[LU-19387] Support 64bit index llog

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Epic Link: Fault Tolerant MGS
• Assignee: Lai Siyao
• Reporter: Andreas Dilger

Description

The record index in plain llog is relative index in the llog, to get the global record index in the catalog, save the last record index of previous llog in the llog header, then (rec_index + llog_offset - 1) is the global record index in the catalog, herein '-1' is because llog header occupies index 0.