similar to: Xen 3.0.3 disk i/o

I'm trying to resolve an I/O problem on a CentOS 5.6 server. The process basically scans through Maildirs, checking for space usage and quota. Because there are hundred odd user folders and several 10s of thousands of small files, this sends the I/O wait % way high. The server hits a very high load level and stops responding to other requests until the crawl is done. I am wondering if I add

Hi list ! We have a very busy webserver hosted in a clustered environment where the document root and data is on a GFS2 partition off a fiber-attached disk array. Now on busy moments, I can see in htop, nmon that there is a fair percentage of cpu that is waiting for I/O. In nmon, I can spot that the most busy block device correspond to our gfs2 partition where many times, it shows that

Hello everyone. I'm wondering what other people's experiences are WRT systems becoming unresponsive (unable to ssh in, etc) for brief periods of time when a large amount of IO is being performed. It's really starting to cause a problem for us. We're on Dell PowerEdge 1955 blades - but this same issue has caused us problems on PE1950, PE1850, PE1750 servers. We're running

Hi, I'm building a test asterisk server and building the latest kernel I got to wonder if there are any specific recommendations about schedulers and so forth for optimum performance. There are a few areas that raise questions in my mind and I wonder if anyone has any opinions/comments on which settings are most suitable for use with asterisk: SLAB Allocator (SLAB or SLUB?) Tickless

Hi Xen-users, I am trying to boot of my fist guest domain. The below attached message was thrown on the screen. I am not quite sure that the below information is sufficient to root cause the issue. Where do i look for additional logs to root cause the issue. Appreciate any info that you think might be useful. Thanks, Karthik xm create -c guest1.conf vmid=2 Using config file

Is there a way to nice the IO on a process such as dd? If not, what could be a way to control the IO level of such a process from bogging down a server to severely. Thanks, jlc

Hi all- I''m hoping someone can help me with this problem with Xen under CentOS 5.1 (RHEL 5.1) I''m having... This is the Xen package that comes stock with the distribution, I didn''t compile it from source. I can boot Domain0 and the hypervisor just fine. I''m trying to bring up a Xen guest VM and it crashes on boot, with this error: # xm create -c tcga1

Hello, i will describe my approach 1) I have downloaded Centos5-64bit xen image from jailtime.org 2) I have created own swap image with 512MB file size 3) I have used same as dom0 kernel 2.6.18-53.1.19.el5xen 4) I have mounted my image file and copied /lib/modules/2.6.18-53.1.19.el5xen 5) I have created custom ramdisk for domU with mkinitrd --with=xennet --preload=xenblk

During boot of dom0, I get the following. Box is remote, so I''m now waiting for proxy power button pusher ;-) tg3 init fails doing dma_alloc_coherent (I assume this is from tg3_init_one -> tg3_test_dma -> pci_alloc_consistent -> dma_alloc_coherent). Looks like an issue with the amount of memory in dom0. Is this known? thanks, -chris root (hd0,0) Filesystem type is ext2fs,

This patchset expands traditional CFQ scheduler in order to support cgroups, and improves old version. Improvements are as following. * Modularizing our new CFQ scheduler. The expanded CFQ scheduler is registered/unregistered as new I/O elevator scheduler called "cfq-cgroups". By this, the traditional CFQ scheduler, which does not handle cgroups, and our new CFQ

This patchset expands traditional CFQ scheduler in order to support cgroups, and improves old version. Improvements are as following. * Modularizing our new CFQ scheduler. The expanded CFQ scheduler is registered/unregistered as new I/O elevator scheduler called "cfq-cgroups". By this, the traditional CFQ scheduler, which does not handle cgroups, and our new CFQ

i saw a screen shot of knoppix beeing run under xen but for some reason i can''t do that. here if the config file i use. > kernel = "/boot/vmlinuz-2.6-xenU" > memory = 64 > name = "ttylinux" > nics = 1 > ip = "1.2.3.4" > disk = [''phy:hdc,hdd,r''] > root = "/dev/hdd ro" hdc is my cdrom and it was unmounted at

We have found a critical problem with the XEN 3.1 release (for those who are running 15-20 VMs on a single server). We are using the official XEN 3.1 release on a rackable server (Dual-Core AMD Opteron, 8GB RAM). The problem we are seeing is that intermittently vifs fail to work properly in VMs after we create around 15-17 VMs on our server (all running at the same time, created one by

Hello, I am trying to boot a FC6 domU on Xen 3.2 (compiled on a FC6 system). After compiling Xen 3.2 successfully on FC6 and making the ramdisk, I modified the conf.grub as shown below. With this, I was able to boot xen. ------------------------------ --------------------------------------------------------------------------------- # grub.conf generated by anaconda # # Note that you do not have

Hi all, Currently we have severe problem and are struggling to investigate it. The problem is data broken. Reproduce pocess is following, 0. test FTP function between guest domain and FTP client(other PC). 1. put data from FTP client to guest domain. 2. get data from guest domain to FTP client. 3. compare put data and get data on FTP client. 4. repeat process from step1 to step3.

Hi, Updated to current bk today, and my machine stopped booting ... I''ve tracked it down to the apic changes from end of last week. cset 1.1307 boots fine, 1.1308 doesn''t. Diff of the boot messages is below. Full logs are also attached. Gerd --- log-1.1307 2005-04-21 14:40:57.372885027 +0200 +++ log-1.1308 2005-04-21 14:38:52.236553392 +0200 @@ -7,7 +7,7 @@

Hello, I found a strange problem with allocationg big files on drive. For example in guestfish I allocate large disk image for example: $ guestfish ><fs> allocate test.img 20G When an image allocating, there is a big slowdown of guest OSes, launched on host machine, and on different drives. For Linux guests with virtio drivers, there is no so big performance penalty, but for FreeBSD

Hello, I found a strange problem with allocationg big files on drive. For example in guestfish I allocate large disk image for example: $ guestfish ><fs> allocate test.img 20G When an image allocating, there is a big slowdown of guest OSes, launched on host machine, and on different drives. For Linux guests with virtio drivers, there is no so big performance penalty, but for FreeBSD

Xentop encounters error in pv-ops domain0, because the VBD path in sysfs changes to "/sys/devices" Also delete the macro in xenstat_netbsd.c, because it is not used. Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com> Best Regards, -- Dongxiao _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi all, I can''t find any good talk about this subject and would like some insights and advices on the cache side in xen. I discovered that a domO power outage can lead to a severe filesystem corruption of the domUs. The domO is a dual disk dell server with a PERC controler in writethrough cache mode, the disk cache is disabled, the scheduler in the domO/domU is NOOP, the domO is holding