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In log-based systems that prov

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In log-based systems that provide support for transactions,updates to data items cannot be performed before the corresponding entries are logged.Whyi s this restriction necessary?
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Smizy头像 Smizy
If the transaction needs to be aborted,then the values of the updated data values need to be rolled back to the old values.This requires the old values of the data entries to be logged before the updates are performed.
发表于 2018-05-05 22:16:24 回复(0)
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