BOF Discussion: Uploading IEPMBW data to MonALISA

1
BOF Discussion Uploading IEPM-BW data to MonALISA

• Connie Logg
• SLAC
• Winter 2006 ESCC/Internet2 Joint Techs Workshop
• February 4-9, 2006

2
Overview

• Several discussions about uploading IEPM-BW data
  and alerts to MonALISA
• Consider
• What parts of data (varies with probe type)
• Mechanism (every n minutes or as data is taken)
• What parts of ALERTS?

3
Data Fields

• Vary with type of probe
• PING RTT (min, avg, max), Packets sent, Packets
  Received, Packet order (probably not)
• ? Traceroute list of IP addresses in the
  traceroute

4
Data Fields - Continued

• IPERF - streams - Window size, throughput
  achieved. With incremental reporting are the
  thruput min, max, avg and std dev of incremental
  values of interest ? (I do not think so)

5
Data Fields - Continued

• THRULAY TCP total thruput RTT min, max, and
  avg. With incremental reporting are the thruput
  min, max, avg and std dev of incremental values
  of interest? (I do not think so)
• PATHCHIRP achievable bandwidth min, avg, max of
  chirping steps - NO

6
Data Fields - Continued

• PATHLOAD min and max of thruput range ?
• CAVEATS Only upload data from relevant and
  quality probes for example Pathchirp works well
  on some paths, and not so well on others.

7
ALERTS

• IEPM-BW has an algorithm for auto detection of
  bandwidth drops.
• Need to choose only alerts on relevant and
  quality probes
• Do not flood MonALISA with every alert that is
  detected.

8
ALERT Mechanism

• Baseline data in history buffer has a mean
  and std dev
• Data less than (mean 2 std dev) is put in
  trigger buffer for examination
• Trigger buffer also has mean and std dev.
• When trigger buffer is full and
• (history_mean trigger_mean)/history_mean meets
  or exceeds the drop threshold, an ALERT is
  generated.

9
ALERTS Info to Upload

• Baseline mean and std dev of history buffer
  before drop
• Date and time when drop is detected in trigger
  buffer
• Percentage of drop from history mean to trigger
  mean
• Mean and std dev of trigger buffer
• Values in Trigger buffer (probably not)

10
Guidance/Input Needed

• What probes, how frequent, and length of history
  and trigger buffers
• What probe data to upload to MonALISA
• What alert information to upload to MonALISA
• How to upload information to MonALISA
• Other thoughts, comments and suggestions