Heatmap

That feature shows actual utilization of all SAN ports, storage pools and volumes in the table where each item has color based on its response time during last hour.
Each heatmap is refreshed every hour.

Types

• Storage heatmap
  • Pool
  • Volume
• SAN switch heatmap
  • Port Data IN
  • Port Data OUT

Storage

Heatmap is based on average read or write (in/out) response time (latency) of each pool and volume in past 1 hour.
Storage which do not provide response time at all (old firmwares of IBM DS3/4/5k) are excluded.

Tiers

It is further divided into tiers. Each tier has its own thresholds.
All pools are by default in tier1, you can easily change tier assignment in "Configuration" tab.
Volumes inherit tier assigment of their pools.

Minimum IO thresholds

Pool or volumes with low IO utilization are excluded from the heatmap. Each tier has its own utilization exclude thresholds

Configuration

• Tier assignment: use UI "Configuration" page to assign tiers into your pools
• Tier thresholds and colors.
  You can define new or delete existing tiers, put you colors, change thresholds etc, everything is customizable here
  

  $ vi /home/stor2rrd/stor2rrd/etc/heatmap-color.cfg
  
  Tier,Response_limit:Color,IO_limit_pool,IO_limit_volume
  tier0,0.1:#008000 0.2:#29f929 0.3:#81fa51 0.4:#c9f433 0.5:#FFFF66 0.6:#ffff00 0.7:#FFCC00 0.8:#ffa500 0.9:#fa610e 1.0:#ff0000,500,50
  tier1,2:#008000 2.4:#29f929 2.8:#81fa51 3.2:#c9f433 3.6:#FFFF66 4:#ffff00 4.6:#FFCC00 5:#ffa500 5.4:#fa610e 5.8:#ff0000,100,10
  tier2,4:#008000 4.7:#29f929 5.4:#81fa51 6.1:#c9f433 6.8:#FFFF66 7.5:#ffff00 8.2:#FFCC00 8.9:#ffa500 9.6:#fa610e 10.1:#ff0000,100,10
  tier3,8:#008000 10:#29f929 11:#81fa51 12:#c9f433 13:#FFFF66 14:#ffff00 15:#FFCC00 16:#ffa500 17:#fa610e 18:#ff0000,100,10
  

  Refresh heatmap after change in cfg file (usually it does next schedulled load.sh)

  $ ./load.sh heatmap
  

  	Color												Pool IO min	Volume IO min
  tier0													500	50
  		nan	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
  tier1													100	10
  		nan	2	2.4	2.8	3.2	3.6	4	4.6	5	5.4	5.8
  tier2													100	10
  		nan	4	4.7	5.4	6.1	6.8	7.5	8.2	8.9	9.6	10.1
  tier3													100	10
  		nan	8	10	11	12	13	14	15	16	17	18

Examples

SAN

Examples

LEGEND: