Symptom
Full replica started multiple times and fails.
[PID]{-1}[-1/-1] YYYY-MM-DD HH:MM:SS.SSSSSS i sr_dataaccess DisasterRecoveryProtocol.cpp(09482) : Secondary: Full Replica: 86 % (1428/1649 GB)
[PID]{-1}[-1/-1] YYYY-MM-DD HH:MM:SS.SSSSSS w PersistenceManag DisasterRecoveryProtocol.cpp(04631) : log buffer takes more than 30000000 us to process and write, this could be caused by write-IO peak.
[PID]{-1}[-1/-1] YYYY-MM-DD HH:MM:SS.SSSSSS w PersistenceManag DisasterRecoveryProtocol.cpp(04632) : This trace is intended to clarify frequent "logshipping timeout" situation. If this is the case, then it's probably by write-IO, not by network.
[PID]{-1}[-1/-1] YYYY-MM-DD HH:MM:SS.SSSSSS w PersistenceManag DisasterRecoveryProtocol.cpp(04633) : Buffer received: BufferHeader[<Address>-<Address>,cs=<CheckSum>,V2,BV3,partition=0,pos=14,segmentID=<ID>,filler=3264B,ts=YYYY-MM-DD HH:MM:SS.SSSSSS,PersGUID=<REDACTED_GUID>,GUID=<REDACTED_GUID>,PrevGUID=<REDACTED_GUID>], runtime: total=112872730 us (proc=4 wr=112872661 wait=1 finish=63), count= 1
[PID]{-1}[-1/-1] YYYY-MM-DD HH:MM:SS.SSSSSS i sr_dataaccess DisasterRecoveryProtocol.cpp(09482) : Secondary: Full Replica: 94 % (1558/1655 GB)
## since 300.01 seconds: overall: 876 MB/s, from network [avg]: 282 MB/s, to sink: 4019 MB/s##
[PID]{-1}[-1/-1] YYYY-MM-DD HH:MM:SS.SSSSSS i sr_dataaccess DisasterRecoveryProtocol.cpp(04932) : Transfer from primary statistics, size=444302016512, minReceiveThroughput=58.16MB/s, maxReceiveThroughput=1174.43MB/s, avgReceiveThroughputUnbiased=232.42MB/s, receiveCount=26476, minSendThroughput=10.98MB/s, maxSendThroughput=6637.87MB/s, avgSendThroughputUnbiased=3727.88MB/s, sendCount=26476
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Environment
SAP HANA, platform edition 2.0
Product
Keywords
system replication, asynchronous dr, tertiary site, log buffer,, write-io peak, logshipping timeout, full replica, hdbnsutil sr_register , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) , Problem
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