Patent application number | Description | Published |
20100008414 | High-Speed Signaling Systems And Methods With Adaptable, Continuous-Time Equalization - A receiver includes a continuous-time equalizer, a decision-feedback equalizer (DFE), data and error sampling logic, and an adaptation engine. The receiver corrects for inter-symbol interference (ISI) associated with the most recent data symbol (first post cursor ISI) by establishing appropriate equalization settings for the continuous-time equalizer based upon a measure of the first-post-cursor ISI. | 01-14-2010 |
20100046600 | Methods and Circuits for Asymmetric Distribution of Channel Equalization Between Devices - A transceiver architecture supports high-speed communication over a signal lane that extends between a high-performance integrated circuit (IC) and one or more relatively low-performance ICs employing less sophisticated transmitters and receivers. The architecture compensates for performance asymmetry between ICs communicating over a bidirectional lane by instantiating relatively complex transmit and receive equalization circuitry on the higher-performance side of the lane. Both the transmit and receive equalization filter coefficients in the higher-performance IC may be adaptively updated based upon the signal response at the receiver of the higher-performance IC. | 02-25-2010 |
20100097071 | Integrated Circuit Having Receiver Jitter Tolerance ("JTOL") Measurement - An integrated circuit capable of on-chip jitter tolerance measurement includes a jitter generator circuit to produce a controlled amount of jitter that is injected into at least one clock signal, and a receive circuit to sample an input signal according to the at least one clock signal. The sampled data values output from the receiver are used to evaluate the integrated circuit's jitter tolerance. | 04-22-2010 |
20100135378 | Receiver with Clock Recovery Circuit and Adaptive Sample and Equalizer Timing - A receiver is equipped with an adaptive phase-offset controller and associated timing-calibration circuitry that together shift the timing for a data sampler and a digital equalizer. The sample and equalizer timing is shifted to a position with less residual inter-symbol interference (ISI) energy relative to the current symbol. The shifted position may be calculated using a measure of signal quality, such as a receiver bit-error rate or a comparison of filter-tap values, to optimize the timing of data recovery. | 06-03-2010 |
20130093433 | Integrated Circuit Having Receiver Jitter Tolerance ("JTOL") Measurement - An integrated circuit capable of on-chip jitter tolerance measurement includes a jitter generator circuit to produce a controlled amount of jitter that is injected into at least one clock signal, and a receive circuit to sample an input signal according to the at least one clock signal. The sampled data values output from the receiver are used to evaluate the integrated circuit's jitter tolerance. | 04-18-2013 |
Patent application number | Description | Published |
20080235291 | Readable physical storage replica and standby database system - A standby database system or another replica data system replicates changes, made to data blocks at a source database system or another primary data copy, to replicas of the data blocks at the standby database system or other replica. While replicating the changes to the data blocks thereof, the standby database system (or other replica) receives queries (or reads) issued thereto and computes the queries based on data read from the data blocks thereof. | 09-25-2008 |
20130086330 | Write-Back Storage Cache Based On Fast Persistent Memory - A storage device uses non-volatile memory devices for caching. The storage device operates in a mode referred to herein as write-back mode. In write-back mode, a storage device responds to a request to write data by persistently writing the data to a cache in a non-volatile memory device and acknowledges to the requestor that the data is written persistently in the storage device. The acknowledgement is sent without necessarily having written the data that was requested to be written to primary storage. Instead, the data is written to primary storage later. | 04-04-2013 |
20140095452 | IN PLACE POINT-IN-TIME RECOVERY OF PLUGGABLE DATABASES - In an approach, a database server maintains a container database which comprises: one or more pluggable databases, a root database that stores an undo log for rolling back transactions on the consolidated database, and a redo log for replaying modifications to the container database. The database server restores a particular pluggable with a backup version that corresponds to a first point in time. The database server generates a clone database loaded with a backup version of the root database that corresponds to the first point in time. The database server applies the redo log to recover the particular pluggable database and the clone database to a second point in time that is later than the first point in time. The database server identifies, based on the clone database, one or more active transactions on the particular pluggable database. The database server rolls back the one or more active transactions. | 04-03-2014 |
20140095802 | Caching Large Objects In A Computer System With Mixed Data Warehousing And Online Transaction Processing Workload - Techniques are provided for managing cached data objects in a mixed workload environment. In an embodiment, a database system receives request to access a target data object. The database system determines whether the request to access the target data object is associated with a first type of workload or a second type of workload. In response to determining that the request is associated with the first type of workload, the target data object replaces a least recently used data object in a cache. In response to determining that the request is associated with the second type of workload, the target data object is cached based on an associated access-level value. | 04-03-2014 |
Patent application number | Description | Published |
