DataSets Vs Hash Files

srekant · Post by **srekant** » Wed Nov 30, 2005 10:56 pm

Hi,

Is DataSets in DS7.5 EE equivalent to server HashFiles .If not any other stage in DS 7.5 EE that have the functionality of Hashfiles.

kcbland · Post by **kcbland** » Wed Nov 30, 2005 11:04 pm

No. They are like apples and oranges. They're in the fruit family (both hold data) but are not even close in usage capabilities.

ray.wurlod · Post by **ray.wurlod** » Thu Dec 01, 2005 1:35 am

You are probably noting a similarity between the fact that a hashed file and a data set can be in memory and can service lookups.

While that is true, the architecture of each is radically different. For example there is no mechanism for automatically partitioning a hashed file over the processing nodes defined in the configuration file. There is no published information as to whether data sets use hashing or some other mechanism for finding key values, and apparently this may be different depending on the source from which the virtual data set was loaded.

Conceptually, then, there are some similarities, but they are definitely not the same animal.