linux 3.2-3.7: enable NFS_FSCACHE and CIFS_FSCACHE #253
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NFS_FSCACHE and CIFS_FSCACHE are required to enable the local cache support for NFS and CIFS (the 'fsc' mount option). The reasoning for enabling it from 3.2 and forward is that at least Ubuntu 12.04 (linux 3.2) has it turned on. Could probably be enabled for earlier kernels too.
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So without this, nfs does zero local caching? |
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Not zero local caching, the nfs client still has its own cache (attributes etc). And the Linux VFS caches stuff. But the NFS_FSCACHE enables support for using the fsc option for nfs mounts, which makes the nfs client utilise the fscache module which in turn can utilise the cachefiles daemon to cache file data on a local backing device. So in addition to these kernel configs, you also need to load the fscache and cachefiles modules, and run the cachefilesd daemon. I have Nix expressions for both the cachefilesd program, and the required NixOS service, and I will commit them when I have done some more testing. |
viric
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Jan 27, 2013
linux 3.2-3.7: enable NFS_FSCACHE and CIFS_FSCACHE
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I guess some day I'll need it. |
Janik-Haag
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NFS_FSCACHE and CIFS_FSCACHE are required to enable the local cache support for
NFS and CIFS (the 'fsc' mount option). The reasoning for enabling it from 3.2
and forward is that at least Ubuntu 12.04 (linux 3.2) has it turned on. Could
probably be enabled for earlier kernels too.