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From: Walker, B. J (HP-Labs) <bru...@hp...> - 2009-05-11 17:23:06
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Another way of putting it: In native OpenSSI (without integrating with GFS or OCFS or other "cluster" filesystems), all filesystems physically stored on all nodes are transparently visible to all process/users on all nodes (thus the name Single System Image). This is done under the covers using technology called CFS. There is no requirement for each node to be physically attached to each filesystem and in fact CFS is like NFS in that it goes over the interconnect to the single node that is physically attached to the disk with the data. If you have more than one node attached to the disk (shared disk), then CFS can do transparent failover if the node which initially served up the data (mounted the filesystem) fails. In fact I believe it works that you can transparently move the serving of the filesystem from one node to another while it is active. As John mentioned, there have been integratiion efforts with GFS and OCFS to allow direct physical access to the data from all nodes (of course assuming you have direct physical access from all nodes). Not sure if that code currently works. Bruce walker -----Original Message----- From: John Hughes [mailto:jo...@Ca...] Sent: Monday, May 11, 2009 12:50 AM To: CooLCaT@Vienna Cc: ssi...@li... Subject: Re: [SSI-users] How do I make every node have direct access to the file system? Could we go back to the beginning. What exactly are you trying to achieve? "every node has direct access to the filesystem"? Then you don't want NFS, that gives you no more "direct" access than OpenSSI CFS. It sounds like you want GFS, which OpenSSI supports (although I've never tried it). ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ Ssic-linux-users mailing list Ssi...@li... https://lists.sourceforge.net/lists/listinfo/ssic-linux-users |
