Smirnios
John Smirnios, Kitchener CA
Patent application number | Description | Published |
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20150100557 | Index Building Concurrent with Table Modifications and Supporting Long Values - Disclosed herein are system, method, and computer program product embodiments for constructing an index for a database table. An index that comprises a data structure may be created. The index can then be populated with data from the database table. When a request to modify the database table is received, the method may determine that the request to modify the database table relates to a portion of the database table corresponding to a portion of the index that has yet to be populated. An entry indicating the requested modification can be inserted into the portion of the index that has yet to be populated. | 04-09-2015 |
John Smirnios, Ontario CA
Patent application number | Description | Published |
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20160085639 | CONVERTING A SERIAL TRANSACTION SCHEDULE TO A PARALLEL TRANSACTION SCHEDULE - A method and system for transforming a serial schedule of transactions into a parallel schedule of transaction is disclosed. In one example, a computer system stores a list of data transactions in a transaction log. The computer system then reads a respective data transaction from the transaction log. The computer system determines whether the respective data transaction is dependent on any other currently pending data transaction. In accordance with a determination that the respective data transaction is not dependent on any other currently pending data transaction, the computer system applies the data changes to a reconstructed data set. In accordance with a determination that the respective data transaction is dependent on a currently pending second data transaction, the computer system delays commitment of the respective data transaction until the second data transaction has been applied to the reconstructed data set. | 03-24-2016 |
John C. Smirnios, Waterloo CA
Patent application number | Description | Published |
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20140019688 | Solid State Drives as a Persistent Cache for Database Systems - Disclosed herein are systems, methods, and computer readable storage media for a database system using solid state drives as a second level cache. A database system includes random access memory configured to operate as a first level cache, solid state disk drives configured to operate as a persistent second level cache, and hard disk drives configured to operate as disk storage. The database system also includes a cache manager configured to receive a request for a data page and determine whether the data page is in cache or disk storage. If the data page is on disk, or in the second level cache, it is copied to the first level cache. If copying the data page results in an eviction, the evicted data page is copied to the second level cache. At checkpoint, dirty pages stored in the second level cache are flushed in place in the second level cache. | 01-16-2014 |