Consequences of a Client/Server Upgrade to SAS 9.3

Upgrade: Definition

An upgrade is the process of installing a later version of SAS software over an existing version of SAS software at the customer site (for example, from SAS 8.2 to SAS 9.3). A system manager at your site is responsible for performing the upgrade.

The result of an upgrade can affect the ability of SAS/SHARE clients and servers to connect and share data.

Data Migration

Accessing your data is a primary concern after upgrading to a new version of SAS. If the server (and clients) have been upgraded to SAS 9.3, and you want to make all new I/O engine features available, you can migrate the data to the release that the server runs. For complete details about migration, see http://support.sas.com/rnd/migration.

Access Restrictions Following an Upgrade to SAS 9.3

If you do not migrate your SAS data and applications to the new version of SAS, you will be accessing SAS files and using SAS applications in a cross-version environment. Therefore, it is important to be aware of any restrictions when operating in a cross-version environment. The following tables identify the combinations of SAS/SHARE clients and servers, the SAS version that they run, and their ability for access.

Results of a SAS/SHARE Server Upgrade

Version of SAS/SHARE	SAS/SHARE Client to Server Access Restrictions after an Upgrade from One SAS Release to Another SAS Release
	SAS 6 to SAS 8	SAS 6 to SAS 9	SAS 8 to SAS 9
SAS 6	Yes1	No2	No2
SAS 8	Yes1	Yes1	Yes1
SAS 9	Required3	Required3	Yes1
1Yes. After SAS has been upgraded, the client and server can connect and exchange data.
2No. After SAS has been upgraded, the client and server cannot connect.
3Required. If SAS is not upgraded, the SAS application cannot run.

Some example results of a SAS/SHARE server upgrade are:

If a SAS/SHARE server is upgraded from SAS 6 to SAS 9.3, a SAS/SHARE client that runs SAS 6 cannot access the SAS/SHARE server.
If a SAS/SHARE client that runs SAS 9.3 and uses applications that are written in SAS 9.3 wants to access a SAS/SHARE server that runs SAS 6, the SAS 6 SAS/SHARE server must be upgraded to SAS 9.3. If the SAS/SHARE server is not upgraded, the SAS/SHARE client's SAS 9.3 applications cannot run.

Some example results of a SAS/SHARE client upgrade are:

If a SAS/SHARE client is upgraded from SAS 8 to SAS 9.3, a SAS/SHARE server that runs SAS 9.3 can be accessed by the SAS/SHARE client.
If a SAS/SHARE client that runs SAS 6 wants to access a SAS/SHARE server that runs SAS 9.3 and uses applications that are written in SAS 9.3, the SAS 6 SAS/SHARE client must be upgraded to SAS 9.3. If the SAS/SHARE client is not upgraded, the SAS/SHARE server's SAS 9.3 applications cannot run on the client.