similar to: Xen - Backend or Frontend or Both?

Lets say you had 4 servers and you wanted to setup replicate and distribute. What methoid would be better: server sdb1 xen0 brick0 xen1 mirror0 xen2 brick1 xen3 mirror1 replicate block0 - brick0 mirror0 replicate block1 - brick1 mirror1 distribute unify - block0 block1 or server sdb1 sdb2 xen0 brick0 mirror3 xen1 brick1 mirror0 xen2 brick2 mirror1 xen3 brick3 mirror2 replicate block0 -

Supermicro X7DWN+, XEON 5410, Centos 5.2, Xen 3.2.1 At what looks like random times network traffic over xen bridge stops working, the only way I found to fix it is a reboot. This sometimes takes 10 min, other times it may be up for 10 days. This happened with default xen that comes with RedHat EL 5.2 as well as a default install of Fedora 8. Any ideas? ><> Nathan Stratton

Hello guys, I have two mirrors. I need to compare files and directories on both mirrors and as a result print list of those which are missing on mirror 2 What i did find /data > find.mirror1 find /data > find.mirror2 Now i need to get list of those directories which are missing in mirror1. Thanks in advance! David -------------- next part -------------- An HTML attachment was

Hello, What is for you the best GlusterFS scenario in using XenServer (i'm not talking about Xen on a linux but XenServer baremetal) for a web farm (Apache-Tomcat) ? I were thinking of using ZFS as the filesystem for the different nodes. The objectives/needs : * A storage cluster with the capacity equal to at least 1 node(assuming all nodes are the same). * being able to lose/take down any

Hello folks, I am running Xen 2.6 under Centos 5.2 installation, and am trying to port Xen migration abilities to Infiniband. But, the InfiniBand drivers do not work under Xen kernel, only under non-Xen kernels. It looks like I need to install some patches to rectify the situation. Has anyone ever worked with Infiniband and Xen and would be able to give me inputs about the same? I would really

Hello, On a xenserver with several (39) domUs, we experience problems with the system clock of the domUs. The clock seems to drift away several seconds up to two minutes from the dom0 clock. We do have set independent_wallclock=0. According to the docs (i.e. http://wiki.xensource.com/xenwiki/InstallationNotes) that way domUs should use the dom0 clock, but apparently that''s not the case.

In reading the Xen list there are frequent postings regarding NTP time drift issues for virtualized guests, correct configurations, etc. We have a solution (no cost) for monitoring time drift of hosts for anyone needing to do so or to determine whether their environment is maintaining time synchronization. For etiquette I am not publishing the information to the list mailing. If interested,

Hello Everyone, I recently had a question that got no responses about GFS+DRBD clusters for Xen VM storage, but after some consideration (and a lot of Googling) I have a couple of new questions. Basically what we have here are two servers that will each have a RAID-5 array filled up with 5 x 320GB SATA drives, I want to have these as useable file systems on both servers (as they will both be

Greetings. I''ve reviewed the list archives, particularly the posts from Zakk, on this subject, and found results similar to his. drbd provides a block-drbd script, but with full virtualization, at least on RHEL 5, this does not work; by the time the block script is run, the qemu-dm has already been started. Instead I''ve been simply musing the possibility of keeping the drbd

I am experiencing strange network behavior from several DomU''s. I can ssh from DomU to any host on the local lan/vlan, I can ping those hosts. However when I go to resolve a hostname DNS fails. I have verified that three other DomU''s are exhibiting the same behavior. I have also verified that Dom0 is functioning properly and can resolve hostnames and access hosts outside of the

Trying to get Xen working with Gluster. I understand you need --disable-direct-io-mode, however that cuts my disk I/O from 130 MB/s to only 22 MB/s. Also when I try to use xen with tap:aio, but only get to Creating root device. Red Hat nash version 5.1.19.6 starting Mounting proc filesystem Mounting sysfs filesystem Creating /dev Creating initial device nodes Setting up hotplug. Creating

I am running Xen 3.3.0 and am trying to run a XenEnterprise image. The image has a hda directory with files called chunk-000000000.gz - chunk-000000042.gz and a filed called ova.xml with the following: <appliance version="0.1"> <vm name="VM"> <label> Manager </label> <shortdesc> </shortdesc> <config

So I have a problem, I have learned that GlusterFS 2.0.8 will not self heal on open files. This would not be a huge problem, except I am running xen and my files are basically always open. I have been running things for about a week now and I am concerned that when I have a crash I could lose all the new data. Is there a way to see what node GlusterFS is using for a open file and is there a

I'm trying to justify a GlusterFS storage system for my technology development group and I want to get some clarification on something that I can't seem to figure out architecture wise... My storage system will be rather large. Significant fraction of a petabyte and will require scaling in size for at least one decade. from what I understand GlusterFS achieves redundancy through

In english: Buddies, The Eucalyptus is a system to build a cluster and provide a service such as Amazon EC2 on its own structure. It is very promising, flexible, stable and well documented. The team of Eucalyptus just created an Internet election to choose which distributions will be officialy supported by it. I would ask everyone for voting in Debian! Let me explain why. I have

In english: Buddies, The Eucalyptus is a system to build a cluster and provide a service such as Amazon EC2 on its own structure. It is very promising, flexible, stable and well documented. The team of Eucalyptus just created an Internet election to choose which distributions will be officialy supported by it. I would ask everyone for voting in Debian! Let me explain why. I have

?Hi, I have the next scenario: ############################################################################# SERVER SIDE? (64 bit architecture) ?############################################################################# Two Storage Machines with: HARDWARE DELL PE2900 III Intel Quad Core Xeon E5420 2,5Ghz, 2x6Mb cache, Bus 1333FSB RAM 4 GB FB 667Mhz (2x2Gb) 8 HDD 1 TB,

Hi, I can't manage to get rsync's --link-dest option working. Here is a step by step script which doesn't produce the good results. # create test dir mkdir testrsync cd testrsync mkdir orig echo "abcd" > orig/testfile # create a mirror rsync -apog orig/ mirror/ # create another mirror using link-dest rsync -apog --link-dest=mirror/ orig/ mirror2/ # look at inodes ls

Hi, Ady wrote: > so, why the original isohybrid image from Debian and many other > isohybrid images have mostly (but not all) "00s" in place of the "90s"? That's a fake Block0 of an Apple Partition Map. Part of mjg's layout. Caused by isohybrid option --mac or xorrisofs option -isohybrid-apm-hfsplus. * Fedora has it with EFI FAT filesystem in one partition

Hi, Gene Cumm wrote: > it seems the stack format got > set, changed, then mostly reverted back, with this code being the last > piece missing from 2009. The commit to isohdpfx.S of 2009-05-31 looks incomplete. The sequence of the stack pointers was swapped, but the sequence of stack pushes was not.