On 01/29/18 15:47, Terry Barnaby wrote: > On 19/01/18 15:11, Terry Barnaby wrote: >> When doing a tar -xzf ... of a big source tar on an NFSv4 file system the time >> taken is huge. I am seeing an overall data rate of about 1 MByte per second across >> the network interface. >> >> If I copy a single large file I see a network data rate of about 110 MBytes/sec >> which is about the limit of the Gigabit Ethernet interface I am using. >> >> Now, in the past I have used the NFS "async" mount option to help with write speed >> (lots of small files in the case of an untar of a set of source files). >> >> However, this does not seem to speed this up in Fedora27 and also I don't see the >> "async" option listed when I run the "mount" command. When I use the "sync" option >> it does show up in the "mount" list. >> >> The question is, is the "async" option actually working with the NFS v4 in Fedora27 ? >> >> _______________________________________________ >> users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx >> To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > > Anyone using NFS these days ? Yes, but only as a client at the moment. > > Server is a Fedora27 as well. vers=4.2 the default. Same issue at other sites with > Fedora27. > > Server export: "/data *.kingnet(rw,async,fsid=17)" > > Client fstab: "king.kingnet:/data /data nfs async,nocto 0 0" > > Client mount: "king.kingnet:/data on /data type nfs4 > (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,nocto,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.202.2,local_lock=none,addr=192.168.202.1)" > > > If I have time (my) tomorrow I'll have a look at testing it. But, could you define what you mean by "big source tar" and "single large file"? In particular the "tar" procedure. I'm not sure if you have an nfs mounted file system and you are creating a tar from data on that file system, which would need to be read and then compressed locally and written back to the nfs mounted file system. So, I just want to get the data flow to match. And what is the size of the single large file and are you doing a copy from a local file system to the nfs partition? -- A motto of mine is: When in doubt, try it out
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