Is it possible to create a highly-available OCFS2 cluster (i.e., A storage cluster that mitigates the single point of failure [SPoF] created by storing an OCFS2 volume on a single LUN)? The OCFS2 Project Page makes this claim...> OCFS2 is a general-purpose shared-disk cluster file system for Linux capable ofproviding both high performance and high availability. ...but without backing-up the claim of high availability storage (at either the HDD- or the node-level). I've found a couple of articles hinting at using Linux Multipathing or DRBD but very little detailed information about either. TIA, Eric Pretorious Truckee, CA -------------- next part -------------- An HTML attachment was scrubbed... URL: http://oss.oracle.com/pipermail/ocfs2-users/attachments/20120913/bb09cbe3/attachment.html
cfs != storage You need to get a highly available storage that is concurrently accessible from multiple nodes. ocfs2 will allow multiple nodes to concurrently access the same storage. With posix semantics. If a node dies, the remaining nodes will pause to recover and then continue functioning. The dead node can then restart and rejoin the cluster. On Thu, Sep 13, 2012 at 5:02 PM, Eric <epretorious at yahoo.com> wrote:> Is it possible to create a highly-available OCFS2 cluster (i.e., A storage > cluster that mitigates the single point of failure [SPoF] created by > storing an OCFS2 volume on a single LUN)? > > The OCFS2 Project Page makes this claim... > > > OCFS2 is a general-purpose shared-disk cluster file system for Linux > capable of providing both *high performance* and *high availability*. > > ...but without backing-up the claim of high availability storage (at > either the HDD- or the node-level). > > I've found a couple of articles hinting at using Linux Multipathing or > DRBD but very little detailed information about either. > > TIA, > Eric Pretorious > Truckee, CA > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users at oss.oracle.com > https://oss.oracle.com/mailman/listinfo/ocfs2-users >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://oss.oracle.com/pipermail/ocfs2-users/attachments/20120913/8d8947a8/attachment.html
On 2012-09-13T17:02:46, Eric <epretorious at yahoo.com> wrote:> Is it possible to create a highly-available OCFS2 cluster (i.e., A storage cluster that mitigates the single point of failure [SPoF] created by storing an OCFS2 volume on a single LUN)?Yes. You can use either cLVM2 with a mirrored volume for example, or store the data on storage that handles this internally (e.g., a mirroring SAN, iSCSI to DRBD, etc). Regards, Lars -- Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imend?rffer, HRB 21284 (AG N?rnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wilde