Re: [smartos-discuss] single disk performance question

2018-03-27 Thread Daniel Carosone 
It would also be worth checking if you have a mismatch (or misalignment) on
block size. If the disk is 4k physical, and you have an ashift=9 pool,
you'll lose even more iops to internal rmw cycles.

On Wed., 28 Mar. 2018, 07:10 Ian Collins,  wrote:

> On 03/28/2018 09:04 AM, Jeremy wrote:
>
> The disk is now very fast, only 5400 rpm. I have not done any tests yet. I
> was running hyper-v on the same system with much faster performance, but I
> suspect these are probably not comparable.
>
>
> In SmartOS, KVM writes are synchronous, so performance will suffer (you
> will be IOP bound) on a slow drive without a log device.
>
> --
> Ian.
> *smartos-discuss* | Archives
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Re: [smartos-discuss] single disk performance question

2018-03-27 Thread Ian Collins 

On 03/28/2018 09:04 AM, Jeremy wrote:
The disk is now very fast, only 5400 rpm. I have not done any tests 
yet. I was running hyper-v on the same system with much faster 
performance, but I suspect these are probably not comparable.




In SmartOS, KVM writes are synchronous, so performance will suffer (you 
will be IOP bound) on a slow drive without a log device.


--
Ian.



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Re: [smartos-discuss] single disk performance question

2018-03-27 Thread Jeremy 
typo: Not* very fast

On Tue, Mar 27, 2018 at 4:04 PM, Jeremy  wrote:

> The disk is now very fast, only 5400 rpm. I have not done any tests yet. I
> was running hyper-v on the same system with much faster performance, but I
> suspect these are probably not comparable.
>
> On Tue, Mar 27, 2018 at 3:07 PM, Greg Treantos  wrote:
>
>> how fast is your disk? Did you do any perf testing under other
>> op-systems? I usually will boot a live version of linux and run some basic
>> perf tests. In the newer versions they include a disk test that seems OK.
>> Or you can use something like bonnie++
>>
>> On Tue, Mar 27, 2018 at 2:58 PM, Jeremy  wrote:
>>
>>> I am building a small testing box, just to try out images and to only
>>> run one or maybe two VMs at a time.
>>>
>>> The trouble is, it only has one drive. So any file system operation in
>>> the VM seems to take forever.
>>>
>>> Is there any way to speed this up?  Is is this a limitation of running
>>> ZFS on a single disk.
>>>
>>> Thanks,
>>>
>>> -Jeremy
>>>
>>
>>
>>
>> --
>> Greg
>>
>> http://www.linkedin.com/in/gregtreantos
>> *smartos-discuss* | Archives
>>  | Modify
>> 
>> Your Subscription 
>>
>
>



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Re: [smartos-discuss] single disk performance question

2018-03-27 Thread Jeremy 
The disk is now very fast, only 5400 rpm. I have not done any tests yet. I
was running hyper-v on the same system with much faster performance, but I
suspect these are probably not comparable.

On Tue, Mar 27, 2018 at 3:07 PM, Greg Treantos  wrote:

> how fast is your disk? Did you do any perf testing under other op-systems?
> I usually will boot a live version of linux and run some basic perf tests.
> In the newer versions they include a disk test that seems OK. Or you can
> use something like bonnie++
>
> On Tue, Mar 27, 2018 at 2:58 PM, Jeremy  wrote:
>
>> I am building a small testing box, just to try out images and to only run
>> one or maybe two VMs at a time.
>>
>> The trouble is, it only has one drive. So any file system operation in
>> the VM seems to take forever.
>>
>> Is there any way to speed this up?  Is is this a limitation of running
>> ZFS on a single disk.
>>
>> Thanks,
>>
>> -Jeremy
>>
>
>
>
> --
> Greg
>
> http://www.linkedin.com/in/gregtreantos
> *smartos-discuss* | Archives
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> 
> Your Subscription 
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Re: [smartos-discuss] single disk performance question

2018-03-27 Thread Greg Treantos 
how fast is your disk? Did you do any perf testing under other op-systems?
I usually will boot a live version of linux and run some basic perf tests.
In the newer versions they include a disk test that seems OK. Or you can
use something like bonnie++

On Tue, Mar 27, 2018 at 2:58 PM, Jeremy  wrote:

> I am building a small testing box, just to try out images and to only run
> one or maybe two VMs at a time.
>
> The trouble is, it only has one drive. So any file system operation in the
> VM seems to take forever.
>
> Is there any way to speed this up?  Is is this a limitation of running ZFS
> on a single disk.
>
> Thanks,
>
> -Jeremy
> *smartos-discuss* | Archives
>  | Modify
> 
> Your Subscription 
>



-- 
Greg

http://www.linkedin.com/in/gregtreantos



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[smartos-discuss] single disk performance question

2018-03-27 Thread Jeremy 
I am building a small testing box, just to try out images and to only run
one or maybe two VMs at a time.

The trouble is, it only has one drive. So any file system operation in the
VM seems to take forever.

Is there any way to speed this up?  Is is this a limitation of running ZFS
on a single disk.

Thanks,

-Jeremy



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