O_DIRECT please; Sybase 12.5
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Quoted 3 lines · Dan Kegel
And what are the chances Sybase will support that flag any time soon? I just read on news://forums.sybase.com/sybase.public.ase.linux
When Sybase always submits its buffers block aligned (same requirement as for raw io) you can do it with a simple LD_PRELOAD hack.
I hacked sapdb (which has source available unlike sybase) to do direct IO and it seems to not hurt at least.
Quoted 4 lines
It supports raw partitions, which is good; that might satisfy my boss (although the administration will be a pain, and I'm not sure whether it's really supported by Dell RAID devices). I'd prefer
O_DIRECT:-(
LVM makes raw partitions much less worse than they used to be. It is basically a file system of raw partitions; allowing you to move and resize them.
-Andi