Thanks for ur reply. I heard about it and i wanted to know is it worth or not. It really helped. Regards
On Tue, Dec 16, 2008 at 12:26 AM, Chrissie Caulfield <[email protected]>wrote: > Ali Nazemian wrote: > > Hi every body, > > Any body knows that what happened to C-Sharifi project that announce 1 > > year ago?! that was about implementing clustering management in kernel... > > Cheers. > > I don't know about that particular project but I do know something about > implementing clustering in the kernel (from RHEL4 cman) and generally > it's a waste of time and energy. The cluster manager is not > performance-critical enough and too complex to do sensibly in the kernel. > > Having all the infrastructure in the kernel simply makes developing and > testing much much harder for no real gain. The performance-critical > components (eg lock manager and filesystem) can still be in the kernel > and leave the cluster manager in userspace where it can be easily > managed and reconfigured - have you ever tried to get an XML parser into > the kernel? No, me neither and I don't want to try ;-) > > About the only thing that a kernel-based cluster manager gains you is > freedom from memory inversion problems in low memory situations as you > can guarantee it is always in physical RAM, but even that isn't total as > you still have to rely on the networking layers. And there are ways of > locking userland process into memory anyway. They're not quite as > effective as having it kernel-based but those aren't perfect either! > > > Just my ha-penny's worth ... > > Chrissie > > -- > Linux-cluster mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/linux-cluster > -- A.Nazemian
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