I know from a lot of NAS boxes that they tend to use their internal
time to stamp files instead of the time given by a copy job.
The easiest way to test is to deliberately set the time off by a few
hours on the box you monted the stuff on, the NAS and netapp (or the
Server accessing the netapp) and create a file from your mount
point, and check whether the time is right.
cifs isn't the fastest way in unix environments, and samba uses
_quite_ an amount of CPU power if you are above 50 MB/s.
If in any way possible you should do it more directly, having an
in-between box in the network causes (if -c is used) that all files
are read from both boxes over the network just for the checksum,
hence the bad performance.
These Netapps, are they "pure" storage and the server using them is
either windows or linux? If yes: Put rsync directly on those
servers. This also applies to most NAS boxes I know, they offer
rsync directly, most of the time as server.
Joachim
[email protected] schrieb:
Hey folks.
I have a machine that I use as an
intermediary
to rsync between a NAS in another building (the users there have
poor bandwidth
and need local storage) and the our Netapp located in our
Datacenter. I
get lots of the "rsync: failed to set times on..." errors, and
files which have already been transferred just try to sync again
anyway.
These are the mount options that
I use
for both sides:
mount -t cifs -o
credentials=/root/.synccreds
//nasdevice/folder /nas
mount -t cifs -o
credentials=/root/.synccreds
//netapp/folder /netapp
The ".synccreds" file has
the credentials of an Active Directory Domain Admin account,
which has
"Full Control" on both the NAS and the Netapp.
Here is the command that I run to
do
the rsync:
rsync -rvt --delete --progress
/nas/ /netapp/
Running rsync with "-i" shows
that the files are transferring because of timestamp
differences.
I tried the "-c" option in
place of the "-t", but the server doing the sync just hung there
for literally two days without anything transferring and no
output. I realize
that the -c option is slower, but yikes!
Any thoughts? Suggestions?
Thanks,
Bill D.
Bill Dorrian
Network Administrator
Desk: 904-273-7625
Cell: 904-859-9471
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