[lustre-discuss] lfs_migrate transfer question

Bob Ball ball at umich.edu
Mon Sep 26 06:21:04 PDT 2016

Pre-make your list of files, split it into 5 or so parts, give each of 5 
clients one piece, and let them migrate in parallel.


On 9/26/2016 9:00 AM, Jérôme BECOT wrote:
> Hello,
> As we had a inode usage issue, we did as Andreas advised :
> - add a new ost with much more inodes
> - disable the first ost
> - use lfs_migrate to move files to the new ost
> We have about 16M files on this OST (7.5TB). Our OSS are connected via 
> 10Gbps Ethernet, though the lfs_migrate command has been launched on a 
> 1Gbps connected client.
> It's running for 5 days and is at about 50% now. It's pretty slow.
> Since the command has been launched on a client, does the data transit 
> through it ? Is there any way to improve performances ? (we will have 
> to move data from the 2nd ost back once the first one will get more 
> inodes, then reformat it, then rebalance)
> Thank you

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