Filters in JRDS

JRDS can managed quite an high number of nodes, finding it's way within a long lists of nodes can become difficult.

So jrds provides a way to create tree using only a subset of possible graphs, using filter.

A filter is defined by a xml document, as usual, giving

• it's name
• somes tags, only hosts that matches all the tags will be displayed
• some regex filtering graph's tree, any graph whose path match a regex will be displayed.

The doc type for a filter is

<!DOCTYPE filter PUBLIC "-//jrds//DTD Filter//EN" "urn:jrds:filter">

And the DTD is at github

All defined filters are show in the tab “All filters”

So for a graph to be displayed, it must met two conditions :

• all of the given tags must be in the hosts tag
• it's path must match one of the given path.

For example, given the following filter configuration :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE filter PUBLIC "-//jrds//DTD Filter//EN" "urn:jrds:filter">
<filter>
    <name>x86 calculation servers</name>
    <tag>calc node</tag>
    <tag>x86</tag>
    <path>/Sorted by view/System/Memory/.*</path>
    <path>/Sorted by view/.*cpuraw.*</path>
</filter>

A tree called “x86 calculation servers” will be created, and it will display the memory usage and cpu usage for all servers that are tagged by both calc node and x86.