On 01/30/18 14:10, Terry Barnaby wrote: > > Thanks for the reply and trying. With your example its a bit different as you > are > creating the tar and compressing. The compression will take quite a lot of > CPU and > this is probably the bottleneck in your case. >
No, it isn't I used "tar -zcf lin.tar f27k/linux-4.14.15/" because you used "tar -xf linux-4.14.15.tar.gz". So, your procedure was un-compressing the archive. So, I was thinking it would generate a similar workload. Running tar -cf lin.tar f27k/linux-4.14.15/ produces similar results [egreshko@meimei ~]$ time tar -cf lin.tar f27k/linux-4.14.15/ real 1m56.593s user 0m0.762s sys 0m8.914s The above is reading from the server and writing on the client disk and doing no compression The below is reading the non-compressed tar on the client and writing to the server. [egreshko@meimei f27k]$ time tar -xf ~/Downloads/linux-4.14.15.tar real 1m52.371s user 0m0.806s sys 0m10.801s So, either direction the times are pretty much the same. > If I un-tar directly on the servers disks in question (SATA hard drives > software > RAID-1) the untar takes 13 seconds rather than the NFS 3 minutes ... > Of course running it on the same system will be *much* faster. -- A motto of mine is: When in doubt, try it out
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