<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312"> <META NAME="Generator" CONTENT="MS Exchange Server version 6.0.6249.1"> <TITLE>RE: RE: [linux-lvm] extending LVM for school project</TITLE> </HEAD> <BODY>  Hi Zonk, Though it would have been a luxury to have a fully shared configuration, but Veritas already has a solution for such an environment … so the kind of work I am taking up is rather new I believe … This is all that my broad plan is … • The Clustered Volume Manager will use single writer / multiple reader policy. • The Clustered Volume Manager will support hybrid configuration. • The Clustered Volume Manager will be designed so as to allow multiple nodes to access the shared VM objects simultaneously. • Each node in the cluster shall own a subset of shared VM objects. • A node is allowed to write only onto its VM objects. Other nodes can only read from them. • In the event of configuration change, the new configuration will be made available to other nodes present in the cluster. • The Clustered Volume Manger will entirely depend upon HA for cluster membership services and failover mechanism. • In case of node failure, Clustered Volume Manager ensures failover of the shared VM objects to the surviving nodes, provided the VM objects are accessible from the surviving nodes. So is this in sync with the kind of environment you have ... Thanks, Sharad > >-----Original Message----- > >From: lbg01@mails.tsinghua.edu.cn [<A HREF="mailto:lbg01@mails.tsinghua.edu.cn">mailto:lbg01@mails.tsinghua.edu.cn</A>] > >Sent: Friday, April 11, 2003 7:06 AM > >To: linux-lvm@sistina.com > >Subject: Re: RE: [linux-lvm] extending LVM for school project > > > >Sharad Tiwari, > > > >I'm very interesting with your plan.I've shared disks in a clustered > >environment > >and I'll plan to develop the LVM more available,be fit for cluster > >environment, > >and if possible,make the storage pool in the LVM. > > > >thanks, > >zonk. > > > > > > > >======= 2003-04-09 11:51:00 您在来信中写道：======= > > > >>What about working towards making LVM cluster aware and making it more > >>available, putting in better failover mechanisms in a clustered > >>environment ... > >> > >>If the work is done for for a hybrid setup (no need to have a shared > >>disk, or you may have a mix of shared disk and just a some disks > >>connected to one of the nodes in the network.) you can save the cost of > >>having to buy expensive disks and switches and can do the work with the > >>available setup in the university. > >> > >>I am myself planning to work towards extending LVM2 for such a setup and > >>we can share our work : )O > >> > >>Thanks, > >>Sharad. > >> > >>> >-----Original Message----- > >>> >From: Kai-Min Sung [<A HREF="mailto:k@kaisung.com">mailto:k@kaisung.com</A>] > >>> >Sent: Wednesday, April 09, 2003 11:25 AM > >>> >To: Linux-lvm@sistina.com > >>> >Subject: [linux-lvm] extending LVM for school project > >>> > > >>> >Hey everyone, > >>> > I'm a masters student taking a distributed systems project class > >>> >and would like to work on extending LVM. My initial idea was to > >>modify > >>> >LVM and allow it to create physical volumes using disks on remote > >>nodes. > >>> >But then I read posts about using ENBD to achieve this. Do people on > >>> >this list have suggestions or ideas for a fun/interesting project > >>that > >>> >could be accomplished within 10 weeks? > >>> > > >>> >Regards, > >>> >Kai-Min Sung > >>> > > >>> > > >>> > > >>> >_______________________________________________ > >>> >linux-lvm mailing list > >>> >linux-lvm@sistina.com > >>> ><A HREF="http://lists.sistina.com/mailman/listinfo/linux-lvm">http://lists.sistina.com/mailman/listinfo/linux-lvm</A> > >>> >read the LVM HOW-TO at <A HREF="http://tldp.org/HOWTO/LVM-HOWTO/">http://tldp.org/HOWTO/LVM-HOWTO/</A> > >> > >>_______________________________________________ > >>linux-lvm mailing list > >>linux-lvm@sistina.com > >><A HREF="http://lists.sistina.com/mailman/listinfo/linux-lvm">http://lists.sistina.com/mailman/listinfo/linux-lvm</A> > >>read the LVM HOW-TO at <A HREF="http://tldp.org/HOWTO/LVM-HOWTO/">http://tldp.org/HOWTO/LVM-HOWTO/</A> > >>. > > > > > >　　　　　　　　lbg01@mails.tsinghua.edu.cn > >　　　　　　　　　　2003-04-11 > > > > > > > > > > > >_______________________________________________ > >linux-lvm mailing list > >linux-lvm@sistina.com > ><A HREF="http://lists.sistina.com/mailman/listinfo/linux-lvm">http://lists.sistina.com/mailman/listinfo/linux-lvm</A> > >read the LVM HOW-TO at <A HREF="http://tldp.org/HOWTO/LVM-HOWTO/">http://tldp.org/HOWTO/LVM-HOWTO/</A> </BODY> </HTML>