raw filesystem counters

[Ronald Klop]

Maybe start following this developer also:
https://twitter.com/freebsdfrau/status/963589688278724608

Regards,
Ronald.


On Tue, 13 Feb 2018 20:56:06 +0100, E.S. Rosenberg  
<esr+freebsd-fs at mail.hebrew.edu> wrote:

> Wow Eric that is exactly what I was looking for!
> Thanks!
> Nothing similar exists for ZFS correct?
> Thanks again,
> Eli
>
> On Mon, Feb 12, 2018 at 10:09 PM, Eric A. Borisch <eborisch at gmail.com>
> wrote:
>
>> On Sun, Feb 11, 2018 at 1:06 PM, E.S. Rosenberg <esr at cs.huji.ac.il>  
>> wrote:
>> > Hi,
>> > Hopefully I'm not asking something that has been answered thousands of
>> > times, I did search but did not find.
>> >
>> > Is there any way to access raw disk counters similar to those found on
>> > Linux in:
>> > /sys/class/block/<device>/stat
>> >
>> > Preferably also by accessing such a virtual file and not by using  
>> iostat
>> /
>> > zpool iostat which are already pre-processing counters and need to be  
>> run
>> > constantly to get accurate real-time estimates.
>> >
>> > So far I have not stumbled upon the right sysctl key to get these
>> counters
>> > (and TBH as said before I'd much rather read a "file" then run a  
>> command
>> > though that matters less as long as the counters are raw).
>> >
>> > Background: I'm trying to get a better idea of what is going on with  
>> our
>> > IO, I would like to push the counters into Zabbix and maybe other data
>> > analysis software later so I prefer raw counters that can then be
>> processed
>> > by whatever software we are using.
>> >
>> > Thanks!
>> > Eli
>>
>>
>> iostat -Ixd dev0 [dev1 ..]
>>
>> Gives from-boot cumulative values; these can be shoved (with minimal
>> awk processing) into Zabbix and pre-processed to "change per second"
>> on the Zabbix server. Read/write ops/bytes as well as some other
>> interesting stats.
>>
>>  - Eric
>>
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