20120198351 | Automatically Testing a Web Application That Has Independent Display Trees - An automatic testing application is provided that can simulate a user interaction with a web application. The automatic testing application can determine that the web application has been completely displayed within a graphical user interface of a web browser using a consistent global page state. The automatic testing application can test that the web application has been correctly displayed by verifying a state of a visualization component of the web application using a communication component. Subsequently, the automatic testing application can transmit an event to the web application that can modify the state of the visualization component using the communication component. Once the automatic testing application has determined that the web application has been completely re-displayed, using the consistent global page state, the automatic testing application can test that the web application has been correctly re-displayed by verifying a modified state of the visualization component using the communication component. | 08-02-2012 |
20120198374 | DRAG AND DROP INTERACTION BETWEEN COMPONENTS OF A WEB APPLICATION - A user of a web application can perform a drag and drop operation from a first component of the web application to a second component of the web application. The drag and drop operation can include three actions. The first action can be initializing a drag of an object within a first component of a web application. The second action can be dragging the object from within the first component over a drop target located within a second component of the web application. The third action can be dropping the object onto the drop target located within the second component of the web application. One of the first and second components can be a web component, and the other component can be a visualization component. The first and second components of the web application can communicate with each other using a communication component of the web application. | 08-02-2012 |
20120293516 | KEYBOARD NAVIGATION AMONG VISUAL ELEMENTS IN A USER INTERFACE - A system navigates among visual elements of a user interface. The system receives a keystroke indicating navigating from a current visual element in a first direction, determines a next visual element that is substantially near the current visual element and in the first direction, and navigates to the next visual element. | 11-22-2012 |
20140095517 | PREDICATE RESULT CACHE - In token compression, a column value is represented by a encoded token. During early predicate evaluation, the result that a decoded token in a column does not satisfy a predicate condition in a predicate conjunction is recorded in a cache as a “FALSE”. Such a result not only means that when the column contains that token that the predicate condition is not satisfied, but also that a predicate conjunction containing the predicate condition is not satisfied. When performing early predicate evaluation on a subsequent row on a token in a column, the conjunction result cache is referred to. If the cache records a FALSE for that token in that column, then it is known the predicate conjunction cannot be satisfied by the decoded token. | 04-03-2014 |
20140279960 | Row Level Locking For Columnar Data - Row locking is performed at the row level of granularity for database data stored in columnar form. Row level locking entails use of a lock vector that is stored in a compression unit in a data block, the compression unit storing rows in columnar-major format. On an as needed basis, the lock vector is expanded to identify more transactions affecting the rows in the compression unit. | 09-18-2014 |
20140280249 | PREDICATE OFFLOAD OF LARGE OBJECTS - In an approach, the database server generates a request for data representing rows of a table, the request identifying one or more data blocks stored on a storage system. The database server then generates metadata describing one or more filtering conditions to be applied to the rows and sends the metadata along with the request to the storage system. The storage system, when applying filtering conditions to a column containing a LOB, determines whether the LOB is stored in-line or out-of-line. If the column contains an out-of-line LOB, the storage system skips the filtering conditions on the column. If the column contains an in-line LOB, the storage system applies the filtering conditions to the column. Upon obtaining the filtered data from the storage system, the database server retrieves the data blocks for out-of-line LOBs and applies the skipped filtering conditions to create a final result set. | 09-18-2014 |
20150088830 | MIRRORING, IN MEMORY, DATA FROM DISK TO IMPROVE QUERY PERFORMANCE - Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data. | 03-26-2015 |
20160034214 | MIRRORING, IN MEMORY, DATA FROM DISK TO IMPROVE QUERY PERFORMANCE - Techniques are provided for maintaining data persistently in one format, but making that data available to a database server in more than one format. For example, one of the formats in which the data is made available for query processing is based on the on-disk format, while another of the formats in which the data is made available for query processing is independent of the on-disk format. Data that is in the format that is independent of the disk format may be maintained exclusively in volatile memory to reduce the overhead associated with keeping the data in sync with the on-disk format copies of the data. | 02-04-2016 |
20160070726 | AUTOMATIC VERIFICATION AND TRIAGE OF QUERY RESULTS - Techniques are provided for automatic verification of query results obtained from data formatted different from row-major format. Techniques are also provided for automatic triage of query results obtained from data formatted different from row-major format. In an embodiment, the query results may be obtained from querying data formatted in column-major format. In an embodiment, when the query results are determined to be incorrect, a cause of the error in the query results can be automatically identified. | 03-10-2016 |