Installation guide
For a more detailed list of the differences between WEB1000 and IMPAX, refer to “WEB1000 and
IMPAX 6.5.3 feature comparison” (topic number 55002) in the IMPAX Migrations Reference Guide.
WEB1000 transition strategy
(Topic number: 6610)
In most cases, the process of moving WEB1000 users to IMPAX 6.5.3 is a gradual one, taking place
over months. The WEB1000 Server itself is never upgraded to an IMPAX 6.5.3 Server. Instead, both
systems coexist for a time, until it is feasible to move all WEB1000 users to IMPAX 6.5.3.
This strategy is based on the following assumptions:
• Access to recent studies in the WEB1000 web cache occurs frequently, while access to older
studies is infrequent.
• When older studies are needed, they can be retrieved from the archive. This results in some
delay, which users have found acceptable.
• Metadata from WEB1000 is transient.
• Amount of WEB1000 web cache space is limited; therefore, the age of the studies stored in that
cache is limited.
If some of these assumptions are not true for a particular site, adapt the strategy as needed to meet
the needs of that site.
Phase 1: Pre-Migration period
(Topic number: 6644)
WEB1000 and IMPAX 5.2 or 5.3 (if also used at the site) function normally. Each operates as a
separate system with its own set of data. Based on routing rules, IMPAX routes images to WEB1000.
Data Currency keeps the study information synchronized between IMPAX and WEB1000 by
propagating WEB1000 changes to IMPAX.
During this period, WEB1000 user IDs, privilege levels, access control groups and features, and team
information are exported for analysis and planning. WEB1000 user IDs and privilege levels are
migrated into an ADAM database for future use in IMPAX 6.5.3.
Phase 2: IMPAX 6.5.3 upgrade
(Topic number: 6643)
If IMPAX 5.2 or 5.3 is also used at the site, at some point its servers and clients are upgraded to
IMPAX 6.5.3. No changes are made to the WEB1000 Clients and Server.
For WEB1000-only sites, IMPAX 6.5.3 Clients and Servers are installed. No changes are made to the
WEB1000 Clients and Server. The Data Currency service is stopped, as it is not compatible with
IMPAX 6.5.3.
AS300 Preparing to Upgrade Guide—IMPAX 4.5, 5.2, 5.3,or WEB1000 to IMPAX 6.5.3 18
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