Informatica
informatica: What r the kinds of lookup?
You can configure the Lookup transformation to perform different types of lookups. You can configure the transformation to be connected or unconnected, cached or uncached: Connected or unconnected. Connected and unconnected transformations receive input and send output in different ways. Cached or uncached. Sometimes you can improve session performance by caching the lookup table. If you cache the lookup table, you can choose to use a dynamic or static cache. By default, the lookup cache remains static and does not change during the session. With a dynamic cache, the Informatica Server inserts or updates rows in the cache during the session. When you cache the target table as the lookup, you can look up values in the target and insert them if they do not exist, or update them if they do
informatica: Persistent cache and non persistent.
PERSISTANT CACHEIf you want to save and reuse the cache files, you can configure the transformation to use a persistent cache. Use a persistent cache when you know the lookup table does not change between session runs. The first time the Informatica Server runs a session using a persistent lookup cache, it saves the cache files to disk instead of deleting them. The next time the Informatica Server runs the session, it builds the memory cache from the cache files. If the lookup table changes occasionally, you can override session properties to recache the lookup from the database. NONPERSISTANT CACHEBy default, the Informatica Server uses a non-persistent cache when you enable caching in a Lookup transformation. The Informatica Server deletes the cache files at the end of a session. The next time you run the session, the Informatica Server builds the memory cache from the database
informatica: Dynamic cache?
You might want to configure the transformation to use a dynamic cache when the target table is also the lookup table. When you use a dynamic cache, the Informatica Server updates
You can configure the Lookup transformation to perform different types of lookups. You can configure the transformation to be connected or unconnected, cached or uncached: Connected or unconnected. Connected and unconnected transformations receive input and send output in different ways. Cached or uncached. Sometimes you can improve session performance by caching the lookup table. If you cache the lookup table, you can choose to use a dynamic or static cache. By default, the lookup cache remains static and does not change during the session. With a dynamic cache, the Informatica Server inserts or updates rows in the cache during the session. When you cache the target table as the lookup, you can look up values in the target and insert them if they do not exist, or update them if they do
informatica: Persistent cache and non persistent.
PERSISTANT CACHEIf you want to save and reuse the cache files, you can configure the transformation to use a persistent cache. Use a persistent cache when you know the lookup table does not change between session runs. The first time the Informatica Server runs a session using a persistent lookup cache, it saves the cache files to disk instead of deleting them. The next time the Informatica Server runs the session, it builds the memory cache from the cache files. If the lookup table changes occasionally, you can override session properties to recache the lookup from the database. NONPERSISTANT CACHEBy default, the Informatica Server uses a non-persistent cache when you enable caching in a Lookup transformation. The Informatica Server deletes the cache files at the end of a session. The next time you run the session, the Informatica Server builds the memory cache from the database
informatica: Dynamic cache?
You might want to configure the transformation to use a dynamic cache when the target table is also the lookup table. When you use a dynamic cache, the Informatica Server updates