Computer data system data source refreshing using an update propagation graph

• US 9,805,084 B2
• Filed: 05/14/2016
• Issued: 10/31/2017
• Est. Priority Date: 05/14/2015
• Status: Active Grant

• Current Assignee: Deephaven Data Labs, LLC
• Original Assignee: Walleye Software LLC
• Inventors: Wright, Charles, Caudy, Ryan, Kent, IV, David R., Bronnimann, Herve, Teodorescu, Radu
• Primary Examiner(s): Chbouki, Tarek
• Application Number:
  US15/154,975
• Publication Number:
  US 20160335305A1
• Time in Patent Office: 535 Days
• CPC Class Codes: G06F 11/1451 by selection of backup contents
• CPC Class Codes: G06F 11/1464 for networked environments
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• CPC Class Codes: G06F 16/144 Query formulation
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• CPC Class Codes: G06F 16/215 Improving data quality; Data cleansing, e.g. de-duplication, removing invalid entries or correcting typographical errors
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• CPC Class Codes: G06F 16/2272 Management thereof
• CPC Class Codes: G06F 16/2282 Tablespace storage structures; Management thereof
• CPC Class Codes: G06F 16/2291 : User-Defined Types; Storage management thereof
• CPC Class Codes: G06F 16/23 : Updating
• CPC Class Codes: G06F 16/2308 : Concurrency control transaction processing G06F9/466
• CPC Class Codes: G06F 16/2358 : Change logging, detection, and notification replication G06F16/27
• CPC Class Codes: G06F 16/2365 : Ensuring data consistency and integrity
• CPC Class Codes: G06F 16/2372 : Updates performed during offline database operations
• CPC Class Codes: G06F 16/2379 : Updates performed during online database operations; commit processing
• CPC Class Codes: G06F 16/242 : Query formulation
• CPC Class Codes: G06F 16/2428 : Query predicate definition using graphical user interfaces, including menus and forms G06F16/2423 takes precedence
• CPC Class Codes: G06F 16/245 : Query processing
• CPC Class Codes: G06F 16/2453 : Query optimisation
• CPC Class Codes: G06F 16/24534 : Query rewriting; Transformation
• CPC Class Codes: G06F 16/24535 : of sub-queries or views
• CPC Class Codes: G06F 16/24537 : of operators
• CPC Class Codes: G06F 16/24539 : using cached or materialised query results
• CPC Class Codes: G06F 16/2455 : Query execution
• CPC Class Codes: G06F 16/24553 : of query operations
• CPC Class Codes: G06F 16/2456 : Join operations
• CPC Class Codes: G06F 16/24561 : Intermediate data storage techniques for performance improvement
• CPC Class Codes: G06F 16/2457 : with adaptation to user needs
• CPC Class Codes: G06F 16/24575 : using context
• CPC Class Codes: G06F 16/248 : Presentation of query results
• CPC Class Codes: G06F 16/254 : Extract, transform and load [ETL] procedures, e.g. ETL data flows in data warehouses
• CPC Class Codes: G06F 16/27 : Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
• CPC Class Codes: G06F 16/278 : Data partitioning, e.g. horizontal or vertical partitioning
• CPC Class Codes: G06F 16/285 : Clustering or classification
• CPC Class Codes: G06F 16/9024 : Graphs; Linked lists G06F16/9027 takes precedence
• CPC Class Codes: G06F 16/907 : Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
• CPC Class Codes: G06F 16/951 : Indexing; Web crawling techniques
• CPC Class Codes: G06F 16/9535 : Search customisation based on user profiles and personalisation
• CPC Class Codes: G06F 16/9538 : Presentation of query results
• CPC Class Codes: G06F 16/9566 : URL specific, e.g. using aliases, detecting broken or misspelled links
• CPC Class Codes: G06F 16/9574 : of access to content, e.g. by caching
• CPC Class Codes: G06F 17/40 : Data acquisition and logging for input to computer G06F3/00
• CPC Class Codes: G06F 21/00 : Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
• CPC Class Codes: G06F 21/6209 : to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
• CPC Class Codes: G06F 2201/805 : Real-time
• CPC Class Codes: G06F 2201/84 : Using snapshots, i.e. a logical point-in-time copy of the data
• CPC Class Codes: G06F 2212/1052 : Security improvement
• CPC Class Codes: G06F 2212/154 : Networked environment
• CPC Class Codes: G06F 2212/163 : Server or database system
• CPC Class Codes: G06F 2212/60 : Details of cache memory
• CPC Class Codes: G06F 3/0481 : based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
• CPC Class Codes: G06F 3/0482 : Interaction with lists of selectable items, e.g. menus
• CPC Class Codes: G06F 3/0483 : Interaction with page-structured environments, e.g. book metaphor
• CPC Class Codes: G06F 3/04847 : Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
• CPC Class Codes: G06F 3/0485 : Scrolling or panning
• CPC Class Codes: G06F 3/04895 : Guidance during keyboard input operation, e.g. prompting
• CPC Class Codes: G06F 3/0605 : by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0656 : Data buffering arrangements
• CPC Class Codes: G06F 3/067 : Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 40/117 : Tagging; Marking up details of markup languages G06F40/143; Designating a block; Setting of attributes style sheets, e.g. eXtensible Stylesheet Language Transformation [XSLT], G06F40/154
• CPC Class Codes: G06F 40/134 : Hyperlinking
• CPC Class Codes: G06F 40/166 : Editing, e.g. inserting or deleting
• CPC Class Codes: G06F 40/174 : Form filling; Merging
• CPC Class Codes: G06F 40/177 : of tables; using ruled lines
• CPC Class Codes: G06F 40/18 : of spreadsheets form-filling G06F40/174
• CPC Class Codes: G06F 40/183 : Tabulation, i.e. one-dimensional positioning
• CPC Class Codes: G06F 40/216 : using statistical methods
• CPC Class Codes: G06F 40/274 : Converting codes to words; Guess-ahead of partial word inputs
• CPC Class Codes: G06F 8/30 : Creation or generation of source code
• CPC Class Codes: G06F 8/41 : Compilation
• CPC Class Codes: G06F 8/427 : Parsing
• CPC Class Codes: G06F 8/60 : Software deployment
• CPC Class Codes: G06Q 40/04 : Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
• CPC Class Codes: H04L 12/18 : for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 51/046 : Interoperability with other network applications or services
• CPC Class Codes: H04L 51/212 : using filtering or selective blocking
• CPC Class Codes: H04L 61/5069 : for group communication, multicast communication or broadcast communication
• CPC Class Codes: H04L 63/101 : Access control lists [ACL]
• CPC Class Codes: H04L 63/102 : Entity profiles
• CPC Class Codes: H04L 67/01 : Protocols
• CPC Class Codes: H04L 67/1001 : for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/141 : Setup of application sessions admission control or resource allocation in data switching networks H04L47/70
• CPC Class Codes: H04L 67/34 : involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 67/56 : Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/566 : Grouping or aggregating service requests, e.g. for unified processing
• CPC Class Codes: H04L 67/568 : Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/5681 : Pre-fetching or pre-delivering data based on network characteristics
• CPC Class Codes: H04L 69/16 : Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]

