Re: [zfs-discuss] new logbias property
Eric Schrock wrote: On 08/11/09 06:03, Darren J Moffat wrote: I thought so too initially, then I changed my mind and I like it the way it is. The reason being is that describing the intent allows changing the implementation and keeping the meaning. It is the intent that matters to the administrator not the implementation. Also worth noting that is the fact that the use of WR_INDIRECT log writes is altered depending on this property. Even in a pool with no dedicated log devices, changing this property can have an effect on overall performance, so it clearly cannot be defined as simply as use log devices or not. - Eric That's good to know. Eric, Darren - thanks for clarification - it makes sense :) ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] new logbias property
Hi,
I like the new feature but I was thinking that maybe the keywords being used
should be different?
Currently it is:
# zfs set logbias=latency {dataset}
# zfs set logbias=throughput {dataset}
Maybe it would be more clear this way:
# zfs set logdest=dedicated {dataset}
# zfs set logdest=pool {dataset}
or even intentlog={dedicated|pool} ?
IMHO it would better describe what the feature actually does.
--
Robert Milkowski
http://milek.blogspot.com
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Re: [zfs-discuss] new logbias property
Robert Milkowski wrote:
Hi,
I like the new feature but I was thinking that maybe the keywords being used
should be different?
Currently it is:
# zfs set logbias=latency {dataset}
# zfs set logbias=throughput {dataset}
Maybe it would be more clear this way:
# zfs set logdest=dedicated {dataset}
# zfs set logdest=pool {dataset}
or even intentlog={dedicated|pool} ?
IMHO it would better describe what the feature actually does.
I thought so too initially, then I changed my mind and I like it the way
it is. The reason being is that describing the intent allows changing
the implementation and keeping the meaning. It is the intent that
matters to the administrator not the implementation.
--
Darren J Moffat
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Re: [zfs-discuss] new logbias property
On Tue, Aug 11, 2009 at 05:42:31AM -0700, Robert Milkowski wrote:
Hi,
I like the new feature but I was thinking that maybe the keywords being used
should be different?
Currently it is:
# zfs set logbias=latency {dataset}
# zfs set logbias=throughput {dataset}
Maybe it would be more clear this way:
# zfs set logdest=dedicated {dataset}
# zfs set logdest=pool {dataset}
or even intentlog={dedicated|pool} ?
IMHO it would better describe what the feature actually does.
I am not sure if 'logbias' is better then 'logdest' but IMHO
'latency' and 'throughput' is much more intuitive :-)
Regards
Przemyslaw Bak (przemol)
--
http://przemol.blogspot.com/
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Wybierz dziewczyne lub chlopaka lata!
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Re: [zfs-discuss] new logbias property
przemol...@poczta.fm wrote:
On Tue, Aug 11, 2009 at 05:42:31AM -0700, Robert Milkowski wrote:
Hi,
I like the new feature but I was thinking that maybe the keywords being used
should be different?
Currently it is:
# zfs set logbias=latency {dataset}
# zfs set logbias=throughput {dataset}
Maybe it would be more clear this way:
# zfs set logdest=dedicated {dataset}
# zfs set logdest=pool {dataset}
or even intentlog={dedicated|pool} ?
IMHO it would better describe what the feature actually does.
I am not sure if 'logbias' is better then 'logdest' but IMHO
'latency' and 'throughput' is much more intuitive :-)
That would make sense though, eg:
logdest=latency|throughput
Which is why it is logbias, it isn't the destination of the log that is
latency or throughput but the bias.
--
Darren J Moffat
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Re: [zfs-discuss] new logbias property
On 08/11/09 06:03, Darren J Moffat wrote: I thought so too initially, then I changed my mind and I like it the way it is. The reason being is that describing the intent allows changing the implementation and keeping the meaning. It is the intent that matters to the administrator not the implementation. Also worth noting that is the fact that the use of WR_INDIRECT log writes is altered depending on this property. Even in a pool with no dedicated log devices, changing this property can have an effect on overall performance, so it clearly cannot be defined as simply as use log devices or not. - Eric -- Eric Schrock, Fishworkshttp://blogs.sun.com/eschrock ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
