me again ... isn't there anybody that could give ANY hint on what's
wrong?
I did some test with dd and the result is terrible!
LVM
explendidos:/shared# dd if=/dev/zero of=test1.dd bs=64 count=1000
1000+0 records in
1000+0 records out
64000 bytes transferred in 20.019969 seconds (3197 bytes/sec)
NOT LVM
dd if=/dev/zero of=test1.dd bs=64 count=1000
1000+0 records in
1000+0 records out
64000 bytes transferred in 0.004496 seconds (14234595 bytes/sec)
I am searching and searching but can't find anywhere any answer :(
On Wed, Jun 28, 2006 at 11:24:27AM +0200, Cristian Livadaru wrote:
> I have built yesterday a 2.6.11 kernel with Xen.
> I wanted to move some old data to my LVM and the speed according to
> midnight commander was about 350kb/s ! about 2gig where copied in 4
> hours! I then rebooted with the original Debian Kernel 2.4.27-2-386 and
> the speed incresead to about 5mb/s that doesn't make me very happy
> either but was way better then 350kb!
> I have been searching the net all night and didn't come up with a
> solution. I have no clue what is wrong here.
> What did I do wrong and how can I increase the performance?
>
> The lvm is made out of 2x Seagate 300GB IDE HD not striped.
>
> esplendidos:~# lvm lvdisplay
> --- Logical volume ---
> LV Name /dev/share/sharevg
> VG Name share
> LV UUID KdvcJ9-ZLMP-AJYA-soGK-qHfy-UtrX-PpV9Kv
> LV Write Access read/write
> LV Status available
> # open 1
> LV Size 558.91 GB
> Current LE 143082
> Segments 2
> Allocation inherit
> Read ahead sectors 0
> Block device 254:0
>
> esplendidos:~# lvm dumpconfig
> devices {
> dir="/dev"
> scan="/dev"
> filter="r|/dev/cdrom|"
> cache="/etc/lvm/.cache"
> write_cache_state=1
> sysfs_scan=1
> md_component_detection=0
> }
> activation {
> missing_stripe_filler="/dev/ioerror"
> mirror_region_size=512
> reserved_stack=256
> reserved_memory=8192
> process_priority=-18
> }
> global {
> umask=63
> test=0
> activation=1
> proc="/proc"
> locking_type=1
> locking_dir="/var/lock/lvm"
> }
> shell {
> history_size=100
> }
> backup {
> backup=1
> backup_dir="/etc/lvm/backup"
> archive=1
> archive_dir="/etc/lvm/archive"
> retain_min=10
> retain_days=30
> }
> log {
> verbose=0
> syslog=1
> overwrite=0
> level=0
> indent=1
> command_names=0
> prefix=" "
> }
>
> any tip for performance tuning?
>
> --
> Cristian Livadaru
> http://vwclub.ro/
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
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