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# HW1 - 0.1 mS Sdr = Tc Tsr Trr Tt 18.54 mS Job compute Sds =...

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Sheet1 Page 1 Start unit Multiplier Final unit mS 1 mS S 1000 mS Min 60000 mS Hours 3600000 mS Days 86400000 mS Years 31536000000 mS

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Sheet2 Page 2 Given By: Ben Viall Requests arrive at 10 Jobs / S 02/06/2008 Therefore Lambda = 0.01 Jobs / mS Random = 10.00% Not random = 90.00% Block Size = 1024 Bytes Average run length= 10 Disk rotational speed= 3600 Rot / Min Therefore Rotation Time = 16.67 mS / Rot Seek random = 10 mS Transfer Rates 1.00E+07 Bytes / S Control time = 0.1 mS Compute Sdr = Tc + Tsr + Trr + Tt Tc = given 0.1 mS Tsr = Seek Random 10 mS Trr = ½ * Rotation Time 8.33 mS Tt = Blk Sz/Transfer Rt.
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Unformatted text preview: 0.1 mS Sdr = Tc + Tsr + Trr + Tt 18.54 mS / Job compute Sds = Tc + Pmiss*Tt + Tss +Trs Tc= given 0.1 mS Pmiss=1/Run Length 10.00% Tt = Blk Sz/Transfer Rt. 0.1 mS Tss = Seek rand/Run Len 1 mS U1st guess 0.19 Trs(1st)= 9.72 mS Sds= 10.83 Compute Sd=R*Sdr+(1-R)*Sds Sd 11.6 11.14 11.10 11.10 11.10218695 11.10218695 New U 0.12 0.11 0.11 0.11 0.11102187 0.11102187 New Trs 9.2 9.17 9.17 9.17 9.16599735 9.16599735 New Sds 10.31 10.28 10.28 10.28 10.27623735 10.27623735 2 nd 3 rd 4 th 9 th 10 th...
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HW1 - 0.1 mS Sdr = Tc Tsr Trr Tt 18.54 mS Job compute Sds =...

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