SLC vs. MLC

By: Linus Torvalds (torvalds.delete@this.linux-foundation.org), September 10, 2008 7:25 am
Room: Moderated Discussions
Michael S (already5chosen@yahoo.com) on 9/10/08 wrote:
>
>For normal usage write latency doesn't matter at all.

This is absolutely not true!

It's a common mistake to think this, but the fact is,
write latency - even for individual IOs - can matter a
lot.

You are right to a point that it doesn't matter for normal
write-backs that are all totally buffered, but:

- most hardware interfaces have quite limited queues.

For example, if you're a SATA disk, the number of
outstanding writes to the disk is usually in the low
tens (ie 16-32). It can be lower.

This means that if you have a GC event that means that
writes will basically hit a roadblock for tens or even
hundreds of milliseconds, then if any writeback is
going on, then totally unrelated reads will also
be blocked, simply because there are no more entries in
the hardware queue.

Yes, you can limit the number of outstanding writes to
less than the number of hw queue entries, but nobody
does that because it would hurt throughput quite a lot.

- even if you never hit the above issue (and you will),
there are many operations that effectively require
synchronous writes.

This will commonly happen for certain metadata (it does
depend on the filesystem a lot), but it will also happen
for perfectly regular data when the user asks for a
sync write. And no, it's not at all "special" to do that.

Every single sane mail reader will do it, to make sure
that email won't be lost in case of a data loss. A lot
of editors will do it for the same reason. Anybody who
uses a database will do it, and many databases will have
a huge hiccup if the writes bunch up due to GC events.

And what uses databases? Pretty much everything. Look
at Firefox-3. It puts all your browsing history, and all
your preferences, and all your caches in one single
database, and then because the database engine thinks it
is all so horibly important (and the FF people were
silly enough to do so too), it will write much of it out
synchronously. Causing huge delays when the file
system must flush the whole log.

Really. None of the above issues are even remotely
odd or uncommon, even for very standard desktop operations
(and that's when you'll notice half-second pauses very very
clearly indeed!).

So single-write latency very much absolutely does matter.

And yes, you can put a RAM buffer on the SSD, have a cap
to give it time to flush even in the case of power loss,
return "success" early from the write, and yes, people
actually do that. But no, it doesn't actually help
at all for the event of something like a GC cycle causing
a few hundred ms of delays.

Why? Because when that happens, al writes will be
buffered up, and it will just move the point (slightly)
at which point the thing is stuck. It can hide the problem
under light load, but not under any kind of real
write-back event.

>Write latency doesn't matter so much that application
>program has no easy way to measure it.

Sadly, a lot of people seem to think like you. The whole
FF thing was a total disaster. Now, admittedly, it was
largely just the FF people being totally stupid, and just
thinking that databases are wonderful, but that in turn
was because people don't understand these issues!

>The only case where write latency matters is a data
>retention during sudden loss of power, but that's vendor's
>problem, not ours. At least I hope so.

See above: your buffers will fill up.

And if you think a few hundred ms is unrealistic for a
GC event, you're very naive! Even with much faster
RAM, even with much smaller data sets, GC events can take
seconds to complete if you do them badly. From the
timings I've seen of the OCZ SSD's (which actually perform
really well on average), when it hits a wall, it really
does hit a wall, ie latencies really are in the
second range, not milliseconds.

(To some degree, GC on a SSD is slightly simpler than GC on
some generic RAM allocation, since you have fixed 512-byte
blocks rather than any random size. But on the other hand,
the whole erase cycle thing introduces complexities all its
own, so I suspect it's all pretty nasty).

>Random writes throughput is something we could measure
>with relative ease, That tells as that, unlike write
>latency, random writes throughput could be practically
>important.

I do not know why you link "ease of measurement" with the
concept of "importance". Why do you link the two?

Yes, write-back performance is much harder to measure, but
that's because it's asynchronous, not because it's
not important.

And things like hiccups in sync write latencies are harder
to measure because they have very non-obvious patterns, to
the point of being almost random (ie it will depend on
other load issues like how much data is queued up in the
system, and where the GC event happens, etc etc).

