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DATE 2015-05-01

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MESSAGE
DATE 2015-05-06
FROM Ruben
SUBJECT Subject: [LIU Comp Sci] Fwd: Re: [opensuse] Re: no space left on the device
From owner-learn-outgoing-at-mrbrklyn.com Wed May 6 07:45:21 2015
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Date: Wed, 06 May 2015 07:44:54 -0400
From: Ruben
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To: learn-at-nylxs.com, Mohammed Ghriga ,
"Jose A. Rodriguez"
Subject: [LIU Comp Sci] Fwd: Re: [opensuse] Re: no space left on the device
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the stuff I learned this semester is showing up everywhere. All this
stuff I didn't understand before, I now can be in the conversation and
even ask intelligent questions.

Thank you...


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Subject: Re: [opensuse] Re: no space left on the device
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On 05/05/2015 04:48 PM, John Andersen wrote:
> If BTRFS better balanced its trees

Good point but not the best way of putting it.

Having written error correcting disk drivers I know that you can't spend
much time in the kernel doing 'disk work'. A thread that balances the
kernel as reading and writing proceeds is just that and will impact the
user-perceived performance.

Perhaps, since other B-tree based file systems seem to manage this,
there is a fundamental design problem . There are external balance
utilities just as there are FSCK programs for other file systems or
de-fragmentation on MS-DOS file systems that need it (and certain
archaic and rarely used early UNIX file systems).

I'm not saying that BtrFS is "broken by design", but rather that a
design decision is a limitation. I consider the fixed number of inodes
allocated in the ext[234] file systems, something inherited from the
1970s origins of UNIX and only rectified in ReiserFS and XFS and
similar, to be a similar design decision that I see as being a
limitation. It doesn't affect day to day performance until the systems
stops dead, though.

The thing is that you can't really report 'design decision' as bugs,
certain not this late in the game.

I've tried complaining about fixed inodes in ext4 after running into
inode exhaustion, and I was told to "over provision". Now isn't that
what is being said about BtrFS? "Disks is cheap, make the file system
larger, over 100G..."




--
A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting frowned upon?

--
To unsubscribe, e-mail: opensuse+unsubscribe-at-opensuse.org
To contact the owner, e-mail: opensuse+owner-at-opensuse.org




  1. 2015-05-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] debuging methods
  2. 2015-05-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Excellent article on Virtual Paging and OS memory
  3. 2015-05-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Great Article on Software Concordance program writing
  4. 2015-05-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Semephores and what the heck are those things?
  5. 2015-05-03 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Go Language tutorials
  6. 2015-05-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] ACL and beyound security in linux
  7. 2015-05-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: [Perlweekly] #197 - YAPC::EU Master classes - talks - hackathons
  8. 2015-05-05 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Fibonacci trees
  9. 2015-05-05 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Examination Question for Allogorthims
  10. 2015-05-05 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fibonacci trees
  11. 2015-05-05 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Fwd: Internships with Oracle, Amtrak, The Nature Conservancy & more
  12. 2015-05-05 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Nice possible project for NYLXS or others
  13. 2015-05-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Fibonacci trees
  14. 2015-05-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Fibonacci trees
  15. 2015-05-06 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Fibonacci trees
  16. 2015-05-06 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Fwd: Re: [opensuse] Re: no space left on the device
  17. 2015-05-06 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] hashing multiplication
  18. 2015-05-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Kernel Scheduling and wait queues
  19. 2015-05-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: Kernel Scheduler and wiat queues
  20. 2015-05-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: [NYLXS - HANGOUT] Things to study over the summer
  21. 2015-05-08 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Things to study over the summer
  22. 2015-05-10 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] scheduler Slides
  23. 2015-05-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] scheduler Slides
  24. 2015-05-11 Ruben Safir <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] scheduler Slides
  25. 2015-05-11 Ruben Safir <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] scheduler Slides
  26. 2015-05-11 Justin Lau <justinml-at-gmail.com> Re: [LIU Comp Sci] scheduler Slides
  27. 2015-05-11 Justin Lau <justinml-at-gmail.com> Re: [LIU Comp Sci] scheduler Slides
  28. 2015-05-11 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] scheduler Slides
  29. 2015-05-11 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] scheduler Slides
  30. 2015-05-11 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] scheduler Slides
  31. 2015-05-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Job sound like this evenings lectures
  32. 2015-05-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] jobs
  33. 2015-05-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] LAMP Jobs
  34. 2015-05-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] April Journal is Available
  35. 2015-05-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Tomorrow: You and 256 others are going to "Btrfs"
  36. 2015-05-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Malloc systemtap probes: an example
  37. 2015-05-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Stackiq - Educational Program
  38. 2015-05-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Student Lab and Club House
  39. 2015-05-13 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [member-at-linkedin.com: RE: April Journal is Available]
  40. 2015-05-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: Re: [NYLXS - HANGOUT] Things to study over the
  41. 2015-05-14 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Weekly Education Meeting
  42. 2015-05-18 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [jkeen-at-verizon.net: ny.pm Technical Meeting Wed May 20 6:15 pm]
  43. 2015-05-25 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Summer NYLXS Study Schedule
  44. 2015-05-28 Tony Genao <tony.genao-at-my.liu.edu> Re: [LIU Comp Sci] Summer NYLXS Study Schedule
  45. 2015-05-28 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Summer NYLXS Study Schedule
  46. 2015-05-28 Tony Genao <tony.genao-at-my.liu.edu> Re: [LIU Comp Sci] Summer NYLXS Study Schedule
  47. 2015-05-28 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Summer NYLXS Study Schedule
  48. 2015-05-28 Ruben <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: Programming Position
  49. 2015-05-28 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [ruben-at-www.mrbrklyn.com: Linux 1 Book]
  50. 2015-05-31 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Summer NYLXS Study Schedule

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