* Alex Bligh <alex@xxxxxxxxxxx> hat geschrieben: > I might have another look at using lvm as a blockstore, then running our > stuff inside lvm. But I didn't think lvm was capable of running thousands > of LVs per volume group. ext4 is just fine for that. Perhaps I am > slating lvm unfairly. The number of logical volumes you can create should be mostly dependand on the size of the metadata area. A short look on man pvcreate revealed the command line argument --metadatasize size. Besides of this, lvm should be able to handle any arbitrary number of logical volumes as long as the metadata area is big enough to hold the new config. (The same applies to ext2 and ext3 - if you don't have inodes left, you can't create new files even with thousands of free terabytes - don't know, if this limitation still exists in ext4, I'd guess "yes".) So, my tip would be to just create a pv with a very bit metadata size (i.e. 512 MB or even bigger) and write a script to create a few thousand pv on that pv, something like this pvcreate --metadatasize 512M /dev/foobar lvcreate foobars /dev/foobar for i in $(seq 1 1 5000) do lvcreate --size 256M -n foobar$i foobars done Either it works - or not ... Regards, Bodo _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
