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Question 36/60
Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new application, which heavily reads and writes data.
This requires the following config file options:
Sync_binlog=1
Innodb_flush_log_at_trx_commit=1
Innodb_doublewrite=1
However, this configuration is expected to introduce disk I/O overhead.
What three changes will reduce disk I/O overheads?
This requires the following config file options:
Sync_binlog=1
Innodb_flush_log_at_trx_commit=1
Innodb_doublewrite=1
However, this configuration is expected to introduce disk I/O overhead.
What three changes will reduce disk I/O overheads?
Correct Answer: C,D,E
Explanation/Reference:
C (not A, not B): Use separate disk
Not A: Using symbolic links
This means that, for MyISAM tables, you symlink the index file and data files from their usual location in the data directory to another disk (that may also be striped). This makes both the seek and read times better, assuming that the disk is not used for other purposes as well.
Reference: 8.11.3 Optimizing Disk I/O
C (not A, not B): Use separate disk
Not A: Using symbolic links
This means that, for MyISAM tables, you symlink the index file and data files from their usual location in the data directory to another disk (that may also be striped). This makes both the seek and read times better, assuming that the disk is not used for other purposes as well.
Reference: 8.11.3 Optimizing Disk I/O
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