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<DIV><FONT color=#0000ff face=Verdana>Hi,</FONT></DIV>
<DIV><SPAN id=result_box lang=en><SPAN></SPAN></SPAN> </DIV>
<DIV><SPAN lang=en><FONT size=4><SPAN>Thanks!</SPAN></FONT></SPAN></DIV>
<DIV><SPAN lang=en><FONT size=4><SPAN>Very sorry</SPAN><SPAN>,</SPAN> <SPAN
class=hps>I did not</SPAN> <SPAN class=hps>carefully read the</SPAN> <SPAN
class=hps>RSYNC</SPAN> <SPAN class=hps>document</SPAN><SPAN>.</SPAN><SPAN>I have
just</SPAN> <SPAN class=hps>tested</SPAN><SPAN>,</SPAN> <SPAN
class=hps>RSYNC</SPAN> <SPAN class=hps>is</SPAN> <SPAN class=hps>really
only</SPAN> <SPAN class=hps>to</SPAN> <SPAN class=hps>send</SPAN> <SPAN
class=hps>the updated</SPAN> <SPAN class=hps>file
block</SPAN><SPAN>.</SPAN><BR><SPAN>very grateful to</SPAN> <SPAN class=hps>you
for</SPAN> <SPAN class=hps>help,</SPAN> <SPAN class=hps>and</SPAN> <SPAN
class=hps>this solves</SPAN> <SPAN class=hps>the</SPAN> <SPAN
class=hps>problem</SPAN> <SPAN class=hps>I wrote</SPAN> <SPAN class=hps>the
code</SPAN><SPAN>.(this is a happy thing<IMG
src="cid:__0@Foxmail.net">)</SPAN><BR><SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN lang=en><FONT size=4><SPAN>By the way</SPAN><SPAN>,</SPAN> <SPAN
class=hps>RSYNC</SPAN> <SPAN class=hps>command</SPAN> <SPAN
class=hps>parameters</SPAN> <SPAN class=hps>I</SPAN> <SPAN class=hps>use</SPAN>
<SPAN class=hps>the rsync </SPAN><SPAN class=atn>-</SPAN><SPAN>azh</SPAN>
,</FONT></SPAN></DIV>
<DIV><SPAN lang=en><FONT size=4>the -z is </FONT></SPAN></DIV>
<DIV><SPAN lang=en><FONT size=4>-z,
--compress
compress file data during the transfer</DIV></FONT></SPAN><FONT color=#0000ff
face=Verdana></FONT>
<DIV> </DIV>
<DIV>I think use this good.</DIV>
<DIV> </DIV>
<DIV><FONT size=4>and I not use ssh over rsync. ssh e<SPAN id=result_box lang=en
class=short_text><SPAN>ncrypted data</SPAN> <SPAN class=hps>packet</SPAN><SPAN>,
it will increase</SPAN> <SPAN class=hps>my traffic.</SPAN></SPAN></FONT></DIV>
<DIV> </DIV>
<DIV>Thanks!</DIV>
<DIV> </DIV>
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<HR style="WIDTH: 122px; HEIGHT: 2px" SIZE=2>
</FONT></DIV>
<DIV><FONT color=#c0c0c0><FONT size=2 face=Verdana></FONT></DIV>
<DIV><FONT size=2 face=Verdana>2012-07-18</FONT></DIV>
<DIV>
<DIV><FONT size=2>
<DIV><FONT size=2 face=Verdana><FONT size=2><SPAN style="FONT-SIZE: 10pt"
lang=EN-US><BR> </DIV></SPAN></FONT></FONT></FONT></DIV></DIV></FONT></DIV>
<DIV><FONT size=2 face=Verdana>
<HR>
</FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>发件人：</STRONG> Ryan
Kubica</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>发送时间：</STRONG>
2012-07-18 00:05:47</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>收件人：</STRONG> Simon Hobson;
rrd-users@lists.oetiker.ch</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>抄送：</STRONG> </FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2><STRONG>主题：</STRONG> Re: [rrd-users]
Incremental backup rrd file</FONT></FONT></DIV>
<DIV><FONT size=2 face=Verdana></FONT> </DIV>
<DIV><FONT size=2 face=Verdana>
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style="BACKGROUND-COLOR: #fff; FONT-FAMILY: arial, helvetica, sans-serif; COLOR: #000; FONT-SIZE: 10pt">
<DIV><SPAN><BR></SPAN></DIV>
<DIV>I'll second all of this about rsync: it's very efficient and 'safe' for rrd
data copies.</DIV>
<DIV><BR></DIV>
<DIV>I don't have backups per-se, I run active mirrored rrd servers with
millions of rrd datafiles per server and if one crashes where I need to rebuild
one or install a new one for hardware upgrade like I'm doing today, then I use
rsync to get a copy from another mirror ... actively. The
replacement-mirror writes behind in the rrd update queue so it's updating older
intervals than the rest of the cluster and then I copy from another mirror.
I'm currently copying 1TB (one terabyte) and it works beautifully.</DIV>
<DIV><BR></DIV>
<DIV>rsync would take a long time to do backups nightly of that many files
(which is why it's not done); but on a few thousand'ish it can(should!) be
used.</DIV>
<DIV><BR></DIV>
<DIV>If you use rsync over ssh, at least do something like this: rsync -ave 'ssh
-c blowfish' src dst</DIV>
<DIV><BR></DIV>
<DIV>I've yet to bother with rsync daemon with no ssh, though that'd be more
efficient as well.</DIV>
<DIV><BR></DIV>
<DIV>-Ryan</DIV>
<DIV><BR></DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Simon Hobson
<linux@thehobsons.co.uk><BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> rrd-users@lists.oetiker.ch <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tuesday, July 17, 2012 4:47
AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [rrd-users]
Incremental backup rrd file<BR></FONT></DIV><BR>Darren Murphy wrote:<BR>>Just
to add a little to this, the --stats & --human-readable
options<BR>>provide useful insight as to the efficiency of
rsync<BR><snip><BR>>So 3121 files totaling 4.3GB in size, and at least
90% of those files<BR>>would change between successive sync runs, yet only a
very small<BR>>amount of data needs to be transferred.<BR><BR>That tallies
with my experience. Obviously it varies considerably <BR>with the type of data,
but I've yet to find something where it <BR>doesn't show a reduction in data
transferred.<BR>In general, RRD files should 'compress' quite well (unless you
use <BR>very small consolidations).<BR><BR>>I'd also add that in my
experience rsync is incredibly robust and reliable.<BR>>I've been running an
hourly rsync from my main MRTG server to 3<BR>>separate "slaves" for almost 2
years now, and never once had a problem<BR>>with data integrity.<BR><BR>I'll
second that. And of course, even if the process dies part way <BR>through, you
can just run it again and it will catch up.<BR><BR>-- <BR>Simon
Hobson<BR><BR>Visit http://www.magpiesnestpublishing.co.uk/ for books by
acclaimed<BR>author Gladys Hobson. Novels - poetry - short stories - ideal
as<BR>Christmas stocking fillers. Some available as
e-books.<BR><BR>_______________________________________________<BR>rrd-users
mailing list<BR><A href="mailto:rrd-users@lists.oetiker.ch"
ymailto="mailto:rrd-users@lists.oetiker.ch">rrd-users@lists.oetiker.ch</A><BR><A
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