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Automating database maintenance with Mythwelcome shutdown
http://forums.linhes.org/viewtopic.php?f=6&t=19794
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Author:  alien [ Fri Apr 29, 2011 1:32 am ]
Post subject: 

Cool script.

One suggestion. You might want to instead use the -a (archive) option to rsync. That preserves ower, group, permissions, links (and a few others) as well as timestamp. You can also do multiple directories at once. Ex:
Code:
rsync -va --delete /myth/video /myth/music /myth/gallery /myth2/media-backup/

...Saves having to fix permissions/ownership if you have to restore...

Allen

Author:  nicom [ Sun May 01, 2011 8:51 pm ]
Post subject: 

Thanks, that's a good suggestion.

Author:  turpie [ Wed Dec 07, 2011 12:03 am ]
Post subject: 

Hi,
I'm trying to get this setup on my machine now that I have a drive using XFS.
I've modified the script to script to skip the defrag of /myth (as it's running ext3) and change the /myth2 partition to /dev/sda1. But I'm not sure what the -m option is for and why it uses an alternative mtab file?

echo `sudo xfs_fsr -v -t 1200 -m /home/mythtv/sd-maint/mtab_sdb1`
What should I do with this line?


Also while I still have space on /myth2 should I convert /myth to xfs as well?
Code:
/dev/sdb3                                               925G  898G   28G  98% /myth
/dev/sda1                                               1.9T  254G  1.6T  14% /myth2

Author:  nicom [ Sun Dec 11, 2011 9:02 pm ]
Post subject: 

Paul,

Sorry for the delay getting back to you but I have been out of the country.

The -m option allows me to defrag one partition at a time. The referenced file is just like the entry you would see in the /etc/mtab file for the partition in question, so for me
Code:
$ cat sd-maint/mtab_sdb1
/dev/sdb1 /myth2 xfs rw,noatime,allocsize=512m 0 0
Likewise a similar file for the other partition.

If you only intend to leave it as one xfs partition, you do not need to bother about the -m option because xfs_fsr defaults to /etc/mtab so it will look for any xfs partition and defrag it (even if there is more than one). I originally did not use the option and I found that the second partition listed did not get get a good defragging so I added the option and now they happen on different shutdowns.

As for whether to convert your /myth partition to xfs, my main reason was to avoid the partition checking at start-up after 30 boots delaying the start of the machine for up to 10 minutes for a similar size drive to yours. If that is not a concern then ext3 would be fine although conversion would be tempting while you have all that room in /myth2.

Perhaps others can comment on relative merits of the file systems.

Richard

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