Abstract

Described are methods, systems and computer readable media for data source refreshing.

Claims

1. A system for updating a data object using an update propagation graph, the system comprising:

one or more hardware processors coupled to a nontransitory computer readable medium having stored thereon software instructions that, when executed by the one or more processors, cause the one or more processors to perform operations including;

receiving, at a remote query processor, a first query from a client, the first query referencing a plurality of data objects including one or more data sources;

determining dependencies between the data objects in the first query;

generating an update propagation graph (UPG) in a context of the remote query processor based on the first query, the UPG having a plurality of nodes each corresponding to one of the data objects, the UPG having a structure representing the dependencies between the data objects in the first query;

determining a logical clock has transitioned to an updating state;

processing one or more changes to one or more corresponding data sources, wherein the changes are processed according to an order determined by the UPG, wherein change processing for each data source includes;

invoking a data source refresh method for a data source for which changes are being processed;

determining whether a priority queue for the data source is empty;

when the priority queue is not empty, retrieving a next change notification message from the priority queue and delivering the change notification to a corresponding data source and repeating determining whether the priority is queue is empty; and

when the priority queue is empty, setting the logical clock to an idle state;

updating the structure of the UPG in response to a second query being executed by the remote query processor; and

after the updating, processing another one or more changes according to a different order determined by the updated UPG.

