Hi everyone, I'm planning to set up a PVFS2 system for my lab. I have a few questions about its scalability. We currently have a 10 tb RAID box, completely full. We just acquired an additional 24 tb RAID box, and enough hard drives to upgrade the old RAID. My plan was to set up pvfs2 on the 24tb RAID, copy all the data off the current RAID, upgrade that box, and add it to the pvfs2 cluster. The original plan was to use Lustre, but since I can't get it to compile on our systems, I'm trying out pvfs2.
So, the questions: 1) As I understand it, pvfs2 will stripe the data across all available object stores. Will this improve overall bandwidth? 2) What happens when we add the new RAID? Will we only be able to use 24-10 = 14 * 2 tb of space? 3) If we fill up our 48 tb RAID system and we would like to add another, how would that work? In Lustre, if an OST fills up, you can deactivate writes to it, so the rest of the space is still usable. Will pvfs2 only throw out a "no free space" error if we add additional storage in the future? Thanks in advance! -James Gao
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