Computerized database system and method

A computerized distributed database, comprising:

• a first server and a second server, the first server storing a first version of a data record, the second server storing a second version of the data record, each of said first and second versions of the data record being associated with a respective unique identification key;
• each respective identification key specifying at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• the first server, in response to a record relocation command, modifying the first version of the data record to include a reference to the respective key of the second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

A method implemented in computerized distributed database system including a first and a second server, comprising:

• storing in the first server a first version of a data record, storing in the second server a second version of the data record, each of said first and second versions of the data record being associated with a respective unique identification key;
• specifying, by each respective identification key, at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• modifying by the first server, in response to a record relocation command, the first version of the data record to include a reference to the respective key of the second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

Computer-readable memory comprising computer-program instructions that when executed cause:

• a first server to store a first version of a data record, a second server to store a second version of the data record, each of said first and second versions of the data record being associated with a respective unique identification key;
• each respective identification key specifying at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• the first server, in response to a record relocation command, to modify the first version of the data record to include a reference to the respective key of the second version of the data record and to change a read/write status of the first record to a read only status, and the second version of the data record to include a reference to the respective key of the first version of the data record.

A computerized distributed database storing data records, comprising:

• a server storing a first version of a data record associated with a respective unique identification key;
• each respective identification key specifying at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• the server, in response to a record relocation command, modifying the first version of the data record to include a reference to the respective key of a second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

A method implemented in computerized distributed database system, comprising:

• storing in a server a first version of a data record associated with a respective unique identification key;
• specifying, by each respective identification key, at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• modifying by the server, in response to a record relocation command, the first version of the data record to include a reference to the respective key of a second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

Computer-readable memory comprising computer-program instructions that when executed cause:

• a server to store a first version of a data record in association with a respective unique identification key;
• each respective identification key specifying at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• the server, in response to a record relocation command, to modify the first version of the data record to include a reference to the respective key of a second version of the data record and to change a read/write status of the first record to a read only status, and the second version of the data record to include a reference to the respective key of the first version of the data record.

A computerized distributed database, comprising:

• means for storing a first version of a data record and for storing a second version of the data record;
• means for associating each of said first and second versions of the data record with a respective unique identification key;
• means for specifying, by each respective identification key, at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• means for, in response to a record relocation command, modifying the first version of the data record to include a reference to the respective key of the second version of the data record and for changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

A method for operating a server, comprising:

• storing in the server a first version of a data record associated with a respective unique identification key, the record stored as part of a database;
• specifying, by each respective identification key, at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• modifying by the server, in response to a record relocation command, the first version of the data record to include a reference to a second key of a second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

A server, comprising:

• means for storing in the server a first version of a data record associated with a respective unique identification key, the record stored as part of a database;
• means for specifying, by each respective identification key, at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• means for modifying by the server, in response to a record relocation command, the first version of the data record to include a reference to a second key of a second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.

A server, comprising:

• a first version of a data record associated with a respective unique identification key, the record stored in the server as part of a database;
• each respective identification key specifying at least one respective location where a respective record resides in the database, the respective location being specified by a logical location value that indicates a respective logical location where the respective record resides in the database and a server identification value that indicates a respective physical server assigned to the logical location in which the respective record is stored;
• and
• a processor to modify, in response to a record relocation command, the first version of the data record to include a reference to a second key of a second version of the data record and changing a read/write status of the first record to a read only status, the second version of the data record including a reference to the respective key of the first version of the data record.