Hi Steve,
Yes indeed I have two separate storage files, an error in my email, sorry. I should have pasted both parts rather than duplicate and edit from memory.
Cool!
Do the ranges have to be in some proportions to the disk size used ?
No. The size of the handle ranges are sorta equivalent to the # of on-disk inodes supported by most disk=based file systems such as ext3. They don't have any correlation to the amount of disk size etc.. thanks, Murali
steve -------Original Message------- From: Murali Vilayannur Date: 12/01/2007 17:55:08 To: Steve Cc: [email protected]; Greg Kurtzer Subject: Re: Multiple data stores on one machine Hi Steve, Looks good. See inline comments below... > <Aliases> > Alias caos1 TCP://caos:3334 > Alias caos2 TCP://caos:3335 > </Aliases> > <Filesystem> > Name pvfs2-fs > ID 699094865 > RootHandle 1048576 > <MetaHandleRanges> > Range caos1 4-214748365> > </MetaHandleRanges> > > <DataHandleRanges> > > Range caos1 2147483651-4294967297 > > Range caos2 4294967298-6442450944 > > </DataHandleRanges> > > <StorageHints> > > TroveSyncMeta yes > > TroveSyncData no > > </StorageHints> > > </Filesystem> > > > > /etc/pvfs2-server.conf-caos1 > > StorageSpace /pvfs2-storage-space (^) See the comment on why it is a bad idea to share storage spaces below... > > HostID "TCP://caos:3334" > > LogFile /tmp/pvfs2-server.log > > > > /etc/pvfs2-server.conf-caos2 > > StorageSpace /pvfs2-storage-space ^^^^^^^^ Please don't use the same storage space for 2 different pvfs2-server Processes on the same node! They may end up trampling over each other. I thought the whole point of what you were trying to do was to add Some new storage space/drives to the pvfs2 volume!! :) > > Pvfs2-server /etc/pvfs2-fs.conf /etc/pvfs2-server.conf-caos1 -f > > Pvfs2-server /etc/pvfs2-fs.conf /etc/pvfs2-server.conf-caos2 -f > > > > Then started 2 servers > > > > Pvfs2-server /etc/pvfs2-fs.conf /etc/pvfs2-server.conf-caos1 > > Pvfs2-server /etc/pvfs2-fs.conf /etc/pvfs2-server.conf-caos2 > > > > Is that correct that I need to run 2 server daemons ? Yes! Running both the daemons is correct.. > The mount command then seems a little confusing > > Mount -t pvfs2 TCP://caos:3334/pvfs2-fs /mnt/pvfs2 > > As you only reference one port. This is probably documented somewhere, but it is possible to use any Of the servers for mounting!! All you need to pass is a valid bmi URL for a valid config server, so In this case Mount -t pvfs2 TCP://caos:3335/pvfs2-fs /mnt/pvfs2 Would also have worked fine. > In this instance I started with genconfig editing the files to get a > starting point. Can you explain the numbers and how a would choose the range > to add another files store ? Is it a simple as calculating the difference > from one range and adding that to last one used ? Yes it is! Just make sure that no handle ranges overlap with each other. For fairness, it would be best if all servers see roughly the same # Of handle ranges So that the handle allocator can fairly disperse the handles to all the servers. Hope this explains all your questions, Thanks, Murali > > > > Steve > > > > > > >
_______________________________________________ Pvfs2-users mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
