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On 06/12/12 10:08, Marc Rechté wrote: > Eric, > > How would you know (debug) that size+time compare fails in a rsync > session ? > > Thanks Marc > > Le 12/06/2012 15:39, ericbamba...@discover.com a écrit : >> Alan, >> >> What is the rsync command used? If it hits a large group of >> files with no differences (easy to believe across 12TB) but has >> to compare the checksums anyways (forced by you or failing the >> size+time compare) you'll be I/O bound with almost no >> corresponding network traffic as it just has to send the >> checksums. >> >> >> Eric Bambach | Discover Senior Assoc. Programmer, Warehouse >> Infrastructure and Tools 2500 Lake Cook Road, Riverwoods IL >> 60015 P: 224.405.2896 ericbamba...@discover.com >> >> >> >> >> From: Alan McKay<alan.mckay+rs...@gmail.com> >> To:<rsync@lists.samba.org> Date: 06/12/2012 08:30 AM Subject: >> rsync takes long pauses in xfer ? Sent >> by:<rsync-boun...@lists.samba.org> >> >> >> >> Hey folks, >> >> I did some googling on this but did not come up with much. I'm >> using rsnapshot which uses rsync, and I notice some pretty long >> pauses in the xfers as you can see on this graph from "munin". >> THe machine in question right at the moment is doing nothing but >> rsyncing ( rsnapshoting ) some 12T of NAS storage to local disk, >> so there is nothing else going on at all. >> >> https://plus.google.com/u/0/photos/113518077816006248932/albums/5732421463318682369/5753139625064539250 >> >> >> >> >> You can see a couple of spots in the graph where it just drops to >> nothing ( checking more closely you do see a very small bit of >> activity ) >> >> Here is another graph from MRTG which records the traffic from >> the switch port side. You can see around 2am it drops off pretty >> low, then from about 4am til about 7am it drops even lower. >> >> https://plus.google.com/u/0/photos/113518077816006248932/albums/5732421463318682369/5753140504922328322 >> >> >> >> >> Is that normal? Or is this something I should ask on the rsnapshot >> list (if there is one)? >> >> I did find something in google about depending on the types of >> files it can change xfer rate but not much detail. >> >> thanks, -Alan > - -- ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~ Kevin Korb Phone: (407) 252-6853 Systems Administrator Internet: FutureQuest, Inc. ke...@futurequest.net (work) Orlando, Florida k...@sanitarium.net (personal) Web page: http://www.sanitarium.net/ PGP public key available on web site. ~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk/XTaoACgkQVKC1jlbQAQdZmQCg1WfB4HHJ0frAv5/yI0Q+vp7J y9QAoMe+HNg14Lsb/m9/3b0RTz9BLzji =8SVj -----END PGP SIGNATURE----- -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
