Answer Posted / rackshit sharma (+91-991107896
LDS(LINEAR DATASET)
1.No CI(control interval) is there in Lds thus there is no
RDF's & CIDF.
2.Data is stored as data bytes, only data component exists.
3.Data accessed as byte addressable string.
4.Has a CISZ of (4096)bytes.
5.Mainly used where fast & random access is required to
data having no hierarchical restrictions like table/array
ESDS(Entry sequenced dataset).
1.CI is there withone or more RDF's per logical record & 1
CIDF per CI.
2.Records are sequenced on the basis of their entry, more
like in FIFO manner.Records are inserted from the bottom
of the last record in dataset.
3.No freespace as it is unused space because records cant
deleted in esds only made inactive so we cannot use dat
space again,only rewtite is possible.
4.Each record has its unique RBA(relative byte address),
useful while processind ESDS.
5.Can be used in system where sequence has to be maintain
like,Online Examination,Railway reservation sysytems.
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