Re: DONTNEED fadvise flag

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> On Mar 21, 2016, at 18:17, Kenneth Waegeman <kenneth.waegeman@xxxxxxxx> wrote:
> 
> Thanks! As we are using the kernel client of EL7, does someone knows if that client supports it?
> 

fadvise DONTNEED is supported by kernel memory management subsystem. Fadvise DONTNEED works for all filesystems (including cephfs kernel client) that use page cache. 

Yan, Zheng
 
> On 16/03/16 20:29, Gregory Farnum wrote:
>> On Wed, Mar 16, 2016 at 9:46 AM, Kenneth Waegeman
>> <kenneth.waegeman@xxxxxxxx> wrote:
>>> Hi all,
>>> 
>>> Quick question: Does cephFS pass the fadvise DONTNEED flag and take it into
>>> account?
>>> I want to use the --drop-cache option of rsync 3.1.1 to not fill the cache
>>> when rsyncing to cephFS
>> It looks like ceph-fuse unfortunately does not. I'm not sure about the
>> kernel client though.
>> -Greg
> 

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