CONFIGURATION

internal memory for sorting = 650 MB

EdgeVector default block size = 2048 KB
EdgeVector default #pages = 1
EdgeVector default page size = 4 block(s)

MST vector block size = 2048 KB
MST vector #pages = 1
MST vector page size = 4 block(s)

external bucket block size = 512 KB
external bucket page size = 1 block(s)

internal buckets: no of blocks = 1500000
internal buckets: edges per block = 8

Duplicates are removed.

The input is randomized.
--------------------

STXXL-DISK-CONFIGURATION (.stxxl)

disk=/mnt/hdq/stxxl,70000,syscall
disk=/mnt/hdi/stxxl,70000,syscall
disk=/mnt/hdk/stxxl,70000,syscall
disk=/mnt/hde/stxxl,70000,syscall

--------------------

GRID GRAPH

#nodes = 8.00e+07 ( = 20000 x 4000 )
#edges = 1.60e+08
#buckets = 0
#nodes which fit in internal memory = 1.60e+08
--------------------

EVENTS
total time:   0.00000 sec., section time:   0.00000 sec.  -  begin
total time: 108.61160 sec., section time: 108.61160 sec.  -  graph generated/imported
total time: 197.13401 sec., section time:  88.52240 sec.  -  Kruskal: edges sorted
total time: 198.68034 sec., section time:   1.54634 sec.  -  Kruskal: data structures initialized
total time: 470.93219 sec., section time: 272.25185 sec.  -  Kruskal: edges processed
total time: 471.00536 sec., section time:   0.07317 sec.  -  end
--------------------

RESULT
Minimum Spanning Tree:
total weight = 21377947199042
#edges = 79999999
--------------------

TIMING

total time = 3.62394e+02 sec.
time / m = 2.26530e-06 sec.
time / (m ln m) = 1.19917e-07 sec.
[m = #edges] 
--------------------

DUPLICATES
#duplicates removed = 0
--------------------