On 20 January 2015 at 16:55, Greg Zartman via smartos-discuss <
[email protected]> wrote:

> On Mon, Jan 19, 2015 at 5:04 PM, Greg Treantos via smartos-discuss <
> [email protected]> wrote:
>
>> Is there a mixed message from the SmartOS team. On one hand SmartOS is
>> pushed as a stateless platform thus the exclusion of UPS monitoring.
>> Reading this thread it seems like the answer hey if you want performance
>> you need to spend big bucks on a battery backup log device.I don't get it.
>>
>
> This was kind of my initial thought as well.  However; after some
> research, this is not something isolated to SmartOS.  Vmware ESXi has the
> same issue with VM containers on zfs.   This is more of a zfs "Thing" to be
> aware of.   I hesitate to call this a problem because the gurus are saying
> this behavior is by design.
>
> Bottom line is that KVM performance is going to really suck on many
> hardware platforms unless you deal with it as discussed in this tread.
>
>
Any sync (file) operation will suffer when dealing with latency.

This is always a design choice for any system - it's not restricted to
smartos.


Nicholas



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