And yes, latency in general is much harder to measure
well than throughput. For throughput, you just time the
start and the end, and divide by the amount of work. But
measuring latency means having to have lots and lots of
timing points over the whole workload, and doing some real
analysis to see where maxima are etc.

So yes, throughput is much much easier to measure. But then
thinking that that means that it is more important is really
misguided. When you actually use a desktop, I will
guarantee you that what ends up irritating you will
almost always be the latency issues, not the throughput.

Really.

Linus
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TopicPosted ByDate
First Dunnington benchmark resultsMichael S2008/08/19 10:54 AM
  First Dunnington benchmark resultsrwessel2008/08/19 01:42 PM
    First Dunnington benchmark resultsAaron Apink2008/08/19 05:49 PM
      First Dunnington benchmark resultsJoe Chang2008/08/19 06:28 PM
        First Dunnington benchmark resultsrwessel2008/08/21 09:49 AM
          First Dunnington benchmark resultsJoe Chang2008/08/21 03:10 PM
            First Dunnington benchmark resultsrwessel2008/08/21 06:42 PM
              First Dunnington benchmark resultsJoe Chang2008/08/21 07:12 PM
      First Dunnington benchmark resultsrwessel2008/08/21 09:45 AM
        First Dunnington benchmark resultsAaron Spink2008/08/21 01:12 PM
          First Dunnington benchmark resultsJoe Chang2008/08/21 03:15 PM
    First Dunnington benchmark resultsRichard Cownie2008/08/20 02:59 AM
      First Dunnington benchmark resultsAnders Jensen2008/08/20 03:26 AM
        +SSDAnders Jensen2008/08/20 03:30 AM
        First Dunnington benchmark resultsRichard Cownie2008/08/20 11:04 AM
          First Dunnington benchmark resultsslacker2008/08/20 12:35 PM
            First Dunnington benchmark resultsDoug Siebert2008/08/20 07:54 PM
              First Dunnington benchmark resultsRichard Cownie2008/08/20 08:58 PM
                SLC vs. MLCDavid Kanter2008/08/21 01:16 AM
                  SLC vs. MLCMatt Sayler2008/08/21 06:25 AM
                  SLC vs. MLCRichard Cownie2008/08/21 06:32 AM
                    SLC vs. MLCLinus Torvalds2008/08/21 08:39 AM
                      SLC vs. MLCMichael S2008/08/21 09:07 AM
                        SLC vs. MLCLinus Torvalds2008/08/21 09:52 AM
                          SLC vs. MLCMichael S2008/08/21 10:35 AM
                            OLTP appliance = mainframe? (NT)Potatoswatter2008/08/21 11:44 AM
                              OLTP appliance = HP NonStop?Michael S2008/08/21 12:03 PM
                                OLTP applianceJoe Chang2008/08/21 03:33 PM
                                  OLTP appliancePotatoswatter2008/08/21 03:59 PM
                            SLC vs. MLCAaron Spink2008/08/21 01:29 PM
                          SLC vs. MLCDan Downs2008/08/21 11:33 AM
                            SLC vs. MLCrwessel2008/08/21 12:45 PM
                              SLC vs. MLCDan Downs2008/08/22 08:21 AM
                            SLC vs. MLCAaron Spink2008/08/21 01:34 PM
                          SLC vs. MLC vs DRAMpgerassi2008/08/21 12:24 PM
                            SLC vs. MLC vs DRAMDavid Kanter2008/08/22 01:31 AM
                          SLC vs. MLCGroo2008/08/23 12:52 PM
                      SLC vs. MLCDoug Siebert2008/08/21 06:14 PM
                        SLC vs. MLCLinus Torvalds2008/08/22 08:05 AM
                          SLC vs. MLCDoug Siebert2008/08/22 02:27 PM
                            SLC vs. MLCEduardoS2008/08/22 06:26 PM
                            SSD Controller differentiationDavid Kanter2008/08/22 09:35 PM
                              SSD Controller differentiationDoug Siebert2008/08/22 10:34 PM
                                SSD Controller differentiation (supercaps, cost...)anon2008/08/23 10:18 AM
                                  SSD Controller differentiation (supercaps, cost...)Doug Siebert2008/08/23 10:40 AM
                            SLC vs. MLCLinus Torvalds2008/08/23 10:50 AM
                              SLC vs. MLCLinus Torvalds2008/09/08 12:03 PM
                                SLC vs. MLCMax2008/09/08 01:51 PM
                                  SLC vs. MLCHoward Chu2008/09/08 09:04 PM
                                    SLC vs. MLCMax2008/09/08 10:29 PM
                                      SLC vs. MLCHoward Chu2008/09/09 12:12 AM
                                        RAM vs SSD?Jouni Osmala2008/09/09 01:06 AM
