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 ?
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Anyone using NFS these days ?
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)"
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