Understanding and Maintaining Collected Data › Data Collection › 15-Minute Data

15-Minute Data

The following types of data are collected and stored as 15-minute resolution data by default.

Overall Traffic

• Total IP, TCP, and UDP traffic that travels in and out of each interface
• Flows and bytes of flow traffic that travels in and out of each interface
• Total flow traffic from each router

While 15-minute data reflect totals for each interface, Enterprise Overview data reflects totals for all interfaces. For example, Enterprise Overview data includes the Top N protocols for all interfaces. The 15-minute data includes the Top N protocols for each interface.

Hosts

Traffic to and from the top 50 IP hosts

Conversations

Traffic for the top 50 IP conversations

Protocols

• Overall: Top 100 protocols in and out of each interface

  Reserved Seating rules let you include specific protocols in the top protocols group regardless of their traffic volume.

• Protocol-Hosts: Traffic to and from the top 10 hosts for the top 20 protocols
• Protocol-Conversations: Traffic for the top 10 conversations for the top 20 protocols

ToS

• Overall: Total IP traffic in and out of each interface for each ToS value
• ToS-Protocols: Traffic for the top 20 protocols for the top 5 non-zero ToS values
• ToS-Hosts: Traffic for the top 10 hosts for the top 5 non-zero ToS values
• ToS-Conversations: Traffic for the top 10 conversations for the top 5 non-zero ToS values

AS

• Top 100 source and destination AS values
• Top 20 next hop addresses for each AS value

AS traffic is stored for 100 days by default.

Data Lifespan: Each data type has a default maximum storage period, as shown in the following list:

• Overall traffic: 372 days or 12.4 months
• Protocols (Top 100): 372 days or 12.4 months
• Hosts, Protocol-Hosts, and ToS-Hosts: 67 days
• Conversations (Top 50), Protocol-Conversations, and ToS-Conversations: 67 days
• ToS and ToS-Protocols: 372 days or 12.4 months
• AS: 100 days

Minimum Thresholds: To be included in a 15-minute data report, data traffic must meet or exceed the default minimum thresholds for the 15-minute period:

• Protocols: 50 KB
• Hosts: 100 KB
• Conversations: 100 KB
• ToS: No minimum
• AS: No minimum

Storage Location: Historic (15-minute) data is stored on the new Harvester in a two-tier deployment and on the DSA on a three-tier deployment.

Reports: 15-minute data is often used for examining trends and performing capacity analysis. This data appears in the following reports:

• Interface reports that are configured to show time ranges of more than 2 hours
• Custom reports
• Analysis reports
• Views and reports of CA Network Flow Analysis data that are configured to show time ranges of more than 2 hours, which are shown in CA Performance Center or CA NetQoS Performance Center