* Re: Delivery Status Notification (Failure)
[not found] ` <20cf30564493a84040049c39612f@google.com>
@ 2011-02-14 8:08 ` wu meng
2011-02-14 9:15 ` Jens Axboe
0 siblings, 1 reply; 2+ messages in thread
From: wu meng @ 2011-02-14 8:08 UTC (permalink / raw)
To: fio
Hi,
I've a problem on using fio:
"buffered=bool If value is true, use buffered io. This is the opposite
of the 'direct' option. Defaults to true."
So what kind of buffer mean for this option? Is that mean kernel cache
or user space buffer?
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Delivery Status Notification (Failure)
2011-02-14 8:08 ` Delivery Status Notification (Failure) wu meng
@ 2011-02-14 9:15 ` Jens Axboe
0 siblings, 0 replies; 2+ messages in thread
From: Jens Axboe @ 2011-02-14 9:15 UTC (permalink / raw)
To: wu meng; +Cc: fio
On 2011-02-14 09:08, wu meng wrote:
> Hi,
>
> I've a problem on using fio:
> "buffered=bool If value is true, use buffered io. This is the opposite
> of the 'direct' option. Defaults to true."
> So what kind of buffer mean for this option? Is that mean kernel cache
> or user space buffer?
'direct' and 'buffered' control the same thing, they are just opposites.
Both refer to the use of kernel file cache bypass.
--
Jens Axboe
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-02-14 8:08 ` Delivery Status Notification (Failure) wu meng
2011-02-14 9:15 ` Jens Axboe
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