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DataSources and Realms introduce a completely new paradigm to managing large
amounts of complex organized data in a flexible manner.
DataSources
,
Realms
and the
Namespace Controller
are part of RiskServers
FRM development framework.
As such they are part of the basic building block of every components in
RiskServers Financial-Risk-Manager product suite:
- Risksvr™ Calculation Engine.
- Financial-Risk-Manager module.
- Unitized Time-Series-Manager.
- XlStream 3
- XlDataSnap
- CreditCurveManager, etc.
First Steps Into Realms and DataSources
Realms and DataSources are advanced capabilities provides by all RiskServers
FRM components.
Realms and DataSources should really be of interest to intermediate and
advanced users who want to get more out of their analytics. If you are starting
off, we recommend you run first run Risksvr™ online before you get involved into
Realms.
Realms and DataSources are a brand new way of managing dependant hierarchies
of complex data. They provide limitless configuration opportunities, are easy
to use once you understand the basic rules and offer tremendous analytic leverage.
Moreover, Realms offer the possibility to switch between multiple configurations
transparently.
Data Sources and Realms are unique to RiskServers products.
To our knowledge no other product offers such a powerful and flexible approach
to sinking and sourcing data.
What are Realms and DataSources?
A Realms is essentially an ordered hierarchy of DataSources.
As its name
implies, a DataSource defines the specifications of a source of Data.
Note: The Name DataSource is used
interchangeably for both data sources (data from which Risksvr™ will read from
and data sinks (data that Risksvr™ will write to.)
A default Realm is always necessary so
that components can "talk" to each other.
The Realm acts as the default data repository where data can
either be stored or sourced.
Data Sources and Realms can seem daunting at first glance. The most important
thing to understand at this stage is the concept of Default Realm and
Default DataSource.
To Run, Risksvr™ needs at least a default Realm. If you accept the
default settings, the default realm will be called Default.
Each Realm Contains a Default DataSource for Input, usually called Input
and a default DataSource for output called Output
Every Realm has a series of attributes. The most important attributes
you must know at this stage are:
- The Schema.
- The
Scope or namespace hierarchy*
- The
Synchronization Policy.
- etc.
Every DataSource also carries a number of attributes:
- Alternate Schema
- Input Layout (name-value-pairs, xml,. csv.., raw binary!.
- Output Layout (name-value-pairs, xml, csv...,raw binary).
- Synchronization Policy.
- Scope or namespace hierarchy.
- Traits: Date Type, Date Format, Decimal Separator.
- Connector: File, Shared Memory, Sockets, named pipes, database connectors.
-
etc.
-
The Default Realm
acts as the fallback location when data is missing from it's dedicated realm.(if defined)
-
The name is the root of the realm .
-
The Alias is the name given to the entire Realm
hierarchy.
Configure Realms through the Settings Dialog
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All Stand-Alone applications provide a common user interface to
manage DataSources and Realms.
This interface is accessed through the Settings menu or
button.
The Default Settings opens the Realm interface.
The First Realm displayed in the Realm tree or tabbed display is the Default Realm also known as the
Default INPUT realm.
The default realm provides a fallback location for any missing
realm, realm group or realm-sub group.
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The button on the right hand side of the Realm Name allows
multiple operations. The default operation is to create a "New
Realm".
Selecting other Operations
To change the "New button", right click the New button with
your mouse. Once the Label changes to the Menu Item you have
selected, you can click on the Button to execute the requested
operation
Moving down the Realm hierarchy
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If you click on one of the Items Realms you get a lower
level Realm (either a Group, Sub Group, etc until you reach the
DataSource itself. |
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Summary
The Settings tab provides a simple graphical user interface to Realms and
DataSource Hierarchies and other settings specific to each module.
Used properly Realms and DataSources add tremendous power to your real-time
analytics both in terms of flexibility, ease of use and management.
DataSources and Realms are invisible to
online users:
DataSources and Realms make all components work seamlessly with each
other.
This is so much the case for all components available online that
they are completely invisible to the average user.
DataSources and Realms are not invisible to stand-alone users:
Advanced user who need to unleash the power.
If you are using any standalone application for front-office real-time analytics.
f you want to extend analytical power.
if you need to connect the engine to multiple third party systems.
DataSources and Realms are different for
online and LAN users:
Online and LAN users have different access permissions to
DataSources and Realms.
The Online user has two realms: His personal realm and his data group
realm.
The data group realm provides a read-only access to market data that is
shared amongst users, whereas the personal realm is controlled by the
user.
LAN users can define as many realm as their system administrator deems
fit.
It is therefore important to understand what these two elements bring to
you in terms of connectivity and flexibility.
A Quick list of the most important DataSources and their respective
second level sub-group Realm. In most cases, the second level sub-group
Realm is the penultimate Realm before the default INPUT (respectively
Output) Realm.
At a lower level (usually 4th or 5th level), lies the DataSources. All
DataSources have a
sibling Realm). This Realm carries the same name as the DataSource
itself and allows users to optionally define an individual
characteristic for each and every DataSource sourced or sinked by
Risksvr™.
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