For what I read, the maximum device size with kernel 2.6 is 16 TB. -----Mensaje original----- De: Jacob Joseph [mailto:jmjoseph@xxxxxxxxxxxxxx] Enviado el: Friday, January 01, 2005 3:57 AM Para: linux clustering Asunto: Re: [Linux-cluster] GFS and Storage greater than 2 TB Does this limit still exist with the cvs GFS on a 2.6 kernel? -Jacob Markus Miller wrote: > Thank you for the answer. That is all I needed to know. > > -----Mensaje original----- > De: Rick Stevens [mailto:rstevens@xxxxxxxxxxxxxxx] > Enviado el: Thursday, December 30, 2004 5:03 PM > Para: linux clistering > Asunto: Re: [Linux-cluster] GFS and Storage greater than 2 TB > > > Markus Miller wrote: > >>Hi, >> >>researching I found a posting to this list made by Kevin Anderson (Date: Tue, 19 Oct 2004 17:56:24 -0500) where he states the following: >> >>---snip--- >>Maximum size of each GFS filesystem for RHEL3 (2.4.x kernel) is 2 TB, >>you can have multiple filesystems of that level. So, to get access to >>10TB of data requires a minimum of 5 separate filesystems/storage >>combinations. >>---snip--- >> >>What do I have to do to achive this? Do I have to configure several GFS clusters in the cluster.ccs file (each of a máximum size of 2 TB)? Or do I have to configure one GFS cluster with serveral filesystems each with a maximum size of 2 TB? The GFS Admin Guide is not very precise, but what's really confusing me is the statement on page 12: "2 TB maximum, for total of all storage connected to a GFS cluster." >> >>At the moment we are evaluating to buy servers and storage, therefore I do not have any equipment to do the testing myself. >> >>Any coment is highly apreciated. > > > It's the GFS filesystem that has the limit (actually, it's the 2.4 > kernel). Essentially, "gfs_mkfs" can only handle a maximum of 2TB. > > What he means above is that you have to have five separate partitions > of 2TB each and each with a GFS filesystem on them. You have to mount > those five filesystems separately. If you're using VG/LVM, with a VG > as "vggroup" and LVs in that group as "test1" through "test5": > > mount -t gfs /dev/mapper/vggroup-test1 /mnt/gfs1 > mount -t gfs /dev/mapper/vggroup-test2 /mnt/gfs2 > mount -t gfs /dev/mapper/vggroup-test3 /mnt/gfs3 > mount -t gfs /dev/mapper/vggroup-test4 /mnt/gfs4 > mount -t gfs /dev/mapper/vggroup-test5 /mnt/gfs5 > > How you use them after that is up to you. Just remember that a given > GFS filesystem under kernel 2.4 is limited to 2TB maximum > ---------------------------------------------------------------------- > - Rick Stevens, Senior Systems Engineer rstevens@xxxxxxxxxxxxxxx - > - VitalStream, Inc. http://www.vitalstream.com - > - - > - Brain: The organ with which we think that we think. - > ---------------------------------------------------------------------- > > -- > > Linux-cluster@xxxxxxxxxx > http://www.redhat.com/mailman/listinfo/linux-cluster > > > -- > > Linux-cluster@xxxxxxxxxx > http://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster@xxxxxxxxxx http://www.redhat.com/mailman/listinfo/linux-cluster
