A multi-list is really only a slightly modified inverted file. There is one list per keyword, i.e. hi = 1. The records containing a particular keyword Ki are chained together to form the Ki-list and the start of the Ki-list is given in the directory, as illustrated in Figure 4.6. Since there is no K3-list, the field reserved for its pointer could well have been omitted. So could any blank pointer field, so long as no ambiguity arises as to which pointer belongs to which keyword. One way of ensuring this, particularly if the data values (attribute-values) are fixed format, is to have the pointer not pointing to the beginning of the record but pointing to the location of the next pointer in the chain.
The multi-list is designed to overcome the difficulties of updating an inverted file. The addresses in the directory of an inverted file are normally kept in record-number order. But, when the time comes to add a new record to the file, this sequence must be maintained, and inserting the new address can be expensive. No such problem arises with the multi-list, we update the appropriate K-lists by simply chaining in the new record. The penalty we pay for this is of course the increase in search time. This is in fact typical of many of the file structures. Inherent in their design is a trade-off between search time and update time.
to have a data file with multiple access path is known as multi key file organization
file organization
Heap file organization Sequential File Organization Hashing File organization
Some popular file organization programs include Altap Salamander, GNOME Commander, Krusader, and GNOME's Nautilus. For a full list of available software you can visit the file manager webpage under the Wikipedia domain.
To determine if an organization is a Single Business Organization or a Multi-Business Organization, consider its operational scope. A Single Business Organization focuses on a single product or service line, while a Multi-Business Organization operates across multiple sectors or offers diverse products and services. If the organization has various divisions or subsidiaries engaging in different industries, it is classified as Multi-Business; otherwise, it is a Single Business Organization.
Serial file organization stores records in a linear format, while sequential file organization stores records in a specific order defined by a key field. In serial file organization, records don't have to be retrieved in a specific order, whereas in sequential file organization, records are retrieved based on the key field's order.
There is great importance in file organization. This type of organization can be easily looked through and files are easy to retrieve.
file organization is of 3 types sequential,direct and indexed sequential where how data is accessed in eash file is decided where as file maintainence is
random file organization is a organization were you search a certain object ofr file by the use of any key and in search by randomly
In a Multi-list organisation an index entry points to the first data record in the list, whereas in inverted index file an index entry has address pointers to all the data records related to it. • A multi-list index has fixed length records, whereas an inverted index contains variable length records
1. Just list the records in as many blocks as necessary to hold the records. 2. Blocks are linked by pointer or table of block address. This is called Heap file Organization. please let me know if you find any better answer thanks Afiz's (afizshaik@gmail.com)
bigger than an amoeba makes it multi-cellular