2. The system of claim 1, wherein the change notifications can include one of a data add notification, a data modify notification, a data delete notification and a data reindex notification.

3. The system of claim 1, wherein each node of the UPG includes one of a dynamic node, a static node and an internal node.

4. The system of claim 1, wherein the operations further include adding an additional notification to the priority queue from a listener associated with the UPG.

5. The system of claim 1, wherein one or more nodes represents a table data object.

6. The system of claim 1, wherein one or more nodes represents a nontabular data object.

7. The system of claim 1, wherein a node can include an internal node that is a data source for another internal node or a data source.

8. The system of claim 1, wherein the operations further comprise determining that a data source has been garbage collected and not performing updating processing for the garbage collected data source.

9. The system of claim 1, wherein the operations further include:

constructing the plurality of nodes in a construction order based on the dependencies between the data objects in the first query,

wherein the order in which the data sources are processed is the construction order.

10. A method for updating a data object using an update propagation graph, the method comprising:

receiving, at a remote query processor, a first query from a client, the first query referencing a plurality of data objects including one or more data sources;

determining dependencies between the data objects in the first query;

generating an update propagation graph (UPG) in a context of the remote query processor based on the first query, the UPG having a plurality of nodes each corresponding to one of the data objects, the UPG having a structure representing the dependencies between the data objects in the first query;

determining a logical clock has transitioned to an updating state;

processing one or more changes to one or more corresponding data sources, wherein the changes are processed according to an order determined by the UPG, wherein change processing for each data source includes;

invoking a data source refresh method for a data source for which changes are being processed;

determining whether a priority queue for the data source is empty;

when the priority queue is not empty, retrieving a next change notification message from the priority queue and delivering the change notification to a corresponding data source and repeating determining whether the priority is queue is empty; and

when the priority queue is empty, setting the logical clock to an idle state;

updating the structure of the UPG in response to a second query being executed by the remote query processor; and

after the updating, processing another one or more changes according to a different order determined by the updated UPG.

11. The method of claim 10, wherein the change notifications can include one of a data add notification, a data modify notification, a data delete notification and a data reindex notification.

12. The method of claim 10, wherein each node of the UPG includes one of a dynamic node, a static node and an internal node.

13. The method of claim 10, further comprising adding an additional notification to the priority queue from a listener associated with the UPG.

14. The method of claim 10, wherein one or more nodes represents a table data object.

15. The method of claim 10, wherein a node can include an internal node that is a data source for another internal node or a data source.

16. The method of claim 10, further comprising determining that a data source has been garbage collected and not performing updating processing for the garbage collected data source.

17. The method of claim 10, further comprising:

constructing the plurality of nodes in a construction order based on the dependencies between the data objects in the first query,

wherein the order in which the data sources are processed is the construction order.

18. A nontransitory computer readable medium having stored thereon software instructions that, when executed by the one or more processors, cause the one or more processors to perform operations including:

receiving, at a remote query processor, a first query from a client, the first query referencing a plurality of data objects including one or more data sources;

determining dependencies between the data objects in the first query;

generating an update propagation graph (UPG) in a context of the remote query processor based on the first query, the UPG having a plurality of nodes each corresponding to one of the data objects, the UPG having a structure representing the dependencies between the data objects in the first query;

determining a logical clock has transitioned to an updating state;

processing one or more changes to one or more corresponding data sources, wherein the changes are processed according to an order determined by the UPG, wherein change processing for each data source includes;

invoking a data source refresh method for a data source for which changes are being processed;

determining whether a priority queue for the data source is empty;

when the priority queue is not empty, retrieving a next change notification message from the priority queue and delivering the change notification to a corresponding data source and repeating determining whether the priority is queue is empty; and

when the priority queue is empty, setting the logical clock to an idle state;

updating the structure of the UPG in response to a second query being executed by the remote query processor; and

after the updating, processing another one or more changes according to a different order determined by the updated UPG.

19. The nontransitory computer readable medium of claim 18, wherein the operations further include:

constructing the plurality of nodes in a construction order based on the dependencies between the data objects in the first query,

wherein the order in which the data sources are processed is the construction order.