Re: nfsstat --sleep=#

["J. Bruce Fields" <bfields@fieldses.org>]

On Thu, Mar 12, 2009 at 09:45:04AM -0700, Kevin Constantine wrote:
> J. Bruce Fields wrote:
>> On Thu, Mar 12, 2009 at 12:08:57PM -0400, Chuck Lever wrote:
>>> On Mar 12, 2009, at Mar 12, 2009, 11:50 AM, J. Bruce Fields wrote:
>>>> On Thu, Mar 12, 2009 at 10:00:34AM -0400, Chuck Lever wrote:
>>>>> Hi Kevin-
>>>>>
>>>>> man watch(1)
>>>> What would you watch?
>>> For example:
>>>
>>>   watch -n3 nfsstat -c
>>>
>>> You can also use the "-d" option to highlight the differences between 
>>>  the current sample and the previous sample.
>>
>> He was asking for deltas; the above only gives cumulative totals.
>>
>> There's no accurate one-line solution using the existing nfsstat
>> commandline, but it should be easy to add.
>>
>
> Something like this sort of works:
> watch -n 1 'nfsstat --since /tmp/stats; nfsstat >/tmp/stats', but it  
> feels more like a workaround than a feature.

It's also slightly inaccurate, since it misses any activity that
happened in the brief time between the two invocations.

> Using watch doesn't allow you to see what happened in the past either.
>
> Moving to a listed output format instead of the traditional nfsstat  
> output (as seen below) makes it trivial with a simple grep to watch the  
> stats that you really care about and ignore the rest.

I think we'd all be happy to take patches.--b.


> -kevin
>
>
>> --b.
>>
>>>> --b.
>>>>
>>>>> On Mar 11, 2009, at Mar 11, 2009, 9:37 PM, Kevin Constantine wrote:
>>>>>
>>>>>> I'd really like to have a way to output the nfsstat counters at
>>>>>> regular intervals (every 3 seconds) where the output is the   
>>>>>> difference
>>>>>> between 3 seconds ago and now.  Frequently I'll run a test and  
>>>>>> want to
>>>>>> watch the nfs call profile throughout the course of the test.
>>>>>>
>>>>>> Does something like this already exist?
>>>>>> Are there objections to seeing a feature like this?
>>>>>>
>>>>>> I'm thinking something like:
>>>>>> nfsstat --sleep=1
>>>>>>
>>>>>> nfs v3 call:   Server   Client
>>>>>>      total:        0     3476
>>>>>>       null:        0        0
>>>>>>    getattr:        0     1679
>>>>>>    setattr:        0        0
>>>>>>     lookup:        0      839
>>>>>>     access:        0      839
>>>>>>   readlink:        0        0
>>>>>>       read:        0        0
>>>>>>      write:        0        0
>>>>>>     create:        0        0
>>>>>>      mkdir:        0        0
>>>>>>    symlink:        0        0
>>>>>>      mknod:        0        0
>>>>>>     remove:        0        0
>>>>>>      rmdir:        0        0
>>>>>>     rename:        0        0
>>>>>>       link:        0        0
>>>>>>    readdir:        0        0
>>>>>> readdirplus:        0        0
>>>>>>     fsstat:        0      119
>>>>>>     fsinfo:        0        0
>>>>>>   pathconf:        0        0
>>>>>>     commit:        0        0
>>>>>>
>>>>>> --
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>>>>> -- 
>>>>> Chuck Lever
>>>>> chuck[dot]lever[at]oracle[dot]com
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe 
>>>>> linux-nfs" in
>>>>> the body of a message to majordomo@vger.kernel.org
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>>> -- 
>>> Chuck Lever
>>> chuck[dot]lever[at]oracle[dot]com
>>>
>>>
>>>
>>>
>>> --
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