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1d
comment Skimp on CPU or skimp on RAM?
@AD7six Probably true. The canonical Q points it out pretty well.
1d
comment Skimp on CPU or skimp on RAM?
@AD7six After reading the comments I know enough. And ECC is a must have.
1d
answered Skimp on CPU or skimp on RAM?
May
15
comment Can I stripe 2 volumes on the operating system drive?
@hyppy You are wrong. Measure the values with a current hardware RAID controller.
May
15
comment Can I stripe 2 volumes on the operating system drive?
@Chopper3 agreed with 6 disks or more. Up to 8 disks I prefer R6, over 10 disks can give R10 a performance bonus (if the controller is not the bottleneck), but has less reduncy than R6. So generally our currenct policy is R6. But not for this case here.
May
15
answered Can I stripe 2 volumes on the operating system drive?
May
15
awarded  Informed
May
13
comment How can I best secure NFS between an Xen host on Debian and VMs?
@Nysepho I don't know if NFSv4 will be fast enough for your needs. iSCSI could be faster. There you have to activate CHAP to make the connection initiation secure. Do you need encrypted data on the line, too?
May
13
comment Preventing theft of data on remotely deployed servers exposed to physical access
@BlueCompute The question can arise in a professional environment as well, so it should stay here.
May
13
comment Preventing theft of data on remotely deployed servers exposed to physical access
Another way to access a server is by exploiting a weakness in drivers loaded through hot-plugging. So you should prevent access to all external ports (especially USB), too AND disable hot-plugging and/or unneeded drivers where possible.
May
11
answered How can I best secure NFS between an Xen host on Debian and VMs?
May
11
accepted Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?
May
11
answered Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?
May
9
comment Xen: network between dom0 and domU does not working, while network between particular domUs does
Flush firewall? Better disable it completely on the Dom0.
May
9
answered Why I get different network traffic values from dom0 and from domU?
May
9
comment Xen and Turbo Boost
What is the xen version? The hypervisor has to support this as well as the Dom0.
May
9
revised Can't attach iSCSI with multipathing in Citrix XenServer
changed xen to xenserver tag
May
7
comment Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?
You brought me onto the right track, though. xl console $DOMU pops up with xenconsole: Could not open tty .... There is a xenconsoled - that should be running together with xenstored. Both should be started via /etc/init.d/xencommons - guess what: xenconsoled was not running. After starting it manually I could connect to the console!
May
7
comment Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?
BTW: I had to serialize the startup of VMs on SLES11/SP3 with xm stack as well. That is rather a xend-problem than a performance problem (one of the reasons I want to get rid of xend). I did open an SLES SR for this and the problem was that xend was not able to manage multiple parallel temporary boot devices. These are needed in the Dom0 during startup of a DomU for copying the DomU kernel to the Dom0.
May
7
revised Why do I not get a console for my CentOS6 PV DomU on CentOS6XEN4 Dom0?
Added hint about working CentOS5 DomU