yecol commented on issue #548:
URL:
https://github.com/apache/incubator-graphar/issues/548#issuecomment-2251879274
Hi @jasinliu, I think this question does not come from the separate
placement of metadata and files.
The situation you mentioned, by only change the metadata is allowed and
evenly by design:
> e.g., a user has a graph G with edges labeled A/B/C, and vertices labeled
C/D.
He/She can easily generate a G' with edges labeled A and vertices labeled C,
by only copying/modifying the metadata M'.
Hence, for the validation tool, I suggest it may not check the pairing
unmodified. But to validate these:
- the modified metadata is self-valid. e.g., in the example above, in the M'
for G', the edges A are connecting ONLY the vertices labeled C, otherwise the
G' lack vertices.
- For the storage files, I suggest in the metadata should record each file
location and its digest/MD5, to ensure there is no modification since last
archive. When loading, check the MD5 to ensure the payload of the data is what
you intend to read.
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