Groups > comp.lang.java.programmer > #6875

Re: A quota based lock

From	markspace <-@.>
Newsgroups	comp.lang.java.programmer
Subject	Re: A quota based lock
Date	2011-08-08 11:57 -0700
Organization	A noiseless patient Spider
Message-ID	<j1pbj1$hvd$1@dont-email.me> (permalink)
References	<83f81158-8aee-486d-a51b-c0f7dfdbb0da@h25g2000prf.googlegroups.com> <j1oj30$tut$1@dont-email.me> <j1p40f$jua$1@dont-email.me> <j1p4n8$pog$1@dont-email.me> <j1pago$8ua$1@dont-email.me>

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On 8/8/2011 11:39 AM, Knute Johnson wrote:

> No priority scheme will ever be truly fair. I'll bet you could get
> pretty close without being too complicated. I'll think about it some more.

A simple priority system might involve multiple queues, where the high 
priority queues are serviced X times more than the lower ones.

E.g., two queues.  Queue A gets 10 jobs executed for each 1 job that 
queue B gets executed.  But because queue B is always guaranteed to be 
serviced eventually, there is no starvation.

This is a simple step up from round-robin service (which is what Eric 
proposed).  There are many algorithms existing.  Check out any text on 
OSs and job scheduling.

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A quota based lock Robert Stark <panxiaozhong@gmail.com> - 2011-08-08 00:13 -0700
  Re: A quota based lock Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-08-08 07:58 -0400
    Re: A quota based lock Knute Johnson <september@knutejohnson.com> - 2011-08-08 09:48 -0700
      Re: A quota based lock markspace <-@.> - 2011-08-08 10:00 -0700
        Re: A quota based lock Knute Johnson <september@knutejohnson.com> - 2011-08-08 11:39 -0700
          Re: A quota based lock markspace <-@.> - 2011-08-08 11:57 -0700
            Re: A quota based lock Robert Klemme <shortcutter@googlemail.com> - 2011-08-08 21:46 +0200
              Re: A quota based lock Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-08-08 20:41 -0400
                Re: A quota based lock Robert Klemme <shortcutter@googlemail.com> - 2011-08-10 09:36 +0200
                Re: A quota based lock Robert Stark <panxiaozhong@gmail.com> - 2011-08-10 04:40 -0700
                Re: A quota based lock Robert Klemme <shortcutter@googlemail.com> - 2011-08-10 18:55 +0200
                Re: A quota based lock Martin Gregorie <martin@address-in-sig.invalid> - 2011-08-10 19:26 +0000
                Re: A quota based lock Patricia Shanahan <pats@acm.org> - 2011-08-10 12:37 -0700
                Re: A quota based lock Robert Stark <panxiaozhong@gmail.com> - 2011-08-10 18:30 -0700
                Re: A quota based lock markspace <-@.> - 2011-08-10 19:17 -0700
                Re: A quota based lock Robert Klemme <shortcutter@googlemail.com> - 2011-08-11 12:32 +0200
          Re: A quota based lock Tom Anderson <twic@urchin.earth.li> - 2011-08-09 21:00 +0100
  Re: A quota based lock markspace <-@.> - 2011-08-08 07:58 -0700
  Re: A quota based lock Tom Anderson <twic@urchin.earth.li> - 2011-08-09 21:45 +0100

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