删除WAL文件后，PostgreSQL热备份将无法启动

Question

I have a PostgreSQL 9.1 hot standby server. The WAL files ended up taking up the entire HD so I ended up deleting all the WAP files. How I want to bring the server back up so I ran:

/usr/local/pgsql/bin/pg_ctl start  -D /usr/local/pgsql/data

The problem is the server never fully starts. I see this follow by non-stop missing WAL files log outputs:

server starting
sh-4.1$ LOG:  database system was shut down in recovery at 2013-02-10 03:17:06 UTC
LOG:  entering standby mode
cp: cannot stat `/usr/local/pgsql/wals/0000000100000035000000A4': No such file or directory
LOG:  redo starts at 35/A4943928
LOG:  consistent recovery state reached at 35/A4AE8EB8
LOG:  database system is ready to accept read only connections
LOG:  invalid record length at 35/A4AE8EB8
cp: cannot stat `/usr/local/pgsql/wals/0000000100000035000000A4': No such file or directory
LOG:  streaming replication successfully connected to primary
FATAL:  could not receive data from WAL stream: FATAL:  requested WAL segment 0000000100000035000000A4 has already been removed

How can I get the server back?

Answer 1

You need to recreate the hot standby server from the dump (or filesystem copy).

Details on how to do that you can find in this manual: High Availability, Load Balancing, and Replication

Answer 2

在以流方式将从属主机连接到主主机之前，请检查所需的wal是否在您要进行初始还原的位置上...由于从中进行初始恢复的wal段不可用，可能会发生上述问题。 ..如果这种情况很好，请在recovery.conf中检查您的restore_command。