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Message #109528
[Bug 911529] Re: e4defrag doesn't make an optimized defragmentation
** Tags added: i386 precise
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https://bugs.launchpad.net/bugs/911529
Title:
e4defrag doesn't make an optimized defragmentation
Status in e2fsprogs package in Ubuntu:
Confirmed
Bug description:
I'm using Ubuntu 12.04 dev with e2fsprogs
1.42~WIP-2011-10-16-1ubuntu1. I wanted to defragment a big file (~9
GB) but sometimes e4defrag does nothing because it thinks the file is
optimized and a few seconds later it defragments the file and is
reducing the most times the extents of this file. Here is an example:
Command: e4defrag -v '/virtualbox/VirtualBox VMs/Ubuntu 32 Bit/Ubuntu 32 Bit.vdi'
Result: [1/1]/virtualbox/VirtualBox VMs/Ubuntu 32 Bit/Ubuntu 32 Bit.vdi: 100% extents: 71 -> 71 [ OK ]
The file was'nt defragmented and directly after this I used the same
command again and got:
[1/1]/virtualbox/VirtualBox VMs/Ubuntu 32 Bit/Ubuntu 32 Bit.vdi:
100% extents: 71 -> 69 [ OK ]
The file was now defragmented. I tried the command again:
[1/1]/virtualbox/VirtualBox VMs/Ubuntu 32 Bit/Ubuntu 32 Bit.vdi:
100% extents: 69 -> 69 [ OK ]
The file wasn't defragmented but on the next try:
[1/1]/virtualbox/VirtualBox VMs/Ubuntu 32 Bit/Ubuntu 32 Bit.vdi:
100% extents: 69 -> 68 [ OK ]
The file was defragmented and the behaviour on the last try was a
little different:
[1/1]/virtualbox/VirtualBox VMs/Ubuntu 32 Bit/Ubuntu 32 Bit.vdi:
100% extents: 68 -> 68 [ OK ]
The extents wasn't reduced but the file was defragmented which needed
some minutes. I don't know why e4defrag is sometimes defragmenting an
already previously defragmented file and sometimes not. And why aren't
the extents reduced to the minimum size possible on the first try?
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