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.IX Title "SAVE_BINARY_LOGS 1p"
.TH SAVE_BINARY_LOGS 1p "2023-10-03" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
save_binary_logs \- Concatenating binary or relay logs from the specified 
file/position to the end of the log. This command is automatically executed from MHA Manager on failover, and manual execution should not be needed normally.
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
# Test
.PP
$ save_binary_logs \-\-command=test  \-\-binlog_dir=/var/lib/mysql \-\-start_file=mysqld\-bin.000002
.PP
# Saving binary logs
.PP
$ save_binary_logs \-\-command=save \-\-binlog_dir=/var/lib/mysql \-\-start_file=mysqld\-bin.000002 \-\-start_pos=312  \-\-output_file=/var/tmp/aggregate.binlog
.PP
# Saving relay logs
.PP
$ save_binary_logs \-\-command=save \-\-start_file=mysqld\-relay\-bin.000002 \-\-start_pos=312 \-\-relay_log_info=/var/lib/mysql/relay\-log.info \-\-output_file=/var/tmp/aggregate.binlog
.PP
save_binary_logs concatenates binary or relay logs from the specified log 
file/position to the end of the log. This tool is intended to 
be invoked from the master failover script(\s-1MHA\s0 Manager), and 
manual execution is normally not needed.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Suppose that master is crashed and the latest slave server has received 
binary logs up to mysqld\-bin.000002:312. It is likely that master has 
more binary logs. If it is not sent to the slave, slaves will lose all 
binlogs from mysqld\-bin.000002:312. The purpose of the save_binary_logs is 
to save binary logs that are not replicated to slaves. If master is reachable 
through \s-1SSH\s0 and binary logs are readable, saving binary logs is possible.
.PP
Here is an example:
.PP
$ save_binary_logs \-\-command=save \-\-start_file=mysqld\-bin.000002 \-\-start_pos=312 \-\-output_file=/var/tmp/aggregate.binlog
.PP
Then all binary logs starting from mysqld\-bin.000002:312 are concatenated
and stored into /var/tmp/aggregate.binlog. If you have binary logs
up to mysqld\-bin.000004, the following mysqlbinlog outputs are written.
.PP
mysqld\-bin.000002:Format Description Event(\s-1FDE\s0), plus from 312 to the tail
mysqld\-bin.000003:from 0 to the tail, excluding \s-1FDE\s0
mysqld\-bin.000004:from 0 to the tail, excluding \s-1FDE\s0