Why we are using cluster tables mainly HR

can any plz tell me why we are using cluster tables mainly HR???

Nice question -
Am making my guess based on whatever little I know;
PCLn are file systems and not a traditional (RDBMS) table system. Each File may contain one or more data clusters. SAP Defines data clusters thus -
A data cluster is a grouping of several data objects. Elementary fields, field strings and internal tables can be grouped in a data cluster.
Example:Clusters B1 and B2 in files PCL1 and PCL2 are relevant to time evaluation, as is cluster PS, which stores the generated schema.
The reason why file system of data storage is used instead of DB Table system may be for the purpose of storing voluminous data (Payroll and time) and ease of retrieval during processing (RDBMS may hv tough time in this). Also probably because of SAP's origin from Mainframe.
Why data clusters are used -? Probably data clusters are an offshoot (or part) of File system
Pls feel free to contradict the above. Actually DB experts can throw more light on this..
Regards
Chandra

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Hi Harish,
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so
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---=
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and 'GENTPB 0", "GENTPB * ", "GENTPB 01R", "GENTPE B".
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Hi Salil,
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Why we are using cluster tables mainly HR

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