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...the standard ones that happen with a fresh install. Does anyone know if this performance degradation is normal? If not, does anyone have hints on what I should do to track down the problem. Thanks. Ray ----------The log of my runs is shown below------------ # time dd if=big2 of=/dev/null bs=1024k 2201+1 records in 2201+1 records out real 23.8 user 0.0 sys 11.1 # time dd if=big2 of=/dev/null bs=1024k 2201+1 records in 2201+1 records out real 24.5 user 0.0 sys 8.9 # time dd if=big2 of=/dev/null bs=1024k 2201+1 records in 2201+1 records out real...

Hi. I need more space on my domU server, so i create a file image to attach it to the domU. But when i load that image in the domU, show a size very different to the create. I create the file with this command dd if=/dev/zero of=/xen/domains/SRV03/opt-disk.img bs=1024k seek=30720 count=30720 (The idea is create an image disk with 30GB, but when i check the disk on the domU show 64GB.) attach the image to the domU xm block-attach SRV03 tap:aio:/xen/domains/SRV03/opt-disk.img sdb1 w so i access to domU and create the filesystem. mkfs.ext3 /dev/sdb1 but when...

...r status Name Status Components mirror/root COMPLETE ada0p2 (ACTIVE) ada1p2 (ACTIVE) mirror/data COMPLETE ada0p4 (ACTIVE) ada1p4 (ACTIVE) mirror/root is mounted as the root fs (UFS2). Doing write: $ time dd if=/dev/zero of=/IMAGE bs=1024k count=`expr 4 \* 1024` 4096+0 records in 4096+0 records out 4294967296 bytes transferred in 29.326044 secs (146455733 bytes/sec) Doing read: $ time dd if=/IMAGE of=/dev/null bs=1024k count=`expr 4 \* 1024` 4096+0 records in 4096+0 records out 4294967296 bytes transferred in 48.821649 secs (879725...

Greetings -- I have a DOS .exe file that I would like to run in Wine (the underlying Windows is Win2K); it gives the error "Needs 1024K of expanded memory." I have a PIF file which supposedly sets up this memory environment, but .PIF files cannot be loaded by Wine. Possible solutions: * Make wine make the .exe think there is 1024K of expanded memory. * Make wine run the .pif file using something like WinExec, thereby worki...

...6 (order: 7, 524288 bytes) >> > Memory: 509440k/524288k available (1921k kernel code, 14336k reserved, >> > 639k data >> > , 136k init) >> > Mount-cache hash table entries: 256 >> > CPU: Trace cache: 12K uops, L1 D cache: 16K >> > CPU: L2 cache: 1024K >> > CPU: Physical Processor ID: 3 >> > Booting processor 1/1 rip ffffffff80100008 rsp ffff880000655f58 >> > Initializing CPU#1 >> > CPU: Trace cache: 12K uops, L1 D cache: 16K >> > CPU: L2 cache: 1024K >> > CPU: Physical Processor ID: 0 >&gt...

...real 0m26.150s user 0m1.424s sys 0m0.868s user1@pris:~$ sudo apt-get install apache2 -y Results: real 6m42.202s user 0m2.052s sys 0m1.768s I have tried to do this test drive, but the results are the same. It seems it has to do with the execution: user1@deckard:~$ time dd if=/dev/zero of=./test bs=1024k count=5120 conv=fsync 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 122.405 s, 43.9 MB/s real 2m2.408s user 0m0.000s sys 0m6.968s user1@pris:~$ time dd if=/dev/zero of=./test bs=1024k count=5120 conv=fsync 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copi...

...all I''d like to thank everyone for making Xen so user friendly. I thought I''d be sweating through this but it''s been pretty straight forward (thanks to all the different tutorials on the net). I''ve got a domU that I created with dd if=/dev/zero of=vm_base.img bs=1024k count=4000 mkfs.ext3 vm_base.img dd if=/dev/zero of=vm_base-swap.img bs=1024k count=1000 mkswap vm_base-swap.img mount -o loop vm_base.img /mnt debootstrap etch /mnt this has worked fine and I''m happily continuing with the installation But. I have a performance question. For example. vi...

I'm running rsync via ssh on two machines connected with 100 Mbit/s Ethernet cards (at high speed) via a Linksys switch. It's all right here in a single closet. I'm sending large files (initial transfer, nothing preexists on the destination machine) and seeing transfer rates in the 2 Mbit/s range. The CPUs on both machines are more than 90% idle, and I upped the --block-size to 256

...fault I'm about to talk about is evident on other block sizes and controllers as well. I have a little script that makes a bunch of large files to give the filesystem a beating. It goes like this: #!/bin/bash i=1000 for((i=0;i != 301;i++)); do time -p dd if=/dev/zero of=./bigfile.$i bs=1024k count=1024 echo $i done About 4 files in, it dies with 'dd: writing `./bigfile.4': Read-only file system' In the messages file, I see: Mar 27 17:28:15 r5 kernel: journal_bmap: journal block not found at offset 1607 on sd(8,17) Mar 27 17:28:15 r5 kernel: Aborting journal on devic...

...ode: Flat. Using 3 I/O APICs (XEN) Using ACPI (MADT) for SMP configuration information (XEN) Initializing CPU#0 (XEN) Detected 1993.586 MHz processor. (XEN) Using scheduler: Simple EDF Scheduler (sedf) (XEN) CPU: Trace cache: 12K uops, L1 D cache: 8K (XEN) CPU: L2 cache: 512K (XEN) CPU: L3 cache: 1024K (XEN) CPU: Hyper-Threading is disabled (XEN) CPU0: Intel(R) Xeon(TM) MP CPU 2.00GHz stepping 05 (XEN) Booting processor 1/1 eip 90000 (XEN) Initializing CPU#1 (XEN) CPU: Trace cache: 12K uops, L1 D cache: 8K (XEN) CPU: L2 cache: 512K (XEN) CPU: L3 cache: 1024K (XEN) CPU: Hyper-Threading is disabled...

