Theodore Ts'o wrote:
I always liked Sun's approach to this in Online Disk Suite - journal at
the block device level rather than the FS / application level.
Something I haven't seen from the Linux md-utils or DM.
You can do data block journalling in ext3. But the performance impact
can be significant for some work loads. TNSFAAFL.
Sure, but on a large system with a big array, you just move the journal
to a seperate diskset. That can make a big speed improvement for those
types of update patterns where you care about always applying updates
sequentially, such as a filesystem or a database.
Sam.
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