nKeep
alive strings used by Hazards’ dt disk wrapper:
n
n% dt of=dt.data bs=32k limit=1g disable=pstats,verbose
stats=brief \
n keepalive=“count
= %C; e = %e; t = %S; IOpS = %IOPS; SpIO = %SPIO” \
n tkeepalive=“STAT
+RawMbytes %MBPS +RawReads %R +RawWrites %W” \
n alarm=15s
runtime=1m3s
ndt: count = 32768; e = 0; t = 15; IOpS = 2184.533; SpIO =
0.0005
ndt: count = 45077; e = 0; t = 30; IOpS = 1502.567; SpIO =
0.0007
ndt: count = 80049; e = 0; t = 45; IOpS = 1778.867; SpIO =
0.0006
ndt: count = 98304; e = 0; t = 60; IOpS = 1638.400; SpIO =
0.0006
ndt: STAT +RawMbytes 46.574 +RawReads 46242 +RawWrites
65536
n%
nExternal
tools/scripts can monitor statistics during runs.
nNote:
alarm option also used by I/O monitoring feature.
ukeepalivet=value
– Controls keepalive time (in seconds).