Patents by Inventor Petio G. Petev
Petio G. Petev has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9009409Abstract: A method to store objects in a memory cache is disclosed. A request is received from an application to store an object in a memory cache associated with the application. The object is stored in a cache region of the memory cache based on an identification that the object has no potential for storage in a shared memory cache and a determination that the cache region is associated with a storage policy that specifies that objects to be stored in the cache region are to be stored in a local memory cache and that a garbage collector is not to remove objects stored in the cache region from the local memory cache.Type: GrantFiled: July 12, 2011Date of Patent: April 14, 2015Assignee: SAP SEInventors: Galin Galchev, Frank Kilian, Oliver Luik, Dirk Marwinski, Petio G. Petev
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Publication number: 20140156938Abstract: A method to store objects in a memory cache is disclosed. A request is received from an application to store an object in a memory cache associated with the application. The object is stored in a cache region of the memory cache based on an identification that the object has no potential for storage in a shared memory cache and a determination that the cache region is associated with a storage policy that specifies that objects to be stored in the cache region are to be stored in a local memory cache and that a garbage collector is not to remove objects stored in the cache region from the local memory cache.Type: ApplicationFiled: July 12, 2011Publication date: June 5, 2014Inventors: Galin Galchev, Frank Kilian, Oliver Luik, Dirk Marwinski, Petio G. Petev
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Patent number: 8612960Abstract: Embodiments include a system for loading components with complex intra-dependencies. Components in the system may be assigned at start up to a common loader module. The system detects reference cycles amongst the set of components in the system. All components in a reference cycle may be assigned for loading to the same common loader. This system avoids deadlock scenarios by identifying reference cycles at start up and assigning each cycle to a single common loader. The embodiments of the system also analyze components to be loaded that are identified after start up to determine if they cause a new reference cycle. Components that cause a new reference cycle may not be allowed to be loaded to prevent deadlock loading scenarios.Type: GrantFiled: May 6, 2009Date of Patent: December 17, 2013Assignee: SAP AGInventors: Petio G. Petev, Nikolai S. Dimitrov
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Patent number: 7996615Abstract: A method to associate a storage policy with a cache region is disclosed. In this method, a cache region associated with an application is created. The application runs on virtual machines, and where a first virtual machine has a local memory cache that is private to the first virtual machine. The first virtual machine additionally has a shared memory cache that is shared by the first virtual machine and a second virtual machine. Additionally, the cache region is associated with a storage policy. Here, the storage policy specifies that a first copy of an object to be stored in the cache region is to be stored in the local memory cache and that a second copy of the object to be stored in the cache region is to be stored in the shared memory cache.Type: GrantFiled: July 7, 2010Date of Patent: August 9, 2011Assignee: SAP AGInventors: Galin Galchev, Frank Kilian, Oliver Luik, Dirk Marwinski, Petio G. Petev
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Patent number: 7971001Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in. The eviction policy plug-in includes an eviction timing component and a sorting component, with the eviction timing component including code to implement an eviction timing method, and the eviction timing method to trigger eviction of an object from the region of cache. The sorting component includes code to implement a sorting method to identify an object that is eligible for eviction from said region of cache. The sorting method includes identifying an object for eviction that is cached in the region of cache and that has been used least recently compared to other objects that are cached in the region of cache.Type: GrantFiled: December 28, 2004Date of Patent: June 28, 2011Assignee: SAP AGInventors: Petio G. Petev, Michael Wintergerst
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Patent number: 7840760Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in. The eviction policy plug-in includes an eviction timing component and a sorting component, with the eviction timing component including code to implement an eviction timing method, and the eviction timing method to trigger eviction of an object from the region of cache. The sorting component includes code to implement a sorting method to identify an object that is eligible for eviction in the region of cache. The sorting method involves identifying an object that has been cached in the region of cache for a longer time period than other objects that are cached in the cache region.Type: GrantFiled: May 26, 2009Date of Patent: November 23, 2010Assignee: SAP AGInventors: Petio G. Petev, Michael Wintergerst
