RSYNC Hung

[Troy Haines]

Hi all,

 

RSYNC Server: CENT OS 5 RSYNC Version: 2.6.8, Running RSYNC Daemon.

 

Client: Windows 2003 Standard, Delta Copy running rsync.exe version
2.6.6

 

We are backing up 2 files at each site at a total of 3 sites. 1 site is
running perfectly, whilst the other 2 are causing constant grief. The
backups at these 2 sites are hanging during the RSYNC process at random
places. One of the two files cause the hang. We are running the
following command on the client to initiate the backup: 

 

rsync.exe  -v -rlt -z --delete
"/cygdrive/D/MT32/ddiBkRes/Backup/PHCCAMMT32.GBK"
"192.168.X.X::rsync//PHCCAMMT32.GBK"

 

When it hangs, If I kill the rsync process on the client it will attempt
the backup again. Usually a few retries and it will go through
successfully. The RSYNC client log just states "Syntax or usage
errorRsync.exe returned an error. Will try again. This is retry number 1
of 5"

 

On the server, I have ran strace on the 2 rsync daemon processes and
getting the following output after killing the rsync process on the
client.

 

[root at testlinux ~]# strace -c -T -p 4088
Process 4088 attached - interrupt to quit
Process 4088 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 68.70    0.004287         179        24           select
 16.27    0.001015          85        12        12 open
  6.44    0.000402         101         4           send
  4.36    0.000272          54         5           read
  3.48    0.000217          54         4           time
  0.75    0.000047          24         2         1 waitpid
  0.00    0.000000           0         1         1 kill
  0.00    0.000000           0         1           sigreturn
  0.00    0.000000           0         2           rt_sigaction
------ ----------- ----------- --------- --------- ----------------
100.00    0.006240                    55        14 total
[root at testlinux ~]#

 

 

[root at testlinux ~]# strace -c -T -p 4089
Process 4089 attached - interrupt to quit
Process 4089 detached
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
 58.36   15.742245         690     22815         1 read
 40.37   10.888016         871     12501           write
  1.25    0.337640         217      1558           select
  0.02    0.005026          77        65           _llseek
  0.00    0.000275         138         2           rt_sigaction
------ ----------- ----------- --------- --------- ----------------
100.00   26.973202                 36941         1 total
[root at testlinux ~]#
[root at testlinux ~]#

 

 

These logs don't make much sense to me as my Linux skills are limited.
For further troubleshooting I was thinking of trying the backups without
compression and using CYGWIN in conjunction with the newest version of
RSYNC.

 

Any Help would be great.

 

Troy

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