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Raid should store the metadata in HDFS
Details
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Improvement
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Status: Resolved
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Major
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Resolution: Won't Fix
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0.22.0
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None
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None
Description
Currently if you change the stripe length in the raid policy. The existing raided files cannot be recovered.
Also in the future if we want to upgrade to a better erasure code such as Reed-Solomon or LDPC and change the policy for that.
The same problem will happen. We can avoid this problem if we store the information in a metadata file.
Attachments
Issue Links
- is related to
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New Feature - A new feature of the product, which has yet to be developed. HDFS-503 Implement erasure coding as a layer on HDFS
- Major - Major loss of function.
- Closed