[Gluster-users] Rebalance with old bricks almost full

Emir Imamagic eimamagi at srce.hr
Thu Aug 21 12:42:00 UTC 2014


we have a setup with few bricks which were almost full. We added new 
ones and started rebalance process. We are using older version of 
Gluster 3.2.7 because we have mixed rdma/tcp setup. When we started the 
rebalance there was abouth 25% free space on the old bricks. However, 
since the volume is being used constantly we have a situation where old 
bricks are near cluster.min-free-disk limit (currently set to 50GB), 
while the new one have bunch of disk free (e.g. some old bricks are 100% 
used, while new ones are at 65% or 8TB disk free).

Could someone please clarify/advise:
- what will happen if rebalance process tries to push data to a brick 
which space is below cluster.min-free-disk limit? will gluster place 
this data automagically to one of free bricks? or will the data be lost?
- what is the recommendation in this situation - should I stop the 
rebalance and let gluster automatically place files to non-full bricks?

Thanks in advance,
Emir Imamagic
SRCE - University of Zagreb University Computing Centre, www.srce.unizg.hr
Emir.Imamagic at srce.hr, tel: +385 1 616 5809, fax: +385 1 616 5559

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