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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I presently backup 1Tb of files via rsync cron job. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>/usr/bin/time /usr/bin/rsync -a --delete /from/dir/ /destination/dir<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
bblisa-bounces@bblisa.org [mailto:bblisa-bounces@bblisa.org] <b>On Behalf Of </b>Richard
'Doc' Kinne<br>
<b>Sent:</b> Thursday, January 08, 2009 4:07 PM<br>
<b>To:</b> bblisa@bblisa.org<br>
<b>Subject:</b> [BBLISA] System Backup thoughts and questions...<o:p></o:p></span></p>
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<p class=MsoNormal>Hi Folks:<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>I'm looking at backups - simple backups right now.<o:p></o:p></p>
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<p class=MsoNormal>We have a strategy where an old computer is mounted with a
large external, removable hard drive. Directories - large directories - that we
have on our other production servers are mounted on this small computer via
NFS. A cron job then does a simple "cp" from the NFS mounted
production drive partitions to to the large, external, removable hard drive.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>I thought it was an elegant solution, myself, except for one
small, niggling detail.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>It doesn't work.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>The process doesn't copy all the files. Oh, we're not having
a problem with file locks, no. When you do a "du -sh
<directory>" comparison between the /scsi/web directory on the
backup drive and the production /scsi/web directory the differences measure in
the GB. For example my production /scsi partition has 62GB on it. The most
recently done backup has 42GB on it!<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>What our research found is that the cp command apparently
has a limit of copying 250,000 inodes. I have image directories on the
webserver that have 114,000 files so this is the limit I think I'm running
into.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>While I'm looking at solutions like Bacula and Amanda, etc.,
I'm wondering if RSYNCing the files may work. Or will I run into the same
limitation?<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Any thoughts?<o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";
color:black'>---<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";
color:black'>Richard 'Doc' Kinne, [KQR]<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";
color:black'>American Association of Variable Star Observers<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";
color:black'><rkinne @ aavso.org><o:p></o:p></span></p>
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