2014
IBM Corporation Library Import / Export Import / Export is designed to archive and share design libraries It was never designed to be a general purpose migration tool You can import libraries from earlier releases ─ Subject to limitations described on the next slide ─ Version matrix matches supported migration paths ─ Generally two major releases e.g. 6.1 → 8.0 Import / Export is much slower than migration ─ Since it must save and restore every single field in the system ─ In place migration is selective about the data it updates Despite the limitations, Import / Export remains a popular choice!
15.
15 © 2014
IBM Corporation Library Import / Export - Limitations Migration Import / Export Live Content Yes Yes Drafts Yes No Version History Yes No Projects Yes No Deleted Items Yes No User Profiles (Categories & Keywords) Yes No Portlets & Settings Yes No Resource Environment Yes No WebSphere Variables Yes No Other Portal Features Yes No Other Application Server Features Yes No
16.
16 © 2014
IBM Corporation Library Import / Export - Warning The popularity of export and import stems from its simplicity It only requires one infocenter section to describe!
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17 © 2014
IBM Corporation Library Import / Export - Warning The popularity of export and import stems from its simplicity It only requires one infocenter section to describe! However, it can be dangerous! There is the potential for data corruption if care is not taken with referential integrity
18.
18 © 2014
IBM Corporation Library Import / Export – Referential Integrity Library Import / Export is designed to share design libraries which generally have only inbound references (no external dependencies) Export will export all references... However, Import can only import references which can be resolved at the time of the import The process will complete, but the references will be cleared Recommendations Use migration or cross version syndication instead! Import & export ALL libraries together
19.
19 © 2014
IBM Corporation Cross Version Syndication WCM migration has never been easier!
20.
20 © 2014
IBM Corporation Cross Version Syndication Only available on 7.0 and newer Follows the same supported paths as migration Replaces the “post migration data update” procedure Can be used to migrate web content only ─ Slow because every item is syndicated separately ─ Or you can migrate initially to speed things up Functions exactly the same as syndication between servers of the same version ─ The behavior is determined by they syndicator, so for example 7.0 to 8.5 will function the same as 7.0 to 7.0. So new syndication features or behaviors will not be exposed You can choose to syndicate live items only, or all items, so there really is no good reason to use import / export (from 7.0 onwards)
21.
21 © 2014
IBM Corporation Syndication in the Migration Process The infocenter describes how to migrate a single cluster, but how should we tackle the migration of a multistage syndicated deployment?
22.
22 © 2014
IBM Corporation Syndication in the Migration Process When migrating a deployment with syndication we don't recommend migrating each server individually Rather migrate the upstream syndicator and use syndication to propagate changes
23.
23 © 2014
IBM Corporation Syndication in the Migration Process – Data Update A key concept in syndication is that it relies on the syndicator and subscriber agreeing on the identity of every item Now we have cross version syndication, data update is only for 6.1.x sources 6.1.x → 7.0 also supports web content only migration 6.1.x → 7,8.x migration process does not deterministically preserve identity So... After data update from 6.1.x all downstream subscribers need fresh rebuilds – This means a clean database – Otherwise duplicate items (drafts, versions) will be found on the subscribers – Fortunately the syndication process can be accelerated by copying the JCR domain – <plug>On 8.5 a rebuild after copying the DB is much faster than 8.0</plug>
24.
24 © 2014
IBM Corporation Managed Pages Considerations
25.
25 © 2014
IBM Corporation Managed Pages Considerations Pages live in the Release database domain as they always have All features but syndication continue to use the pages from the Release domain Syndication is possible because WCM stores a copy of each page in the JCR The copy is syndicated, and the subscriber restores the release copy This means that the portal site library can be deleted and rebuilt easily
26.
26 © 2014
IBM Corporation Managed Pages Considerations Migration should be performed with managed pages OFF But you can easily enable or disable it, so if you need to re-migrate a system with managed pages, you can disable it, migrate then re-enable Incidentally you could rebuild a portal site structure from a site library by syndicating it to another portal
27.
27 © 2014
IBM Corporation Managed Pages Considerations Now because syndication relies on the agreement of identity you must be very careful not to perform operations on downstream portals which could result in pages or applications with different unique ids This means ALL pages and applications should be deployed on downstream systems using the Staging to Production process described in the infocenter Failure to observe this caution will result in syndication errors Which is a fantastic segue to plug the new 8.5 syndication administrative UI http://www.youtube.com/watch?v=gW-21QOF35U Which includes a full featured diagnostic console, watch the video!
28.
28 © 2014
IBM Corporation Planning for changes to content during migration Cross version syndication introduces the possibility of staging the migration by migrating teams and projects separately
29.
29 © 2014
IBM Corporation Planning for changes to content during migration In this example, an initial migration has been performed, and then an ongoing cross version syndication relationship is maintained The new site shares design artifacts from the existing site, yet it can launch independently of the migration of the rest of the organization
30.
30 © 2014
IBM Corporation Planning for changes to content during migration In syndication upstream changes overwrite downstream modification ─ Unless the downstream system has a more recent modification ─ This is a temporary state, as soon as the upstream item is modified it will overwrite the down So, make changes upstream wherever conflict is possible Limit downstream work to isolated libraries where no upstream modifications take place
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IBM Corporation References Portal 8.5 Knowledge Center ─ http://www-01.ibm.com/support/knowledgecenter/SSHRKX_8.5.0/mp/migrate/migration.dita Portal 8.5 Migration Roadmaps ─ http://www-01.ibm.com/support/knowledgecenter/SSHRKX_8.5.0/mp/install/rm_migration.dita Portal 8.5 Managed Pages ─ http://www- 01.ibm.com/support/knowledgecenter/api/content/SSYJ99_8.5.0/wcm/wcm_config_mngpages.dita? locale=en&ro=kcUI Staging to Production ─ http://www-01.ibm.com/support/knowledgecenter/SSHRKX_8.5.0/mp/deploy/dep_intr.dita Cross Version Syndication ─ http://www-01.ibm.com/support/knowledgecenter/#!/SSYJ99_8.5.0/migrate/mig_content_options_cross- version.dita Recommended fixes ─ http://www-01.ibm.com/support/docview.wss?uid=swg27007603
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