On 11/20/2013 03:45 PM, Craig Ringer wrote:
I'm really concerned by this post on Linux's fsync and disk flush behaviour: http://milek.blogspot.com.au/2010/12/linux-osync-and-write-barriers.html and seeking opinions from folks here who've been deeply involved in write reliability work. The amount of change in write reliablity behaviour in Linux across kernel versions, file systems and storage abstraction layers is worrying - different results for LVM vs !LVM, md vs !md, ext3 vs other, etc. If this isn't something that's already been seen and dealt with then I'll see if I can take a look into it once the RLS work is dealt with.
I thought Greg did some testing on this a while back and determined which versions were safe... (/me looks for post)
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