Transcript Presentation given at GGF7

WP7 Network Monitoring
Schemata
Richard Hughes-Jones / Peter
Clarke / Paul Mealor
Menu
• LDAP schema
• R-GMA schema
LDAP schema design
considerations
• LDAP schema for MDS
• Publication of most recent measurements
• Early work
– Easy to add new metrics to
– Easy to add new measurement parameters to
– MDS was harder to add new classes to
LDAP schema
objectclass ( 1.3.6.1.4.1.8005.666.2.4.26
NAME 'NetworkMeasurement‘
DESC 'Describes a single measurement.‘
SUP ( NetworkMonitorSource $
NetworkMonitorDest $ NetworkMonitorMetric )
STRUCTURAL
MUST ( NMMeasureId $ MetricValue $
MetricTime )
)
objectclass ( 1.3.6.1.4.1.8005.666.2.4.22
NAME 'NetworkMonitorMetric'
DESC 'Describes a single metric and its
parameters.Abstract: do not use.'
SUP NetworkMonitorToolName
ABSTRACT
MUST ( MetricName $ MetricUnit )
MAY ( Parameter )
)
objectclass ( 1.3.6.1.4.1.8005.666.2.4.24
NAME 'NetworkMonitorSource'
DESC 'Describes a network monitoring host
from which measurements are made. This is here
to help the with implementation.'
SUP DataGridTop
STRUCTURAL
MUST ( SourceHost )
MAY ( SourceSite $ SourceNE )
)
objectclass ( 1.3.6.1.4.1.8005.666.2.4.25
NAME 'NetworkMonitorDest'
DESC 'Describes a network monitoring host to
which measurements are made. This is here to
help the with implementation.'
SUP DataGridTop
STRUCTURAL
MUST ( DestHost )
MAY ( DestSite $ DestNE )
)
LDAP schema in use
objectClass: NetworkMeasurement
nmMeasureId: foo.ac.uk/bar.ac.uk/rttavg
sourceHost: a.foo.ac.uk
destHost: b.bar.ac.uk
sourceNE: foo.ac.uk
destNE: bar.ac.uk
metricName: rttavg
metricUnit: ms
parameter: packetsize:100
parameter: packets:10
metricValue: 67
metricTime: 20020625123506Z
This contains the average
RTT of a measurement
between a.foo.ac.uk and
b.bar.ac.uk that was made
with 10 packets of 100bytes
each.
Mappings between source
and destination “NEs” and
Computing or Storage
Elements held elsewhere
R-GMA schema design
considerations
• Relational database schema
– R-GMA looks a lot like a relational database
• R-GMA allows historical information
• Different tables for different metrics
– Better understanding of network monitoring
– Adding new tables easier
– Much better for SQL queries
R-GMA schema tables
NetworkRTT

NMIdSource
NMIdDestination 
tool
packetSize
time
NetworkTCPThroughput
minimum
NMIdSource
maximum
NMIdDestination
average
tool
bufferSize
streams
duration
time
value
NetworkCE
1
CEId
NetworkCE
1 NMId
CEId
1 NMId
NetworkSE
SEId
1
NMId
ComputingElement

CEId
GRAMVersion
Architecture
OpSys
&c…