rsync Digest, Vol 96, Issue 2

[the mett]

I THINK YOUR A VERY SAD BUNCH OF LIFES WAISTERS

On Wed, Dec 8, 2010 at 7:00 PM,  <rsync-request at lists.samba.org> wrote:
> Send rsync mailing list submissions to
>        rsync at lists.samba.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>        https://lists.samba.org/mailman/listinfo/rsync
> or, via email, send a message with subject or body 'help' to
>        rsync-request at lists.samba.org
>
> You can reach the person managing the list at
>        rsync-owner at lists.samba.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of rsync digest..."
>
> To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync
> Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
>
> ---------------------------------------
> Today's Topics:
>
>   1. DO NOT REPLY [Bug 7854] New: Abysmal sparse file performance
>      (samba-bugs at samba.org)
>   2. Re: Simple Question (Henri Shustak)
>
>
> ---------- Forwarded message ----------
> From: samba-bugs at samba.org
> To: rsync-qa at samba.org
> Date: Tue, 7 Dec 2010 21:09:47 -0600 (CST)
> Subject: DO NOT REPLY [Bug 7854] New: Abysmal sparse file performance
> https://bugzilla.samba.org/show_bug.cgi?id=7854
>
>           Summary: Abysmal sparse file performance
>           Product: rsync
>           Version: 3.0.7
>          Platform: x86
>        OS/Version: FreeBSD
>            Status: NEW
>          Severity: major
>          Priority: P3
>         Component: core
>        AssignedTo: wayned at samba.org
>        ReportedBy: grarpamp at gmail.com
>         QAContact: rsync-qa at samba.org
>
>
> I have a 5.5GB file, mostly sparse. Tar performs far[!] better than rsync.
> I have no ideas yet, so just an FYI as to current state.
> FreeBSD 8.1 i386 zfs
> Yes, I know the blocks used differs but don't know why yet, could
> be just how zfs does things or related to the large amount of sparseness.
> There are no media errors, CPU/IO load or anything like that and the source
> and dest paths are on the same filesystem.
> I've not tested times for files that are, say, 90% full instead of 90% sparse
> Though a 50% 35MB file was 8.5x slower than tar and had identical
> block counts and sha256 with both.
>
> /usr/bin/time rsync -HaxiS ./a ../
>>f+++++++++ a
>      271.13 real       101.44 user        95.62 sys
> ls -sl ./a ../a ; rm -f ../a
> blocks bytes
> 3625 5535932416 ./a
> 3769 5535932416 ../a
>
> /usr/bin/time tar -cf - ./a | /usr/bin/time tar -C .. -Sxf -
>       57.67 real         1.10 user        27.77 sys
>       57.67 real        10.68 user         5.87 sys
> ls -sl ./a ../a ; rm -f ../a
> blocks bytes
> 3625 5535932416 ./a
> 2977 5535932416 ../a
>
>
> --
> Configure bugmail: https://bugzilla.samba.org/userprefs.cgi?tab=email
> ------- You are receiving this mail because: -------
> You are the QA contact for the bug, or are watching the QA contact.
>
>
>
> ---------- Forwarded message ----------
> From: Henri Shustak <henri.shustak at gmail.com>
> To: rsync <rsync at lists.samba.org>
> Date: Wed, 8 Dec 2010 23:49:26 +1300
> Subject: Re: Simple Question
>> I have been using rsync on my laptop for some time to safeguard an
>> extensive image collection.
>> My usage has been: .. rsync -av --delete ~/Pictures /media/disk
>> I have found this exceptionally fast ... just as advertised!
>>
>> I now have set up a new computer system where I want to back up my /home
>> to a sata drive.
>> My phrase for this is: .. rsync -av --delete /home/david /media/Sata
>> Which appears to be identical to my earlier usage .. but .. rsync
>> appears to be totally rewriting the backup and instead of being able to
>> get a quick refresh, the backup is now taking an hour or more.
>>
>> Any idea what is going on?
>
>
> On which operating system are you executing rsync? If you are using Mac OS X, often permissions are ignored on non-boot drives by default.
>
> Information on enabling permissions is available from the following URL (Instructions at the following link are specific for Mac OS X systems) : <http://www.lbackup.org/permissions>
>
> This is just one possible reason you are having issues.
>
>
> ---------------------------------------------------------------------
> This email is protected by LBackup, an open source backup solution.
> http://www.lbackup.org
>
>
>
>
> _______________________________________
> Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
>
> rsync mailing list
> rsync at lists.samba.org
> https://lists.samba.org/mailman/listinfo/rsync
>
>



-- 
secure