#7073 closed defect (fixed)
Export two times slower and creates larger vmdk file (3.2.6 regression) => fixed in SVN
| Reported by: | Michael | Owned by: | |
|---|---|---|---|
| Component: | virtual disk | Version: | VirtualBox 3.2.6 |
| Keywords: | Cc: | ||
| Guest type: | Linux | Host type: | Linux |
Description
I was happily exporting a RHEL5 VM in about 40 minutes with a 876 meg VMDK file under VBox 3.2.4. After upgrading to 3.2.6 today, I wanted to see if the export would be faster. Boy was I surprised when it has taken well over an hour (approximately 1 hour and 10 minutes) and the VMDK file is 1.2 gigs in size to perform the exact same export operation. Please note I have not started the VM inbetween export attempts between the two VBox versions. I am exporting to a locally mounted file system (my root partition to be exact) so there is no network interference.
Host: Fedora 13 x86_64
Kernel: kernel-2.6.33.5-124.fc13.x86_64
Version: VirtualBox-3.2-3.2.6_63112_fedora13-1.x86_64
Host Filesystem: xfs
Change History (7)
comment:1 by , 15 years ago
| Component: | GUI → virtual disk |
|---|---|
| Summary: | Export two times slower and creates larger vmdk file → Export two times slower and creates larger vmdk file (3.2.6 regression) |
comment:2 by , 15 years ago
comment:3 by , 15 years ago
Guest Info:
RHEL 5.5
All defaults used during OS install.
File System: ext3
Only one drive is attached. 32 GB dynamic storage.
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
30G 2.3G 26G 9% /
/dev/sda1 487M 17M 445M 4% /boot
tmpfs 252M 0 252M 0% /dev/shm
Mostly OS files are installed. There is a small, user-space only, proprietary program installed (roughly 100 megs).
comment:4 by , 15 years ago
| Summary: | Export two times slower and creates larger vmdk file (3.2.6 regression) → Export two times slower and creates larger vmdk file (3.2.6 regression) => fixed in SVN |
|---|
This was fixed in svn and will be included in the next maintenance release. Thanks for the report and sorry for any inconveniences!
comment:5 by , 15 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
comment:6 by , 15 years ago
Just tried out 3.2.8. While it's not as bad as 3.2.6, it still took about 1 hour and the file size is 953MB. I guess this will do.
comment:7 by , 15 years ago
Just tried out 3.2.8 as well. Some notes about a completely untouched VM since 3.1.x:
Host: Mac OS X 10.6.4
Guest: Ubuntu Lucid 32-bit
3.1.8 export: 272 MB
3.2.6 export: 751 MB
3.2.8 export: 495 MB
So while there was an improvement, something is still amiss with the 3.2.x series and exporting.
Can you provide more details about the source disk image? What's its nominal capacity (see virtual media manager)? What's approximately in it? If it's an OS install, what OS? What kind of files are filling up the majority of the disk space used? What filesystem?
From your description it vaguely sounds as if VirtualBox incorrectly writes "more data" than it should, i.e. replaces zero data with non-zero data. That would explain why it takes longer and why the resulting image is bigger.