Patents Assigned to ALTIBASE CORP.
  • METHOD AND APPARATUS FOR MANAGING BUFFER CACHE TO PERFORM PAGE REPLACEMENT BY USING REFERENCE TIME INFORMATION REGARDING TIME AT WHICH PAGE IS REFERRED TO
    Publication number: 20130262742
    Abstract: A method and apparatus manages a buffer cache. An extended buffer is used to perform a page replacement algorithm using reference time information regarding a time at which a page is referred. Pages replaced through the page replacement algorithm, when re-referred to, may be retrieved from the extended buffer, instead of a hard disk. As a result, write/read operations with respect to the disk are made efficient and the page input/output speed is increased.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 3, 2013
    Applicant: ALTIBASE CORP.
    Inventors: Jang Woo Park, Sang-Won Lee
  • PARALLEL PROCESSING APPARATUS AND METHOD IN DATABASE MANAGEMENT SYSTEM FOR SYNCHRONOUS REPLICATION
    Publication number: 20130198133
    Abstract: A parallel-processing apparatus and method provide for synchronous replication in a database management system (DBMS). During synchronous replication into the active node and the standby node in the DBMS, replications of transactions are parallelized in units of transactions, thereby improving a performance of the DBMS, guaranteeing atomicity and consistency of the transaction, and solving the deadlock state which may occur in parallel-processing.
    Type: Application
    Filed: May 30, 2012
    Publication date: August 1, 2013
    Applicant: ALTIBASE CORP.
    Inventors: Seung Won Lee, Jun Ho Choi
  • APPARATUS AND METHOD OF MANAGING DATABASES OF ACTIVE NODE AND STANDBY NODE OF MAIN MEMORY DATABASE MANAGEMENT SYSTEM
    Publication number: 20130151895
    Abstract: Databases of an active node and a standby node of a main memory database management system (MMDBMS) are managed so as to prevent loss of a transaction caused by failure of any one of the active node or the standby node. The MMDBMS is configured to prevent data mismatch between the active node and the standby node when failure of any one of the active node and the standby node occurs. In case of failure of one of the nodes, log information from the other node is obtained to recover the failed node.
    Type: Application
    Filed: April 26, 2012
    Publication date: June 13, 2013
    Applicant: ALTIBASE CORP.
    Inventor: Seung Won Lee
  • DATABASE MANAGEMENT SYSTEM AND ENCRYPTION METHOD PERFORMED IN DATABASE
    Publication number: 20130091357
    Abstract: A database management system (DBMS) performs encryption in a DB. The system receives authentication authorization regarding a security policy of the DB from an external encryption unit that is separated from the DB and performs encryption. Important data in a column unit is selectively encrypted and an encrypted comparison code (ECC) of the important data is generated inside the DB. The encrypted important data and the corresponding ECC is generated as a single encryption data type.
    Type: Application
    Filed: June 18, 2012
    Publication date: April 11, 2013
    Applicant: ALTIBASE CORP.
    Inventor: Chan Seung Moon