Zach Brown 5f11cdbfe5 scoutfs: add and index inode meta and data seqs ...

For each transaction we send a message to to the server asking for a
unique sequence number to associate with the transaction.  When we
change metadata or data of an inode we store the current transaction seq
in the inode and we index it with index items like the other inode
fields.

The server remembers the sequences it gives out.  When we go to walk the
inode sequence indexes we ask the server for the largest stable seq and
limit results to that seq.  This ensures that we never return seqs that
are past dirty items so never have inodes and seqs appear in the past.

Nodes use the sync timer to regularly cycle through seqs and ensure that
inode seq index walks don't get stuck on their otherwise idle seq.

Signed-off-by: Zach Brown <zab@versity.com>

2017-05-23 12:12:24 -07:00

kmod

scoutfs: add and index inode meta and data seqs

2017-05-23 12:12:24 -07:00

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