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Patent number: 7831634Abstract: In one embodiment, a centralized cache configuration for the regions of cache of a system is described. As regions of cache may require different resources they therefore may need to be configured differently. The system for providing central cache configuration includes a centralized cache manager to transform information regarding applications, services, etc. into proper cache regions for each application, service, etc. In one embodiment, the size of these regions is based on a relative weight schema.Type: GrantFiled: April 29, 2005Date of Patent: November 9, 2010Assignee: SAP AGInventors: Petio G. Petev, Frank Kilian, Krasimir Semerdzhiev
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Publication number: 20100268881Abstract: A method to associate a storage policy with a cache region is disclosed. In this method, a cache region associated with an application is created. The application runs on virtual machines, and where a first virtual machine has a local memory cache that is private to the first virtual machine. The first virtual machine additionally has a shared memory cache that is shared by the first virtual machine and a second virtual machine. Additionally, the cache region is associated with a storage policy. Here, the storage policy specifies that a first copy of an object to be stored in the cache region is to be stored in the local memory cache and that a second copy of the object to be stored in the cache region is to be stored in the shared memory cache.Type: ApplicationFiled: July 7, 2010Publication date: October 21, 2010Inventors: Galin Galchev, Frank Kilian, Oliver Luik, Dirk Marwinski, Petio G. Petev
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Patent number: 7694065Abstract: Methods for a treatment of cached objects are described. In one embodiment, an object, associated with an object key, is stored in a first local memory cache associated with a first virtual machine within a first computing system. The object is also stored in a serialized format to a database. The object key is serialized after receiving a notification of successful storage of the object in the database. The serialized key is then sent over a network to a second computing system.Type: GrantFiled: December 28, 2004Date of Patent: April 6, 2010Assignee: SAP AGInventors: Petio G. Petev, Galin Galchev, Frank Kilian, Oliver Luik, Dirk Marwinski
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Patent number: 7653828Abstract: Embodiments include a timeout event management system that registers timeout events and checks for and corrects inaccuracies in timing caused by hibernation or system time changes. The timeout event management system may trigger an event after an intended delay time or at an intended expiration time. A handler program may be called in response to the triggered timeout. In an additional embodiment, the timeout system may track timeout events in a priority queue data structure.Type: GrantFiled: May 28, 2004Date of Patent: January 26, 2010Assignee: SAP AGInventors: Dimitar P. Kostadinov, Petio G. Petev, Hristo S. Iliev, Krasimir P. Semerdzhiev, Georgi N. Stanev, Jasen O. Minov
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Publication number: 20090282395Abstract: Embodiments include a system for loading components with complex intra-dependencies. Components in the system may be assigned at start up to a common loader module. The system detects reference cycles amongst the set of components in the system. All components in a reference cycle may be assigned for loading to the same common loader. This system avoids deadlock scenarios by identifying reference cycles at start up and assigning each cycle to a single common loader. The embodiments of the system also analyze components to be loaded that are identified after start up to determine if they cause a new reference cycle. Components that cause a new reference cycle may not be allowed to be loaded to prevent deadlock loading scenarios.Type: ApplicationFiled: May 6, 2009Publication date: November 12, 2009Applicant: SAP AGInventors: Petio G. Petev, Nikolai S. Dimitrov
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Publication number: 20090282196Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in. The eviction policy plug-in includes an eviction timing component and a sorting component, with the eviction timing component including code to implement an eviction timing method, and the eviction timing method to trigger eviction of an object from the region of cache. The sorting component includes code to implement a sorting method to identify an object that is eligible for eviction in the region of cache. The sorting method involves identifying an object that has been cached in the region of cache for a longer time period than other objects that are cached in the cache region.Type: ApplicationFiled: May 26, 2009Publication date: November 12, 2009Inventors: Petio G. Petev, Michael Wintergerst
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Patent number: 7581066Abstract: One embodiment of the invention employs techniques for providing isolation for exclusivity of operation. Isolation may exist between different application and/or different threads or virtual machines of the same application. In one embodiment, using a lock helps to ensure that operations are executed exclusive of each other.Type: GrantFiled: April 29, 2005Date of Patent: August 25, 2009Assignee: SAP AGInventors: Dirk Marwinski, Petio G. Petev
