On Wed, 24 Dec 2014 12:49:39 +0100 (CET) Alexandre DERUMIER <aderum...@odiso.com> wrote:
> > >>Moreover, i have doubts over these 3 options (Bios Hardware): > >>- OS Watchdog timer (option available in all my servers) > > you can use it if you don't use fencing from proxmox. I'll restart the server > in case of a kernel panic for example. > > If would change recommendation to 'must disable in case of using fencing' > >>- I/OAT DMA Engine ( i am testing with two servers DELL R320, each server > >>with 2 NICs Intel of 1 Gb/s, 4 ports each one) > Don't known too much about this one. > An old Intel-only way to increase nic performance by offloading memory copies to DMA. Experimental support in VmWare 3.5 but since 4.x this support has been removed: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003712 The Linux kernel has supported it since 2006 but if this is the case for 2.6.32 I have no idea. Since VmWare has dropped support I guess it means it could cause problems for VMs. Maybe you face the same problems like hardware checksum offloading which has to be disabled for proper net speed (avoid massive package drop) > > Maybe it's related to turbo core, with some intel processor. > Generally, I recommand to turn this off, because it's dynamically shutdown > some cores to speedup other cores. > And virtualization don't like this too much, because of changing clock > frequency. (bsod under windows) > > Turbo core is also present on AMD multi core processors. -- Hilsen/Regards Michael Rasmussen Get my public GnuPG keys: michael <at> rasmussen <dot> cc http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xD3C9A00E mir <at> datanom <dot> net http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE501F51C mir <at> miras <dot> org http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE3E80917 -------------------------------------------------------------- /usr/games/fortune -es says: A method of solution is perfect if we can forsee from the start, and even prove, that following that method we shall attain our aim. -- Leibnitz
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