Product SiteDocumentation Site

9.18. Log Sequence Numbers

An LSN is the log sequence number
The block number is assigned when it is committed
The cycle number is incremented each time we have cycled through the log
The metadata in the log is only the metadata that has changed, in theory, but the whole inode tends to be logged.
One of the flaws of the xfs logging, is that everything that changed is logged even if sometime later we changed that field again, we still log the original change.