[Veritas-vx] vxtrace output

[Carl Ma]

Thanks, this is important. My understanding of concurrency means this I/O
operation was split into 31 sub-tasks and are running at the same time?


On 9/20/10 10:43 PM, "William Havey" <bbhavey at gmail.com> wrote:

> "op" is short for "operation". Each line in the output of vxtrace is prefixed
> with a number. This "op number" tells you which other lines forms a complete
> trace of an I/O. Examine the output of vxtrace for all lines containing "4275"
> and all these lines represent one I/O.
> 
> On Mon, Sep 20, 2010 at 6:20 PM, Carl E. Ma <zhu_junca at yahoo.ca> wrote:
>> Hi,
>> 
>> We are using volume manager 5.0 on solaris 9. I have difficulty to interpret
>> vxtrace output. What does "op" and "concurrency" stand for?
>> 
>> ==example of output line===
>> 4275 START write vdev homevol01 block 5771246912 len 128 concurrency 31 pid
>> 6134
>> 4254 END write vdev homevol01 op 4254 block 208575678 len 16 time 0
>> ==end of example===
>> 
>> Doug has a script using field $9 and $11 to determine whether this is a
>> random or sequential operation. Is it still valid in latest vxvm?
>> 
>> Thanks in advance,
>> 
>> carl
>> 
>> 
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>> 
> 
> 
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