On Tue, 2006-Oct-24 02:21:06 +0200, Ronald Klop wrote: >>On Oct 23, 2006, at 4:44 PM, Mike Jakubik wrote: >>>advanced features, but if they are not used, then what is the >>>advantage? (I really like the InnooDB storage in MySQL)
One nice thing about MySQL is the plethora of backends - you can pick the backend to suit the type of data and access methods. >Example: writing 1 bit on 1 disk needs to read some info from all disks to >recalculate the parity. So this doesn't scale very well. Any sane RAID-5 implementation will regenerate the parity by new_parity = old_parity XOR old_data XOR new_data Though this still turns a single write into 2 reads and 2 writes. Basically: Don't use RAID-5. -- Peter Jeremy
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