Timeout question

[Tim Conway]

You're looking at an NFS issue.  Rsync doesn't apply timeouts to 
filesystem access... it treats it like connection establishment.  If you 
were doing it over ssh, it wouldn't count the time for ssh to establish(or 
return an error) in the timeout time.  I can't say for certain on the 
rsync internal transport - my guess would be that timeout applies even to 
establishing the TCP session, there.
Once the stream is established, timeout counts.  I don't think it ever 
counts in a local->local transfer.
By the way, with NFS mounts, add the -W, as it's already going to have to 
read the whole file over the network, and might as well just read and 
write it in one step... or does it now reliably notice that a filesystem 
is NFS and force -W?  I hope not, as fast local NFS and slow WAN would 
probably still be better off using the rsync algorithm.

Tim Conway
Unix System Administration
Contractor - IBM Global Services
desk:3032734776
conway at us.ibm.com




"gianluca gattelli" <ggattelli at fsm.it> 
Sent by: rsync-bounces+conway=us.ibm.com at lists.samba.org
03/31/2004 05:34 AM

To
rsync at lists.samba.org
cc

Subject
Timeout question






Hi.

I've got 2 Fedora Linux (a Master and a Slave) with RSYNC-2.5.7. I need to 
keep Master synchronized 
  every 5 minutes (mounting a remote directory with NFS on Slave).

It runs correctly.

To simulate a problem, I try to disconnect the lan cable.

 From the shell of Slave:
rsync -a -v --timeout=10 --delete /mnt/master/ /local/slave

I expect that the process will end after 10 seconds, but it seems frozen.

Then, if I reconnect the lan cable, this message is shown:

rsync: writefd_unbuffered failed to write 424 bytes: phase "unknown":
Broken pipe
rsync error: error in rsync protocol data stream (code 12) at
io.c(515)

Why the "--timeout" option doesn't work in these conditions?

Thank you in advance.

Bye
G.
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