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Here comes a nasty patch, although I am not ready to push it yet. I will

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first pull, merge,test, and get it to work.

The main change is the new replication code - now we have two slave threads
SQL thread and I/O thread. I have also re-written a lot of the code to 
prepare for multi-master implementation. 

I also documented IO_CACHE quite extensively and to some extend, THD class.


Makefile.am:
  moved tags target script into a separate file
include/my_sys.h:
  fixes in IO_CACHE for SEQ_READ_APPEND + some documentation
libmysqld/lib_sql.cc:
  updated replication locks, but now I see I did it wrong and it won't compile. Will fix
  before the push.
mysql-test/r/rpl000014.result:
  test result update
mysql-test/r/rpl000015.result:
  test result update
mysql-test/r/rpl000016.result:
  test result update
mysql-test/r/rpl_log.result:
  test result update
mysql-test/t/rpl000016-slave.sh:
  remove relay logs
mysql-test/t/rpl000017-slave.sh:
  remove relay logs
mysql-test/t/rpl_log.test:
  updated test
mysys/mf_iocache.c:
  IO_CACHE updates to make replication work
mysys/mf_iocache2.c:
  IO_CACHE update to make replication work
mysys/thr_mutex.c:
  cosmetic change
sql/item_func.cc:
  new replication code
sql/lex.h:
  new replication
sql/log.cc:
  new replication
sql/log_event.cc:
  new replication
sql/log_event.h:
  new replication
sql/mini_client.cc:
  new replication
sql/mini_client.h:
  new replication
sql/mysql_priv.h:
  new replication
sql/mysqld.cc:
  new replication
sql/repl_failsafe.cc:
  new replication
sql/slave.cc:
  new replication
sql/slave.h:
  new replication
sql/sql_class.cc:
  new replication
sql/sql_class.h:
  new replication
sql/sql_lex.h:
  new replication
sql/sql_parse.cc:
  new replication
sql/sql_repl.cc:
  new replication
sql/sql_repl.h:
  new replication
sql/sql_show.cc:
  new replication
sql/sql_yacc.yy:
  new replication
sql/stacktrace.c:
  more robust stack tracing
sql/structs.h:
  new replication code
BitKeeper/etc/ignore:
  Added mysql-test/r/rpl000002.eval mysql-test/r/rpl000014.eval mysql-test/r/rpl000015.eval mysql-test/r/rpl000016.eval mysql-test/r/slave-running.eval mysql-test/r/slave-stopped.eval to the ignore list
This commit is contained in:
unknown
2002-01-19 19:16:52 -07:00
parent 0831ce1c61
commit 5df61c3cdc
39 changed files with 2464 additions and 1032 deletions
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57
mysys/mf_iocache.c
View File

@ -123,6 +123,8 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
info->pos_in_file= seek_offset;
info->pre_close = info->pre_read = info->post_read = 0;
info->arg = 0;
info->init_count++; /* we assume the user had set it to 0 prior to
first call */
info->alloced_buffer = 0;
info->buffer=0;
info->seek_not_done= test(file >= 0);
@ -447,11 +449,13 @@ int _my_b_seq_read(register IO_CACHE *info, byte *Buffer, uint Count)
info->end_of_file)
goto read_append_buffer;
if (info->seek_not_done)
{ /* File touched, do seek */
VOID(my_seek(info->file,pos_in_file,MY_SEEK_SET,MYF(0)));
info->seek_not_done=0;
}
/*
With read-append cache we must always do a seek before we read,
because the write could have moved the file pointer astray
*/
VOID(my_seek(info->file,pos_in_file,MY_SEEK_SET,MYF(0)));
info->seek_not_done=0;
diff_length=(uint) (pos_in_file & (IO_SIZE-1));
/* now the second stage begins - read from file descriptor */
@ -507,6 +511,13 @@ int _my_b_seq_read(register IO_CACHE *info, byte *Buffer, uint Count)
memcpy(Buffer,info->buffer,(size_t) length);
Count -= length;
Buffer += length;
/*
added the line below to make
DBUG_ASSERT(pos_in_file==info->end_of_file) pass.
otherwise this does not appear to be needed
*/
pos_in_file += length;
goto read_append_buffer;
}
}
@ -528,10 +539,13 @@ read_append_buffer:
/* First copy the data to Count */
uint len_in_buff = (uint) (info->write_pos - info->append_read_pos);
uint copy_len;
uint transfer_len;
DBUG_ASSERT(info->append_read_pos <= info->write_pos);
DBUG_ASSERT(pos_in_file == info->end_of_file);
/*
TODO: figure out if the below assert is needed or correct.
*/
DBUG_ASSERT(pos_in_file == info->end_of_file);
copy_len=min(Count, len_in_buff);
memcpy(Buffer, info->append_read_pos, copy_len);
info->append_read_pos += copy_len;
@ -541,11 +555,12 @@ read_append_buffer:
/* Fill read buffer with data from write buffer */
memcpy(info->buffer, info->append_read_pos,
(size_t) (len_in_buff - copy_len));
(size_t) (transfer_len=len_in_buff - copy_len));
info->read_pos= info->buffer;
info->read_end= info->buffer+(len_in_buff - copy_len);
info->read_end= info->buffer+transfer_len;
info->append_read_pos=info->write_pos;
info->pos_in_file+=len_in_buff;
info->pos_in_file=pos_in_file+copy_len;
info->end_of_file+=len_in_buff;
}
unlock_append_buffer(info);
return Count ? 1 : 0;
@ -887,12 +902,10 @@ int flush_io_cache(IO_CACHE *info)
if ((length=(uint) (info->write_pos - info->write_buffer)))
{
pos_in_file=info->pos_in_file;
if (append_cache)
{
pos_in_file=info->end_of_file;
info->seek_not_done=1;
}
if (info->seek_not_done)
/* if we have append cache, we always open the file with
O_APPEND which moves the pos to EOF automatically on every write
*/
if (!append_cache && info->seek_not_done)
{ /* File touched, do seek */
if (my_seek(info->file,pos_in_file,MY_SEEK_SET,MYF(0)) ==
MY_FILEPOS_ERROR)
@ -902,20 +915,24 @@ int flush_io_cache(IO_CACHE *info)
if (!append_cache)
info->seek_not_done=0;
}
info->write_pos= info->write_buffer;
if (!append_cache)
info->pos_in_file+=length;
info->write_end= (info->write_buffer+info->buffer_length-
((pos_in_file+length) & (IO_SIZE-1)));
/* Set this to be used if we are using SEQ_READ_APPEND */
info->append_read_pos = info->write_buffer;
if (my_write(info->file,info->write_buffer,length,
info->myflags | MY_NABP))
info->error= -1;
else
info->error= 0;
set_if_bigger(info->end_of_file,(pos_in_file+length));
if (!append_cache)
{
set_if_bigger(info->end_of_file,(pos_in_file+length));
}
else
info->end_of_file+=(info->write_pos-info->append_read_pos);
info->append_read_pos=info->write_pos=info->write_buffer;
DBUG_RETURN(info->error);
}
}