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Patent number: 7552284Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in. The eviction policy plug-in includes an eviction timing component and a sorting component, with the eviction timing component including code to implement an eviction timing method, and the eviction timing method to trigger eviction of an object from the region of cache. The sorting component includes code to implement a sorting method to identify an object that is eligible for eviction from said region of cache. The sorting method includes identifying an object for eviction that is cached in the region of cache and that has been used less frequently than other objects that are cached in the region of cache.Type: GrantFiled: December 28, 2004Date of Patent: June 23, 2009Assignee: SAP AGInventors: Petio G. Petev, Michael Wintergerst
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Patent number: 7546593Abstract: Embodiments include a system for loading components with complex intra-dependencies. Components in the system may be assigned at start up to a common loader module. The system detects reference cycles amongst the set of components in the system. All components in a reference cycle may be assigned for loading to the same common loader. This system avoids deadlock scenarios by identifying reference cycles at start up and assigning each cycle to a single common loader. The embodiments of the system also analyze components to be loaded that are identified after start up to determine if they cause a new reference cycle. Components that cause a new reference cycle may not be allowed to be loaded to prevent deadlock loading scenarios.Type: GrantFiled: May 28, 2004Date of Patent: June 9, 2009Assignee: SAP AGInventors: Petio G. Petev, Nikolai S. Dimitrov
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Patent number: 7539821Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in. The eviction policy plug-in includes an eviction timing component and a sorting component, with the eviction timing component including code to implement an eviction timing method, and the eviction timing method to trigger eviction of an object from the region of cache. The sorting component includes code to implement a sorting method to identify an object that is eligible for eviction in the region of cache. The sorting method involves identifying an object that has been cached in the region of cache for a longer time period than other objects that are cached in the cache region.Type: GrantFiled: December 28, 2004Date of Patent: May 26, 2009Assignee: SAP AGInventors: Petio G. Petev, Michael Wintergerst
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Patent number: 7512737Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in. The eviction policy plug-in includes an eviction timing component and a sorting component, with the eviction timing component including code to implement an eviction timing method, and the eviction timing method to trigger eviction of an object from the region of cache. The sorting component includes code to implement a sorting method to identify an object that is eligible for eviction from said region of cache. The sorting method includes identifying an object for eviction that is cached in the region of cache and that is larger than other objects that are cached in the region of cache.Type: GrantFiled: December 28, 2004Date of Patent: March 31, 2009Assignee: SAP AGInventors: Petio G. Petev, Michael Wintergerst
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Patent number: 7493449Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in and a storage plug-in. The eviction policy plug-in includes code to evict an object that is cached in the region of cache. The storage plug-in includes code to execute a function involving a key attribute manipulation function that, using a first hashing function and a key, identifies a table of attributes for the first object located within the region of cache, and using a second hashing function and an attribute name, gets a specific attribute for the first object from the table, the key being registered with the storage plug-in.Type: GrantFiled: December 28, 2004Date of Patent: February 17, 2009Assignee: Sap AGInventors: Dirk Marwinski, Petio G. Petev
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Patent number: 7469319Abstract: Methods and apparatuses enable separate management of shared data structures and shared data objects referenced by the shared data structures. The shared data structures are stored in a first memory, and the shared data structures are separately managed from the referenced shared data objects. The shared data objects can be accessed by the shared data structures via direct and/or indirect reference. A separation agent can detect references to data objects in an application to indicate which data objects are shared and are to be stored in the separate cache.Type: GrantFiled: July 28, 2006Date of Patent: December 23, 2008Assignee: SAP AGInventors: Dirk S. Marwinski, Petio G. Petev, Ingo Zenz
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Patent number: 7457918Abstract: Methods for a treatment of cached objects are described. In one embodiment, management of a region of a cache is configured with an eviction policy plug-in and a storage plug-in. The eviction policy plug-in includes code to evict an object that is cached in the region of cache. The storage plug-in includes code to execute a function involving a group manipulation function that gets each object within a pre-defined group of objects located within the region of cache, each object associated with a key, each key registered with the storage plug-in.Type: GrantFiled: December 28, 2004Date of Patent: November 25, 2008Assignee: SAP AGInventors: Dirk Marwinski, Petio G. Petev