AW: Largest file system being synced

[Martin Bene]

Hi Jason,

 Are there any Linux users out there using the likes of 
 RAID'ed-NBD, CODA or
 Intermezzo for a similar effect?
 The NBD (network block device) looks interesting, it allows 
 you to mount a remote raw partition - so you can effectively 
 RAID over the network.


I'd recomend drbd over a nbd + raid solution: 
* drbd knows to read from local device only so performance is generaly better
* it deals nicely with disconnect / reconnect scenarios.

I've used drbd in real-life configurations with linux FailSafe and with
heartbeat as cluster managers, works quite nicely once you get it running.

Problems with drbd:
 * current version doesn't like SMP
 * works at block level, so speed for a full synchronisation depends on
filesystem size, not just used space.
 * resync speed limited to about 4MB/sec - limit aplies only for resync, not
for normal read/write access.

have a look at http://www.linbit.com/en/ for more information.

Bye, Martin

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AW: rsync raising an IO error for an excluded file

[Martin Bene]

Hi Martin,

   Shouldn't/couldn't the ignore silently if excluded be 
 specified less
   strictly to cover the above permission denied error as well?
  
  I think you're right.  Martin Pool, what do you think?  
 Martin Bene, could
  you please try coding and testing a patch that will do what 
 you want?
 
 Yes, that sounds reasonable to me.

OK, I'll send a patch.

Bye, Martin

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rsync raising an IO error for an excluded file

[Martin Bene]

Hi,

when syncing from windows NT/cygwin to linux usimg rsync 2.5.2 I get the following 
error:

readlink pagefile.sys: Permission denied
IO error encountered - skipping file deletion

pagefile.sys is however in the exclude-list, so I think rsync shouldn't care that it 
can't stat the file.

The code fragment responsible is

if (readlink_stat(fname, st, linkbuf) != 0) {
int save_errno = errno;
if ((errno == ENOENT)  copy_links  !noexcludes) {
/* symlink pointing nowhere, see if excluded */
memset((char *) st, 0, sizeof(st));
if (check_exclude_file(f, fname, st)) {
/* file is excluded anyway, ignore silently */
return NULL;
}
}
io_error = 1;
rprintf(FERROR, readlink %s: %s\n,
fname, strerror(save_errno));
return NULL;
}

Shouldn't/couldn't the ignore silently if excluded be specified less strictly to 
cover the above permission denied error as well?

Thanks, Martin

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rsync 2.5.1 on NT/cygwin: can't handle filenames with non-latin1 character set

[Martin Bene]

Hi,

2nd problem when using rsync on NT: rsync can't handle filenames with strange 
characters in the filename; no remote system needs to be involved here, happens even 
rsync between two local directories:

$ rsync -av /cygdrive/c/data/transfer/Marisa/ Marisa/
building file list ... readlink Imagelep. 10?1: No such file or directory
readlink Imagelep. 11?2: No such file or directory
readlink Imagelep. 9?1: No such file or directory
done
Marisa//
rsync: read error: Connection reset by peer
rsync error: error in rsync protocol data stream (code 12) at io.c(151)
wrote 84 bytes  read 20 bytes  208.00 bytes/sec
total size is 0  speedup is 0.00
rsync error: partial transfer (code 23) at main.c(537)

Those streange characters are mostly in files that have been created using a mac. I 
wouldn't mind some kind of name-mangling that removes these characters as long as the 
data in the files gets transfered correctly.

Any Idea how to work around this problem?

Thanks, Martin

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rsync 2.5.1 on NT/cygwin: transfer via ssh stalls

[Martin Bene]

Hi,

when trying to rsync a directory tree between linux and win2k via ssh, the transfer 
stalls after a few MB. using the same command line over rsh instead of ssh works. 

rsync -av -e ssh Administrator@mykw2server:/usr/ usr/

ssh version: 3.1p1 on both sides
rsync version 2.5.1 on both sides.

Any idea why this doesn't work?

Thanks, Martin

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