Hi, everyone.
In the PGLog::merge_log method, pg log entries in "olog" are inserted into
current PGLog's "missing" structure only when they have "version" larger than
current PGLog's head and its target object has "soid" less than current pg
info's last_backfill. What does "last_backfill" in pg_info_t mean? Is it the
max object id that the pg possessed after the last recovery_backfill process?
If so, why only objects with "soid" less than "last_backfill" is considered
missing, what if new objects are created by the current osd and modified by
other osd during the current osd was "out" or "down"?
I'm really confused about this, please help me, thank you:-)
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