Hi All,
So my boss and I decided to make a good size investment in a Gluster cluster. I'm super excited and I will be taking a Redhat Storage class soon.
However, we're debating the hardware configuration we intend to purchase. We agree that each brick/node, and we're buying four, each configured as RAID 10 will help us sleep at night, but to me, it seems like such an unfortunate waste of disk space. Our graduate and PHD students work with lots of video and they filled up our proof-of-concept 4 TB ownCloud/Gluster setup in < 2 months.
I stumbled upon Howtoforge's Gluster setup guide from two years ago and I'm wondering if this is correct and or still relevant:
This tutorial shows how to combine four single storage servers (running Ubuntu 12.10) to a distributed replicated storage with GlusterFS. Nodes 1 and 2 (replication1) as well as 3 and 4 (replication2) will mirror each other, and replication1 and replication2 will be combined to one larger storage server (distribution). Basically, this is RAID10 over network. If you lose one server from replication1 and one from replication2, the distributed volume continues to work. The client system (Ubuntu 12.10 as well) will be able to access the storage as if it was a local filesystem
The vendor we have chosen, System 76, offers either RAID 5 or RAID 10 in each server. Does anyone have insights or opinions on this? It would seem to be that RAID 5 would be okay and that some kind drive monitoring (opinions also welcome, please) would be sufficient with the inherent nature of Gluster's Distributed/Replicated setup. RAID 5 at System 76 allows us to max out at 42 TB of useable space. RAID 10 makes it 24 TB useable.
I'd love to hear any insights or opinions on this. To me, RAID 5 with Gluster in a distributed replicated setup should be sufficient and help us sleep well each night. :)
Thanks in advance!
Ryan
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