On Dec 1, 2012, at 6:54 PM, "Nikola M." <minik...@gmail.com> wrote:

> On 12/ 2/12 03:24 AM, Nikola M. wrote:
>> It is using Solaris Zones and throttling their disk usage on that level,
>> so you separate workload processes on separate zones.
>> Or even put KVM machines under the zones (Joyent and OI support 
>> Joyent-written KVM/Intel implementation in Illumos)  for the same reason of 
>> I/O throttling.
>> 
>> They (Joyent) say that their solution is made in not too much code, but 
>> gives very good results (they run massive cloud computing service, with many 
>> zones and KVM VM's so they might know).
>> http://wiki.smartos.org/display/DOC/Tuning+the+IO+Throttle
>> http://dtrace.org/blogs/wdp/2011/03/our-zfs-io-throttle/
>> 
> There is short video from 16th minute onward, from BayLISA meetup at Joyent, 
> August 16, 2012
> https://www.youtube.com/watch?v=6csFi0D5eGY
> Talking about ZFS Throttle implementation architecture in Illumos , from 
> Joyent's Smartos.

There was a good presentation on this at the OpenStorage Summit in 2011.
Look for it on youtube.

> I learned it is also available in Entic.net-sponsored Openindiana
> and probably in Nexenta, too, since it is implemented inside Illumos.

NexentaStor 3.x is not an illumos-based distribution, it is based on OpenSolaris
b134.

 -- richard

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