transaction failed due to disk full (no replies)

Hello,

I have a quite simple table called mytbl, which has 10 million rows and runs on NDB cluster.

When excuting a query like 'alter table mytbl partition by key(myid)', mysql crashed. the errror says "the file system is full" and "unable to store fragment during LCP”."

it's clear that the query run out of disk. I saw many REDO and LCP files.

my question is how can I do if I
- cannot change OS filesystem
- cannot lose data

Thanks

Alax