anchor.diff:  descriptors percentage |1
   |`file_desc.max` |`fdm`, `fileDescriptorMax` |No |Maximum number of file
   descriptors |1024
  -|`load` |`l` |No |Most recent load average |0.22
   |`cpu` | |No |Recent system CPU usage as percent |12
  +|`load_1m` |`l` |No |Most recent load average |0.22
  +|`load_5m` |`l` |No |Load average for the last five minutes |0.78
  +|`load_15m` |`l` |No |Load average for the last fifteen minutes |1.24
   |`uptime` |`u` |No |Node uptime |17.3m
   |`node.role` |`r`, `role`, `nodeRole` |Yes |Master eligible node (m);
   Data node (d); Ingest node (i); Coordinating node only (-) |mdi
   |`master` |`m` |Yes |Elected master (*); Not elected master (-) |*
  -|`name` |`n` |Yes |Node name |Venom
  +|`name` |`n` |Yes |Node name |I8hydUG
   |`completion.size` |`cs`, `completionSize` |No |Size of completion |0b
   |`fielddata.memory_size` |`fm`, `fielddataMemory` |No |Used fielddata
   cache memory |0b
  
positive.code: mode (`v`). The header name will match the supplied value (e.g.,
  `pid` versus `p`).  For example:
  
  ["source","sh",subs="attributes,callouts"]
  --------------------------------------------------
  % curl 192.168.56.10:9200/_cat/nodes?v&h=id,ip,port,v,m
  id   ip            port v           m
  
negative.code: 
  The `nodes` command shows the cluster topology.
  
  [source,sh]
  --------------------------------------------------
  % GET /_cat/nodes
  192.168.56.30 9 78 22 1.80 2.05 2.51 mdi * bGG90GE
  192.168.56.10 6 75 14 1.24 2.45 1.37 md  - I8hydUG
  192.168.56.20 5 71 12 1.07 1.05 1.11 di  - H5dfFeA
  --------------------------------------------------
  
  The first few columns tell you where your nodes live and give
  a picture of your heap, memory, cpu and load.
  
  [source,sh]
  --------------------------------------------------
  ip            heap.percent ram.percent cpu load_1m load_5m load_15m
  192.168.56.30            9          78  22    1.80    2.05     2.51
  192.168.56.10            6          75  14    1.24    2.45     1.37
  192.168.56.20            5          71  12    1.07    1.05     1.11
  --------------------------------------------------
  
  The last columns provide ancillary information that can often be
  useful when looking at the cluster as a whole, particularly large
  ones.  How many master-eligible nodes do I have?
  
  [source,sh]
  --------------------------------------------------
  node.role master name
  mdi       *      bGG90GE
  md        -      I8hydUG
  di        -      H5dfFeA
  --------------------------------------------------
  
  [float]
  