explanation of fioparse output...

khailey-zz / fio_scripts

scripts for running fio, parsing the data and graphing the output

139 stars 66 forks source link

explanation of fioparse output... #7

Closed abdulirfan3 closed 8 years ago

abdulirfan3 commented 8 years ago

Hi Kyle,

I find these script very useful, I am looking to get some explanation with regards to the fioparse.sh script..

For example in the above screenshot I want to understand what does the column "ms, min, max" mean? If min, max is in millisecond, then what does the ms column mean ?

Also with regards to the screenshot above(high lighted line), If MAX time it took was 1134 millisecond(1.34 seconds), then why is 95% of the operations falls under "2s" histogram ?

Just trying to understand this output. as i am unable to find any documentation on it. I suppose I can always look at the script, but I am not so good in perl

khailey-zz commented 8 years ago

There are multiple IOs Min is the fastest Max is the slowest 95% is the response time that 95% of the IOs finish in

Sent from my iPhone

On Aug 3, 2016, at 12:44 PM, abdulirfan3 notifications@github.com wrote:

Hi Kyle,

I find these script very useful, I am looking to get some explanation with regards to the fioparse.sh script..

For example in the above screenshot I want to understand what does the column "ms, min, max" mean? If min, max is in millisecond, then what does the ms column mean ?

Also with regards to the screenshot above(high lighted line), If MAX time it took was 1134 millisecond(1.34 seconds), then why is 95% of the operations falls under "2s" histogram ?

Just trying to understand this output. as i am unable to find any documentation on it. I suppose I can always look at the script, but I am not so good in perl

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub, or mute the thread.

abdulirfan3 commented 8 years ago

Thank you Kyle. What about the "ms" column ?? is that the avg ?? if that is the average, can you please help me understand the below(from the high lighted screenshot)

ms(avg?) = 1047.6 min = 29.0 max = 1134.0

under histogram 1s = 4 2s = 95

if my min is 29 ms, shouldn't that be accounted for in the 20ms - 50ms histogram ?? or is that missing due to std ?

khailey-zz commented 8 years ago

Ms is average A histogram bucket an be empty because the buckets show % not count so if the % is under .5 it won't show up

Sent from my iPhone

On Aug 3, 2016, at 1:58 PM, abdulirfan3 notifications@github.com wrote:

Thank you Kyle. What about the "ms" column ?? is that the avg ?? if that is the average, can you please help me understand the below(from the high lighted screenshot)

ms(avg?) = 1047.6 min = 29.0 max = 1134.0

under histogram 1s = 4 2s = 95

if my min is 29 ms, shouldn't that be accounted for in the 20ms - 50ms histogram ?? or is that missing due to std ?

— You are receiving this because you commented. Reply to this email directly, view it on GitHub, or mute the thread.

abdulirfan3 commented 8 years ago

Thank you Kyle for all that information.