[CentOS] Persistent NFS Caching

James Pearson james-p at moving-picture.com
Wed Dec 2 14:08:40 UTC 2009


Ray Van Dolson wrote:
> On Tue, Dec 01, 2009 at 05:09:31PM -0600, Paul Berger wrote:
> 
>>Has anybody got persistent NFS caching to work after 5.3 update
>>removed the tech preview?
>>
>>I have cachesfilesd installed & running and using nfs-utils with fsc
>>patched back in but it appears to not be working, any pointers?
> 
> I can't find the link, but I thought the kernel components required for
> FS-Cache to function were pulled in the 5.3 kernel... 

<https://bugzilla.redhat.com/show_bug.cgi?id=481579>

> I'm not sure if they'll be back in 5.5, 6.0 or if I'm completely
> mistaken.
> 
> I seem to recall the delay being a result of upstream kernel not
> accepting the FS-Cache patches (which I believe they did do recently in
> 2.6.30).

The kernel patches that were in the earlier 5.x kernels are now a bit 
out-of-date and IMHO not really suitable for production use.

There has recently been a number of new FS-Cache patches/improvements 
that will be in the 2.6.32 mainline kernel

I doubt FS-Cache will be back in future 5.x kernels - my guess is that 
it will be in the 6.x kernels

James Pearson


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