similar to: Choices for shared network storage, NFS vs iSCSI

Running Centos 5.4 with KVM on a Dell R610 server and I'd like to control which of the four ethernet interfaces are used for specific tasks My ideal configuration would be eth0 - Host traffic only, no virtual guests. Used for guest mirroring and management. eth1 - NAT guest traffic only, no address for local machine and in some environments in the same zone as eth0 eth2/3 - Allocated to two

Is anyone else having major I/O peaks due to logrotate or other jobs running simultaneously across multiple guests. I have one KVM server running Centos 5.4 with local disk that is seriously suffering as most of the guests rotate their syslog at the same time. Looking at the KVM server I'm seeing 11:00:01 PM CPU %user %nice %system %iowait %steal %idle 03:40:01 AM

Hi all, I order to reach maximum performance on my centos kvm hosts I have use these params: - On /etc/grub.conf: kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=LABEL=/ elevator=deadline quiet - On sysctl.conf # Special network params net.core.rmem_default = 8388608 net.core.wmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216

Hi, I would like to get some input from people who have used these options for mounting a remote server to a local server. Basically, I need to replicate / backup data from one server to another, but over the internet (i.e. insecure channels) Currently we have been mounting an SMB share over SSH, but it's got it's own set of problems. And I don't know if this is optimal, or if I

Are their any good guides out there on how to use ksmctl to enable and tune KSM performance on Centos/RedHat At the moment the only guidelines I can find are from the following OLS paper, plus the Linux Kernel Docs. * http://www.kernel.org/doc/ols/2009/ols2009-pages-19-28.pdf * http://www.kernel.org/doc/Documentation/vm/ksm.txt On a basic dual core testbed with 4GB Ram and 4-5 VMs I've

It also got the bulletin out to new users without admin intervention. Sent from Mobile ________________________________ From: Doug Hardie<mailto:bc979 at lafn.org> Sent: ?2/?22/?2016 4:02 To: Dovecot Mailing List<mailto:dovecot at dovecot.org>; Timo Sirainen<mailto:tss at iki.fi> Cc: Kevin Kershner<mailto:cstkersh at outlook.com> Subject: Re: Dovecot Bulletin > On 20

I'd like to revisit and old post if I may, will/does Dovecot support the old qpopper "Bulletin" ability? Basically I need a simple way of posting bulletins to all domain users. Qpopper maintained a bulletin db for each user and sent them the next bulletin in sequence. Thanks in advance Kevin

Hi Everyone I am looking at setting up a File Server that uses ISCSI storage. It is the first time I have done this, so I am wanting to get peoples thoughts on whether for CentOS systems you should use Hardware based ISCSI HBA's? If so do I need to be careful about what HBA I use ? Currently I am looking at purchasing a Dell System using Broadcom ethernet cards/ ISCSI HBA. From

Hi, I have set up a 40GB iscsi target on my san and when I add it in to the storage pool and it shows up as 40GB. When I try to create a 40GB volume in the ovirt UI it tries to but fails. The error message is that the volume will not fit. If I create one smaller than 40GB it works. Is anyone else experiencing this? Also, if I then start a virtual machine up to install on the newly

Hi All, I've been trying to figure out the best way of using an iSCSI SAN with KVM and thanks to a helpful post by Tom Georgoulias that I found on this list (https://www.redhat.com/archives/libvirt-users/2010-May/msg00008.html), it appears I have a solution. What I'm wondering is the following: 1) If I use an iSCSI LUN as the storage pool (instead of creating an LVM VG from this iSCSI

Hello, we are running Dovecot (2.2.13-12~deb8u1) on Debian stable. Configured with Mailbox++, IMAP, POP3, LMTPD, Managesieved, ACL. Mailboxes are on local 1.2TB RAID, it's about 5310 accounts. We are slowly getting out of space and we are considering to move Mailboxes onto Netapp disk array with two independent network connections. Are there some pitfalls? Not sure we should use NTP or

First, I am new to Xen.... So forgive me if I am overlooking something. Here is my situation, I have multiple dom0''s that are part of an ocfs2 cluster. The dom0''s mount multiple volumes (/home, /app, /images) from an ISCSI storage array. Their eth2/eth3 network interfaces are attached to a private storage network. They are not part of Xen''s network bridge and have

Hello I have a CentOS VM with a lots of inodes, and 500GB +/-, running under hyper-v . Which is best for backup them? What is the pros and cons? Thanks for attention.

I'm wondering under what circumstances the kvm-clock source is exposed to a guest. I've got a bunch of KVM servers running Centos 5.5 and some of the guests have are defaulting to jiffies or apic whilst some are picking up kvm-clock. Looking at the virtual machine definition file there doesn't appear to be a difference, Any where else to look? Steve -- Steven Ellis - Bulletin.Net

I'm wondering under what circumstances the kvm-clock source is exposed to a guest. I've got a bunch of KVM servers running Centos 5.5 and some of the guests have are defaulting to jiffies or apic whilst some are picking up kvm-clock. These guests are a mix of 32bit and 64bit Centos 5.5. Looking at the virtual machine definition file there doesn't appear to be a difference between the

Hi, it is possible to create and setup/format volumes on a iscsi storage on one server and than disconnect and attache the storage to an other server. AFAIK on the 'new' server I do have to launch an LVM-scan command ... after login to the iscsi target. But which LVM-command and syntax was it? Thanks for any hint! :) /G?tz -- G?tz Reinicke IT-Koordinator Tel. +49 7141 969 420 Fax

Hello ! I was wondering if anyone has done any kind of benchmarks regarding having a NFS export or using ISCSI. If not, is there any idea in how to do those benchmarks. In my case I will us NFS or ISCSI to export some space to run a mysql server, oracle 10g and ordinary file share. At this point I have 3 iscsi "servers" and 3 isci clients, each one running one service. All the

As a long term user of qpopper with bulletins, I'd like to know if the bulletin feature is planned for dovecot? I really miss bulletins :-), this is very convenient way of providing information to users. Best regards, MU

Hi, I just completed testing on using Gluster via it's NFS server in a XenServer environment. My comparison was iSCSI in the same environment. You can see the results at http://majentis.com/2011/09/21/xenserver-iscsi-and-glusterfsnfs/ Gerald

Package: xcp-storage-managers Version: 0.1.1-2 Severity: important Dear Maintainer, I can not create an iSCSI storage resource using the following command: xe sr-create host-uuid=<my-host-uuid> content-type=user name-label="LVM over iSCSI SR"> shared=true device-config:target=192.168.10.100 device-config:targetIQN=<here-target-iqn>