                                          RAM vs SSD?Max2008/09/12 12:51 PM
                                            RAM vs SSD?EduardoS2008/09/12 04:27 PM
                                            Disk cache snapshottingMax2008/09/13 08:34 AM
                                              Disk cache snapshottingHoward Chu2008/09/14 09:58 PM
                                                Disk cache snapshottingMax2008/09/15 12:50 PM
                                        SLC vs. MLCLinus Torvalds2008/09/09 07:43 AM
                                          SLC vs. MLCHoward Chu2008/09/09 09:42 AM
                                            SLC vs. MLCLinus Torvalds2008/09/09 10:39 AM
                                              SLC vs. MLCMichael S2008/09/10 12:29 AM
                                                SLC vs. MLCanon2008/09/10 02:51 AM
                                                  SLC vs. MLCMichael S2008/09/10 03:09 AM
                                                    SLC vs. MLCMax2008/09/10 04:48 AM
                                                      SLC vs. MLCMichael S2008/09/10 05:52 AM
                                                        SLC vs. MLCMax2008/09/10 06:28 AM
                                                    SLC vs. MLCMatt Sayler2008/09/10 06:21 AM
                                                      SLC vs. MLCMichael S2008/09/10 09:17 AM
                                                    SLC vs. MLCanon2008/09/10 06:29 AM
                                                      SLC vs. MLCMichael S2008/09/10 09:23 AM
                                                        SLC vs. MLCMatt Sayler2008/09/10 10:45 AM
                                                SLC vs. MLCLinus Torvalds2008/09/10 07:25 AM
                                                  SLC vs. MLCMichael S2008/09/10 09:54 AM
                                                    SLC vs. MLCLinus Torvalds2008/09/10 10:31 AM
                                                      Physical vs effective write latencyMax2008/09/11 07:35 AM
                                                        Physical vs effective write latencyLinus Torvalds2008/09/11 09:06 AM
                                                          Physical vs effective write latencyLinus Torvalds2008/09/11 09:48 AM
                                                            Physical vs effective write latencyLinus Torvalds2008/09/11 11:39 AM
                                                              Physical vs effective write latencyMark Roulo2008/09/11 12:18 PM
                                                                Physical vs effective write latencyDoug Siebert2008/09/11 05:59 PM
                                                                  Physical vs effective write latencyLinus Torvalds2008/09/11 07:16 PM
                                                                    Physical vs effective write latencyDoug Siebert2008/09/11 10:28 PM
                                                        Physical vs effective write latencyMS2009/02/03 03:06 PM
                                                  SLC vs. MLC - the trick to latencyAnonymous2008/09/11 12:39 PM
                                                    SLC vs. MLC - the trick to latencyanon2008/09/11 01:17 PM
                                                      SLC vs. MLC - the trick to latencyAnonymous2008/09/11 05:25 PM
                                                        SLC vs. MLC - the trick to latencyDoug Siebert2008/09/11 05:47 PM
                                                          SLC vs. MLC - the trick to latencyrwessel2008/09/11 06:01 PM
                                                        SLC vs. MLC - the trick to latencyanon2008/09/12 12:00 AM
                                                          SLC vs. MLC - the trick to latencyAnonymous2008/09/12 08:52 PM
                                                            SLC vs. MLC - the trick to latencyanon2008/09/13 10:06 AM
                                                            SLC vs. MLC - the trick to latencyUngo2008/09/15 12:18 PM
                                                              To SSD or not? One lady's perspectiveDavid Kanter2008/09/22 01:12 AM
                                                                To SSD or not? One lady's perspectiveHoward Chu2008/09/22 04:02 AM
                                                                  To SSD or not? Real data..Linus Torvalds2008/09/22 07:33 AM
