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authorMichael Adam <obnox@samba.org>2008-05-06 10:06:34 +0200
committerMichael Adam <obnox@samba.org>2008-05-08 18:29:10 +0200
commit01e640f6ea609ec2235543d69b1715a1be7d09b3 (patch)
tree79c7dea2a701c610f560dafc0efc5b866040cdd3 /source3/tests
parent7fa4cd242163cf048785585b7a1f392aeefeb20f (diff)
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registry: add comment explaining workflow to make store_keys safe w/o transactions
/* * Make the store operation as safe as possible without transactions: * * (1) For each subkey removed from ctr compared with old_subkeys: * * (a) First delete the value db entry. * * (b) Next delete the secdesc db record. * * (c) Then delete the subkey list entry. * * (2) Now write the list of subkeys of the parent key, * deleting removed entries and adding new ones. * * (3) Finally create the subkey list entries for the added keys. * * This way if we crash half-way in between deleting the subkeys * and storing the parent's list of subkeys, no old data can pop up * out of the blue when re-adding keys later on. */ The workflow is going to be modified to meet this agendain the next commits. Michael (This used to be commit 55dd9bdd148fc942e15aacfe9f6b38b1a5c53158)
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