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Binlog compressed

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Add some event types for the compressed event, there are:
     QUERY_COMPRESSED_EVENT,
     WRITE_ROWS_COMPRESSED_EVENT_V1,
     UPDATE_ROWS_COMPRESSED_EVENT_V1,
     DELETE_POWS_COMPRESSED_EVENT_V1,
     WRITE_ROWS_COMPRESSED_EVENT,
     UPDATE_ROWS_COMPRESSED_EVENT,
     DELETE_POWS_COMPRESSED_EVENT.
These events inheritance the uncompressed editor events. One of their constructor functions and write
function have been overridden for uncompressing and compressing. Anything but this is totally the same.

On slave, The IO thread will uncompress and convert them When it receiving the events from the master.
So the SQL and worker threads can be stay unchanged.

Now we use zlib as compress algorithm. It maybe support other algorithm in the future.
This commit is contained in:
vinchen
2016-10-08 12:07:26 +08:00
committed by Kristian Nielsen
parent 27025221fe
commit 640051e06a
13 changed files with 797 additions and 39 deletions
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6
sql/sql_class.h
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@@ -5681,6 +5681,12 @@ void thd_exit_cond(MYSQL_THD thd, const PSI_stage_info *stage,
#define THD_EXIT_COND(P1, P2) \
thd_exit_cond(P1, P2, __func__, __FILE__, __LINE__)
inline bool binlog_should_compress(ulong len)
{
return opt_bin_log_compress &&
len >= opt_bin_log_compress_min_len;
}
#endif /* MYSQL_SERVER */
#endif /* SQL_CLASS_INCLUDED */