Comments (1)
incompatible upgrade problems:
- data strcuture incompatible:
(1)transaction type or block type changed ,added or deleted some fieled
(2)added or deleted some data type
may be have these problems when upgrading:
(1) load old data fail
(2) verifying fail ,verifing consensus and other requirements
(3) sync data , produced new block and some nodes are not upgrade yet
solution :
versioning ? change any data field upgrade version and remain old version code ?
after all nodes upgrating , node also can rewrite data with new version.
2.p2p communication protocol or data changed
p2p protocol or data changes , some node use old data structure and some use new data structure ,how to solve this ?
versioning , after a now upgreade , send old version data and swap it's version , then if another node upgrade ,they will communicate in new protocol or new version data
- rpc api changes
versioning :
old version api process old data , new version api process new version data。
old : /api/...
new: /api/v2/...
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