[Linux-cachefs] cachefs and index keys

[Grant Street]

Just for completeness I am adding to this for future reference

This has stalled with redhat and I have had no correspondence on this 
from the cachefs team.

Because of the architecture of isilon it defeats the cachefs caching 
mechanism.

Grant


On 06/01/14 11:51, Grant Street wrote:
> Hi
>
> We are using EMC's Isilon storage as a NFS server consisting of over 50
> storage and networking nodes. It presents itself as one hostname eg
> isilon.sample.com and one very large directory tree, but dynamically
> resolves to multiple IP addresses. These IP addresses have the advantage
> of floating to different physical nodes in order to help balance the
> networking load when thousands of clients are connecting.
>
> The downside of this scheme is that currently cachefs would invalidate
> the cache if the IP address (resolved from isilon.sample.com) changes on
> reboot or automount expire and remount. This is because the cache key is
> based on the IP address rather than the fqdn.
>
> I have a case with redhat 00922150 and a bugzilla id 1018358. I was
> wondering what your thoughts would be on changing the cache key to a
> fqdn rather than an IP address?
>
> Unfortunately with the size of the isilon cluster we would not be able
> to do anything with traditional IP load balancers as the throughput and
> number of clients is too high.
>
> Thanks in advance.
>
> Grant
>