Hi Trond, I'm testing these on two VMs with a single core each, so probably not the use case you had in mind for these patches. I ran my script that runs connectathon tests on every NFS version, and I'm seeing it consistently takes about a minute longer with "nconnect=2" than it does without the option. Thanks for working on this! Anna On 04/28/2017 01:25 PM, Trond Myklebust wrote: > In the spirit of experimentation, I've put together a set of patches > that implement setting up multiple TCP connections to the server. > The connections all go to the same server IP address, so do not > provide support for multiple IP addresses (which I believe is > something Andy Adamson is working on). > > The feature is only enabled for NFSv4.1 and NFSv4.2 for now; I don't > feel comfortable subjecting NFSv3/v4 replay caches to this > treatment yet. It relies on the mount option "nconnect" to specify > the number of connections to st up. So you can do something like > 'mount -t nfs -overs=4.1,nconnect=8 foo:/bar /mnt' > to set up 8 TCP connections to server 'foo'. > > Anyhow, feel free to test and give me feedback as to whether or not > this helps performance on your system. > > Trond Myklebust (5): > SUNRPC: Allow creation of RPC clients with multiple connections > NFS: Add a mount option to specify number of TCP connections to use > NFSv4: Allow multiple connections to NFSv4.x (x>0) servers > pNFS: Allow multiple connections to the DS > NFS: Display the "nconnect" mount option if it is set. > > fs/nfs/client.c | 2 ++ > fs/nfs/internal.h | 2 ++ > fs/nfs/nfs3client.c | 3 +++ > fs/nfs/nfs4client.c | 13 +++++++++++-- > fs/nfs/super.c | 12 ++++++++++++ > include/linux/nfs_fs_sb.h | 1 + > include/linux/sunrpc/clnt.h | 1 + > net/sunrpc/clnt.c | 17 ++++++++++++++++- > net/sunrpc/xprtmultipath.c | 3 +-- > 9 files changed, 49 insertions(+), 5 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
