Asynchronous disk space monitoring

[Stephen John Smoogen]

On Wed, Oct 20, 2010 at 16:26, Orion Poplawski <orion at cora.nwra.com> wrote:
> On 10/20/2010 04:18 PM, Stephen John Smoogen wrote:
>> On Wed, Oct 20, 2010 at 15:52, Orion Poplawski<orion at cora.nwra.com>  wrote:
>>> Somewhat OT, but not sure where else to ask.  I'm looking into an issue where
>>> the nepomuk strigi service is preventing a desktop with an NFS mounted home
>>> directory from going into hibernate.  I think this is because it continually
>>> checks the available disk space in the home directory (about once every 20
>>> seconds in current 4.5.2, once every 10 seconds in 4.4.5).
>>
>> hibernate + network file systems has always been a rather tough nut .
>> NFS is built on the fact that multiple clients may have the same tree
>> open at the same time... so if you are going to hibernate you are
>> going to need to basicallly unmount because there is no guarentee that
>> anything underneath you will be there when you come out of
>> hibernation.
>
> Yeah, unfortunately unmounting causes other problems.  See
> https://bugzilla.redhat.com/show_bug.cgi?id=287411

Well yes... again it is the nature of NFS  for as long as I can
remember and something always brought up as why AFS was superior. If I
remember correctly (which is doubtful) NFS does not guarantee inode
consistency between mounts so if a mount goes away and comes back
open file descriptors are defined not to work. I believe NFSv4 in a
clustered environment works differently but in the case where the
client unmounts the partition and there are still open file
descriptors.. its the clients problem. [Not sure if NFSv4 worked out
local caching to 'fix' this.]

>
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> Orion Poplawski
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Stephen J Smoogen.
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