Hi all, I mounted by smbmount a partition on a winNT machine without problem... but when i tried to copy a file whitch have size more than 2 Gb i have the following error : Overflow size allowed for a file (translated from french ;-) :D?bordement de la taille permise pour un fichier ) PS. the file system of the harde drive is NTFS PS. The command of smbmount : /usr/sbin/smbmount

...6k init) Calibrating delay using timer specific routine.. 4805.50 BogoMIPS (lpj=9611004) Security Framework v1.0.0 initialized SELinux: Disabled at boot. Capability LSM initialized Mount-cache hash table entries: 256 CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) CPU: L2 Cache: 1024K (64 bytes/line) CPU 0/0 -> Node 0 CPU: Physical Processor ID: 0 CPU: Processor Core ID: 0 SMP alternatives: switching to UP code ACPI: Core revision 20060707 Using local APIC timer interrupts. result 12502362 Detected 12.502 MHz APIC timer. SMP alternatives: switching to SMP code Booting process...

Hi. I want use xen with dynamic slices. For example, I have 20 domU based on FreeBSD, xen hypervisor 3.3.1, Debian Lenny dom0 system. All domUs have 80Gb LVM partitions, but realy they use 20 of this 80Gb and I want to create more domU''s. How can I do it? I know that some virtualisation have possibility to do dynamic slices(4 example Virtul box) -- Best Regards, alex.faq8@gmail.com

Hi list, We've had an interesting NFS performance issue with the following setup. Clients : CentOS 5.5, kernel 2.6.18-194.el5 Server : Solaris 10 kernel Generic_142901-08 Reading a file (not cached) with dd : dd if=file1 of=/dev/null bs=1024k count=100 performance is around.. 700 kB/s ! /proc/mounts shows rsize has been negotiated to 1mB If we force rsize to a smaller value, 32kB, the problem goes away and we're back around 70/80 mB/s read performance. Wiresharks show something interesting in the first (slow) case: It seems that...

OS= CentOS 5.4, 64bit. I've always had great luck using dd to copy entire disks, and booting on other systems.? However, I'm having difficulty with a couple systems.? I boot using an install DVD so the OS disk is quiet, and dd to my target disk: # dd if=/dev/sda of=/dev/sdb bs=1024k /dev/sdb is the blank disk.? The disks are 2T.? After a few hours the operation is complete.? But when I try to boot the new disk on my other system, I get the following errors after the CentOS boot menu (it counts down to boot the default disk fine, then this error): ? (screen shot at?? http://i...

...sian modelling (geoR) it stops at 1,096K and i get memory errors because it cannot allocate a new segment of about 500K of memory. I don't have Visual Basic so i cannot use the other commands suggested in Help. Also, if i am using memory.size(max=TRUE) i get a value corresponding to about 1024K, and if i am using memory.limit(size=NA) i get a value of about 4000K. How can i force R to use more memory? thank you for any suggestion, Monica Monica Palaseanu-Lovejoy University of Manchester School of Geography Mansfield Cooper Bld. 3.21 Oxford Road Manchester M13 9PL England, UK Tel: +44...

Hi, I''m a newbie in VM/Xen. As a first step to do some study/experiment on VM, I want to install Ubutnu (10.04) as DomU on top of Ubutu (10.04) Dom0. I need some direction to stat with: - how to install the DomU image - how to configure the network address I''d be greatly thankful to you for providing some useful link to this end. Thank you in advance. Regards, -shopno

...ystem works fine, too: (1) Running a ''find . -type f -print'' on a directory with a total of 46450 files/subdirectories in it takes about 90 seconds, yielding an average I/O size of 64 at around 2000 kr/s according to iostat(1M). (2) Running a ''dd if=/dev/zero of=blah bs=1024k count=128'' takes about 18 seconds at almost 7MB/s (this is a 10/100 network). To compare how this measures up when not doing any file I/O, I ran ''dd if=/dev/zero bs=1024k count=128 | ssh remotehost "cat - >/dev/null"'', which took about 13 seconds. (3) Readi...

...o zero out the partition table first so you don't "inherit" any > badness ("dd if=/dev/zero of=/dev/sdx bs=512 count=1 conv=sync"). > Actually before destroying the partition table, I'd zero out the > beginning of all and any partitions ("dd if=/dev/zero bs=1024k > count=10 conv=sync of=/dev/sdxX" x Y) first, as we are in starting > from scratch mode. (If there were RAID/GPT involved I'd zero out > the end of partitions/disk respectively too.) . CPU reading a memory location is not like human reading from paper. <zero> bytes are no m...

...ve else - blockdev --rereadpt $drive + blockdev --rereadpt "$drive" fi } @@ -617,19 +617,19 @@ perform_partitioning() log "Partitioning drive: $BOOTDRIVE" log "Wiping old boot sector" dd if=/dev/zero of=$BOOTDRIVE bs=1024K count=1 - reread_partitions $BOOTDRIVE - partprobe -s $BOOTDRIVE + reread_partitions "$BOOTDRIVE" + partprobe -s "$BOOTDRIVE" log "Creating boot partition" - parted $BOOTDRIVE -s "mklabel ${LABEL_TYPE}" - par...