I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs?
Regards, Israel
On Thu, 2007-01-18 at 16:06 -0500, israel.garcia@cimex.com.cu wrote:
I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs?
Depending of the type of cluster ... Heartbeat to create a small cluster in a active/passive (or even active/active for different services) configuration DRBD to replicate data automagically between nodes. Both are available in the extras repository ..
israel.garcia@cimex.com.cu wrote:
I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs?
do you want a high availability cluster, or a high performance cluster? the two are completely different.
what application(s) is this cluster serving?
On Thu, 2007-01-18 at 19:55 -0800, John R Pierce wrote:
israel.garcia@cimex.com.cu wrote:
I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs?
do you want a high availability cluster, or a high performance cluster? the two are completely different.
Exactly ...
what application(s) is this cluster serving?
For a HA situation where you need a failover machine, DRBD is very easy to setup and use and it works well for what it does ... which is provide raid1 over the network wire to maintain a backup machine. You can not use the services on both machines (at the same time) in that scenario to share the load, it just provides a "hot spare" to rapidly switch to.
I use DRBD clusters for my main Domain Controller and main mail server ... as we need both of those to not fail.
For load sharing (ie, high performance) ... you would need a totally different kind of cluster.
Thanks, Johnny Hughes
Israel.garcia@cimex.com.cu wrote:
I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs?
Regards, Israel
I'm not sure how well it fits with CentOS, but take a look at openmosix. (btw I believe, as far as projects "live" in any geographic location, openmosix lives in Israel).
If you can hold out for RHEL5/CentOS5 then Xen might be useful. Apparently, and I've not done this, one can boot a Xen guest in one physical box, then migrate it to another while it's running.
Google might be able to tell you about high availability (HA) linux.
John Summerfield wrote:
Israel.garcia@cimex.com.cu wrote:
I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs?
Regards, Israel
I'm not sure how well it fits with CentOS, but take a look at openmosix. (btw I believe, as far as projects "live" in any geographic location, openmosix lives in Israel).
If you can hold out for RHEL5/CentOS5 then Xen might be useful. Apparently, and I've not done this, one can boot a Xen guest in one physical box, then migrate it to another while it's running.
You need some sort of shared storage like GFS, iSCSI, or possibly Lustre to do the xen VM shift between hosts trick.
Probably the simplest setup would be a heartbeat + drbd + stonith setup where each node runs one half of the services and acts as a backup in case the other fails.
Mike
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Fabian Arrotin -
israel.garcia＠cimex.com.cu -
John R Pierce -
John Summerfield -
Johnny Hughes -
Mike Fedyk