Keepalive Example
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).
6/30/2010
Data Test Program (dt)
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