Feizhou wrote:
For cases where you do not want to lose your data when you get a blackout. If you do not have a battery power backup for your cache, you will lose data that is in the cache that has not been committed to the disks.
That's what I thought. But, jeez, that's *really* slow. I didn't have the patience to wait for a benchmark to finish but I'm guessing about 5MB/Sec writes. Not acceptable.
Indexes directories are only useful for cases where there are thousands of files in a directory and you want to access a single file (and you know the name in advance) quickly.
That's also what I thought but wasn't sure.
Are you using the no write cache flag with bonnie++? Otherwise you may not get the same results from whatever it is that you are running.
I did *not* run bonnie++ with '-b'. I expect to use write caching in application, so that's what I want to benchmark.
Run XFS without write caching and you should be safe. Are you creating thousands of files?
The main stress on this system will be as a media server (mythtv and some other things.) So, no, files will be fewer and larger. Are you talking about write caching on the 3Ware? As I said, without it the system become unresponsive during large writes.
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