Messages in this thread |  | | From | Stefan Hoffmeister <> | Subject | Bandwidth QoS for disks? | Date | Sat, 27 Oct 2001 14:34:43 +0200 |
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Hi,
is there anything in the kernel that would allow an application to *declare* that it needs disk read (or possibly) write bandwidth of n KB/s?
The kernel would make every attempt to deliver that bandwidth, even allowing starvation of other less important clients, except for some 5-10% headroom for emergency? I realise that the kernel cannot *guarantee* that bandwidth, but some kind of priorization scheme would help often enough, I guess.
I just lost another CD-R due to cron with lots and lots of on-disk seeking kicking in, killing all that bandwidth cdrecord needed - and I don't have one of these new and fancy burn-proof things (and, yes, I should have suspended cron and friends, but I am only human and computers are meant to made my life easier).
Sure, I could instruct cdrecord to increase its own read-ahead cache from 4 MB to, say, 128 MB. But read-ahead cache != "QoS" (except for volume of data == size of read-ahead cache), only a lame attempt at, well, being helpful in an imperfect world. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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