zfs very poor performance compared to ufs due to lack of cache?

Steven Hartland killing at multiplay.co.uk
Wed Sep 15 21:30:55 UTC 2010


----- Original Message ----- 
From: "jhell" jhell at DataIX.net

> On 09/15/2010 06:54, Steven Hartland wrote:
>> ----- Original Message ----- From: "Jeremy Chadwick"
>> <freebsd at jdc.parodius.com>
>>> Looks like Andriy just committed something to HEAD/CURRENT which might
>>> address this:
>>> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/141305
>> 
>> Already running that as part of the patches unfortunately, it doesn't seem
>> to have any effect.
>> 
> 
> Is it ? vm_page_set_validclean(m, off, bytes);
> I recall you saying that you added this from earlier in the thread.
> could be wrong though but what Andriy committed was the following.
> 
> or ? vm_page_set_valid(m, off, bytes);


Ahh good catch I have:
    if (error == 0)
        vm_page_set_validclean(m, off, bytes);

and not as mentioned by 141305:
    if (error == 0)
        vm_page_set_valid(m, off, bytes);

Which should it actaully be?

    Regards
    Steve

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