[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] high availability iscsi and xen setup
Hi Mark, Am Donnerstag, den 04.11.2010, 15:45 +0000 schrieb Mark Adams: > Hi Thomas, Thanks for your response. > > On Thu, Nov 04, 2010 at 03:46:44PM +0100, Thomas Halinka wrote: > > Hi Marc, > > > > Am Donnerstag, den 04.11.2010, 12:58 +0000 schrieb Mark Adams: > > > Hi All, > > > > > > I'm thinking about the best way to set this up, and would greatly > > > appreciate your learned opinions on it. I'm thinking of the following: > > > > > > - 2 Storage servers, running LVM, heartbeat, drbd (primary/standy) and > > > iscsi. > > > This will protect against 1 storage server failing. > > > > ACK > > > > > - 2 Xen hosts, running heartbeat to ensure the domU's are available. If > > > not, migrate all hosts on to other xen host. This will protect against > > > 1 xen host failure. > > > > ACK > > > > > > > > Any opinions on this arrangement of setup or links to resources > > > discussing it would be much appreciated. > > > > If ur interested i could provide a link to my wiki, which describes such > > a setup > > That would be excellent, thanks. Do you also do any multipathing so you > have network redundancy? or do you deal with this in some other way? in my tests multipath bonding and multipath had similar read-Performance, but multipath had much faster writes than a 802.3ad-Trunk so i just went with mulipathing... cu, thomas > > > > > > Also any alternative ways to > > > provide the same HA would be useful for comparison. > > > > > > - Any Pitfalls? > > > > nope - works like a charm > > > > > - Gaps in the availability? (split-brain possibilities?) > > > > Im running 2 iSCSI-Linux-Targets with a bunch of XEN-Boxes... > > > > > > > > - How would you add in additional xen hosts? would they always need to be > > > paired in this arrangement (1 fails over to the other..) > > > > No need for pairing. Just use hb2 with crm and udev for static > > device-names... > > > > > > - Is a clustered filesystem required? > > > > NOT required, but im testing another kind of such a setup. My receipt is > > to run XEN-Boxes with glusterfs as filebases-Diskbackend... > > > > http://www.gluster.com/community/documentation/index.php/GlusterFS_and_Xen > > > > first tests were impressive and performance was higher than iscsi, since > > im running ~60VMs over 10GBit-Nics, where the iscsi-targets were the > > bottleneck :-( > > > > > > > > Thanks in advance for any advice or opinions on this. > > > > > > Regards, > > > Mark > > > > hth, > > > > thomas > > > > > Cheers > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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