Hi, I am trying to hack Lustre code to implement RAID at the OST level. Unfortunately, I am lost in the code and am unable to figure out an easy way to send out the generated parity to the targets. From what I understand, all writes to the targets are done using page. While new page pointer can be allocated for parity, they cannot be associated with the file inode. Is there any function in the lustre code which I could use to push my parity out given the parity and the target it is supposed to go to. Or could you give me ideas on how I could change the code to actually do this part.
I am still at the beginning stage, so this approach might sound very silly without locking, caching, consistency checks. I am in the process of developing a prototype first, and then plan to tighten the code to better standards. Really appreciate any help... Thanks, Sumit
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