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Questions tagged [data-virtualization]

For development issues associated with usage of enterprise data virtualization tools (Tibco DV, Denodo, Informatica DV, etc.)

Data virtualization is any approach to data management that allows an application to retrieve and manipulate data without requiring technical details about the data, such as how it is formatted or where it is physically located.

https://en.wikipedia.org/wiki/Data_virtualization

http://www.compositesw.com/data-virtualization/

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Wpf DataVirtualization

I'm trying to load a rather big list of items into an WPF DataGrid. Problem is: It's painfully slow. Right now I have about 20,000 items in my list and it takes forever (well ... in my latest version it takes about 10 seconds, but that's not nearly…
harri
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UI virtualization using a virtualized collection with more than 2^31 elements

We have a custom database that handle serialized indexed data and we have reached 70% of the capacity of the database (which is int.MaxValue or 2^31 elements). We started analyzing if it would be possible to break this limit by making our own…
mwryl
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C# WPF DataGrid virtualization is slow

I have a DataGrid with 10-15 columns which can have around 100-200 rows. The datagrid is placed within a Tab control ( which is not in focus by default ). I tried to virtualize the DataGrid but when I click the tab containing the DataGrid, the…
mrid
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WPF - VirtualizingStackPanel requests all items when going into editing mode in DataGrid

I am using a DataGrid with CellEditingTemplates. As ItemsSource a data virtualized collection is used (the AlphaChiTech solution), which only fetches pages of a size of 100 items at a time on demand. It works great until a cell is double clicked…
Dima
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Animating 3D scatter plot sequence in Matplotlib

I have timeseries data in 3D: import numpy as np import matplotlib.pyplot as plt import matplotlib.animation as animation from mpl_toolkits.mplot3d import Axes3D # make data xs, ys, zs = np.random.normal(0, 10, 1000), np.random.normal(0, 10,…
crypdick
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WPF DataGrid Column Virtualization

I'm attempting to perform an horizontal virtualization on my DataGrid . My collection is of type : List which it's first dimension length is 64 and second is roughly 5000 I've been using Paul McClean's VirtualCollection to achieve…
eran otzap
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How to get (programatically) the location of a Windows UAC virtualized file?

I have a 32-bit windows old application (with the C/Win32 source) that creates its data file in the same folder where the executable is. Because the application has no installation program and the user can place the executable wherever he/she wants,…
Jose M Balaguer
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WPF Data Virtualization

I have a WPF DataGrid for which data comes from a stored procedure. I want to know how can I virtualize that data?. I am using ADO.NET Entity Framework. My data in the database changes regularly and it needs to be fetched regularly through my…
Satish Nissankala
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Access IBM DVM(Data Virtualization Manager) from linux Unbuntu vm using Python

I am trying to access IBM DVM(Data Virtualization Manager) from linux Unbuntu vm using Python. I have installed JAVA on the unbuntu machine: java -version openjdk version "1.8.0_362" OpenJDK Runtime Environment (build 1.8.0_362-b08) OpenJDK 64-Bit…
sanika sawant
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WPF AutoCompleteBox Data Virtualization

I am trying to implement Data Virtualization on a WPF AutoCompleteBox. I found Bea Stollnitz's code here which works great on a ListView and I made it to work on an ComboBox easily, but there's no way I can seem to get it working right on an…
Alex Florescu
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Implement data virtualisation in a UWP ListView without duplicating items

I have a large ListView which is largely made InkCanvas objects, it turns out that ListView implements data virtualisation to "cleverly" unload and load items in the view depending on the visible items in the view. The problem with this is that many…
reckless
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Denodo Join between disparate sources without cache

I am new to Denodo, just have installed Denodo Express Server.I am running a sample task. I have two disparate data sources (Postgres and MySQL), Postgres has agents table while MySQL has Customer and Orders data. When I execute a join statement…
OsamaTirmizi
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Data Virtualization connection to Azure Data Lake Store Gen1 - WebHDFS/v1/ endpoint

I'm trying to configure Azure Data Lake Store Gen1 (ADLS) as a Data Source in a Data Virtualization software (Tibco's). Reading through the Azure documentation, I got to the webhdfs/v1/ endpoint associated with ADLS and managed to simulate the…
Eduardo Martinez Firgau
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ISupportIncrementalLoading does not work until I scroll in GridView

I've implemented ISupportIncrementalLoading to load a lot of items in a list as the user scrolls. When I load the view, its empty and it will only load more data until I scroll the list. This is the class that implements it public class…
marsalal1014
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Cisco Composite "Catastrophic Failure" using ODBC Driver

I have a working Excel 2013 solution, running fine on Windows 7 Pro. It is a VBA solution connecting to Cisco Composite using the Composite version 7.0 ODBC Driver. I moved to Windows 10 Pro on a new laptop, and have installed the same ODBC Driver.…
smackenzie
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