Le 14/10/2012 18:01, Frederic MASSOT a écrit :
> Le 08/10/2012 13:47, Carl Wilhelm Soderstrom a écrit :
>  > On 10/08 11:07 , Frédéric Massot wrote:
>  >> After moving the BackupPC data on the new logical volume and thus the
>  >> new file system, the old logical volume will no longer be used. I could
>  >> delete it but how I could use this free space?
>  >
>  > Expand your new volume and filesystem to use it.
>  > Are you using LVM, or just plain partitions?
>
> Yes, I use LVM on MD.
>
> I thought I would increase the size of the new file system, but my
> concern is not having the same problem with a lack of inode in a few years.
>
>  From what I've read, if I chose XFS instead of ext4, I would not have
> this problem of lack of inode.
>
>  >> Does with XFS the inode number increases with increasing file system
> size?
>  >
>  > XFS doesn't really have a problem with inodes.
>  >
>  >> Some people use XFS on Debian without problem?
>  >
>  > I've used it for some years. If you do use XFS, make sure you have
> enough
>  > space in RAM+swap to accomodate the xfs_check tool, which is notoriously
>  > memory-hungry. My suggested filesystem layout is something like:

Hi,

I replaced one by one the four 500 GB hards disks with 1 TB hards disks. 
I increase the size of the partitions, the RAID10 array, physical volume 
and then the volume group.

I created a logical volume formatted in XFS, it is mounted in a 
temporary directory "/mnt/backuppc-new".

I started copying Backuppc data from "/var/lib/backuppc" (ext4) to the 
temporary directory "/mnt/backuppc-new" (xfs) with the command "cp -a".

The first 200 GB have been copied in about 12 hours. I felt that copying 
616 GB would take between 36 to 40 hours.

But now it is very slow, the speed is closer to 1 GB in 12 hours, or 
more. It remains to be copied 200 GB, I can not wait 100 days!

Copy of "cpool" and "log" was performed, the slowness comes from the 
copy of "pc" and certainly hardlinks.


- Is that the copy will still be slow, it will get worse and worse?

- Is that rsync is faster than cp to copy data with hardlinks?


Regards.
-- 
==============================================
|              FRÉDÉRIC MASSOT               |
|     http://www.juliana-multimedia.com      |
|   mailto:frederic AT juliana-multimedia DOT com   |
| +33.(0)2.97.54.77.94  +33.(0)6.67.19.95.69 |
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