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  1. MariaDB Server
  2. MDEV-34750

SET GLOBAL innodb_log_file_size is not crash safe

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    Description

      MDEV-33894 included an inadvertent change that causes SET GLOBAL innodb_log_file_size to write incorrect data to the being-resized log file (ib_logfile101). This does not affect the memory mapped log implementation on 64-bit Linux systems (when the log is stored in a mount -o dax file system or in /dev/shm). As far as I can tell, the fix should be this simple:

      diff --git a/storage/innobase/log/log0log.cc b/storage/innobase/log/log0log.cc
      		 
      index 93f8db6bfc0..84219dbc830 100644
      		 
      --- a/storage/innobase/log/log0log.cc
      		 
      +++ b/storage/innobase/log/log0log.cc
      		 
      @@ -804,7 +804,7 @@ void log_t::resize_write_buf(size_t length) noexcept
      		 
         }
      		 
       
         ut_a(os_file_write_func(IORequestWrite, "ib_logfile101", resize_log.m_file,
      		 
      -                          buf, offset, length) == DB_SUCCESS);
      		 
      +                          resize_flush_buf, offset, length) == DB_SUCCESS);
      		 
       }
      		 
       
       /** Write buf to ib_logfile0.

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          blocks

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34062 mariadb-backup --backup is extremely slow at copying ib_logfile0

          • Major - Major loss of function.
          • Closed
          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35411 innodb.log_file_size_online occasionally fails

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-33894 MariaDB does unexpected storage read IO for the redo log

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34802 Recovery fails to note some log corruption

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. MDEV-34875 provide mechanism to monitor the status of dynamic redo log resize operation

          • Major - Major loss of function.
          • Open

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              marko Marko Mäkelä
              marko Marko Mäkelä
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                Created:
                Updated:
                Resolved:

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