[Lustre-discuss] How to change inode capacity
Brian J. Murrell
Brian.Murrell at Sun.COM
Thu Jan 29 11:36:14 PST 2009
On Thu, 2009-01-29 at 13:32 +0900, Satoshi Isono wrote:
> Hi all,
> Do you know how to change the capacity of inode space?
Sorry, you can't. Up-front planning is very important in this aspect of
deploying Lustre. In the future, adding MDTs will increase inode
capacity, but currently only a single MDT is supported.
I *think* growing the size of the physical device and then using
resize2fs to increase an ext3(4?) filesystem will increase inode count.
I am however, doubtful that resize2fs will work with our ldiskfs
filesystems. Perhaps resize2fs from an ext4 supporting version of
e2fsprogs will support doing that. I have no idea -- never tried it.
That said, doing this is a completely unsupported operation. I don't
know anyone that has even tried it. If you want to go this route, do a
lot of testing and make sure you have backups.
It will probably be easier and cheaper in the long run to just build a
new MDT that meets your revised requirements.
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