                                                                    To SSD or not? Real data..Ungo2008/09/22 12:27 PM
                                                                      4K sectorsWes Felter2008/09/22 06:03 PM
                                                                        4K sectorsDaniel2008/09/22 10:31 PM
                                                                      Reasons for >512 byte sectorsDoug Siebert2008/09/22 09:38 PM
                                                                        Reasons for >512 byte sectorsrwessel2008/09/22 10:09 PM
                                                                          Reasons for >512 byte sectorsHoward Chu2008/09/23 02:50 AM
                                                                        Reasons for >512 byte sectorsDaniel2008/09/22 10:40 PM
                                                                          Reasons for >512 byte sectorsrwessel2008/09/23 09:11 AM
                                                                            Reasons for >512 byte sectorsDaniel2008/09/23 12:10 PM
                                                                      HDD long sector size availabilityEtienne Lehnart2008/09/23 05:32 AM
                                                                        HDD long sector size availabilityrwessel2008/09/23 09:19 AM
                                                                          HDD long sector size availabilityEtienne Lehnart2008/09/23 02:17 PM
                                                                    To SSD or not? Real data..Jouni Osmala2008/09/22 11:16 PM
                                                                  To SSD or not? One lady's perspectiveWes Felter2008/09/22 11:25 AM
                                                                How should SSDs be engineered into systems?Rob Thorpe2008/09/22 02:01 PM
                                                                  How should SSDs be engineered into systems?Matt Craighead2008/09/23 06:59 PM
                                                                    How should SSDs be engineered into systems?Matt Sayler2008/09/24 04:17 AM
                                                            ATA/SCSIS, Write Flushes and Asych FilesystemsTruePath2009/01/25 04:44 AM
                                                        SLC vs. MLC - the trick to latencyMichael S2008/09/12 04:58 AM
                                                        overlapped erase and read Michael S2008/09/12 04:59 AM
                                                          overlapped erase and read David W. Hess2008/09/12 09:56 AM
                                                          overlapped erase and read Anonymous2008/09/12 08:45 PM
                                                            overlapped erase and read Jouni Osmala2008/09/12 11:56 PM
                                                            overlapped erase and read Michael S2008/09/13 11:29 AM
                                                            overlapped erase and read Michael S2008/09/13 12:09 PM
                                                              overlapped erase and read Linus Torvalds2008/09/13 02:05 PM
                                                    SLC vs. MLC - the trick to latencyDoug Siebert2008/09/11 05:31 PM
                                SLC vs. MLCEduardoS2008/09/08 02:07 PM
                                  SLC vs. MLCLinus Torvalds2008/09/08 02:30 PM
                                    SLC vs. MLCEduardoS2008/09/08 04:01 PM
                                      SSD and RAIDJoe Chang2008/09/08 07:42 PM
                                        SSD and RAIDDoug Siebert2008/09/08 09:46 PM
                                          SSD and RAIDAaron Spink2008/09/09 04:27 PM
                                            SSD and RAIDGroo2008/09/10 01:02 PM
                              SLC vs. MLCJoern Engel2009/01/06 10:22 AM
                                SLC vs. MLCLinus Torvalds2009/01/06 02:04 PM
                                  SLC vs. MLCJoern Engel2009/01/06 03:24 PM
                                    SLC vs. MLCrwessel2009/01/06 04:47 PM
                                      SLC vs. MLCanonymous2009/01/06 05:17 PM
                                        SLC vs. MLCrwessel2009/01/06 05:58 PM
                                      SLC vs. MLCJoern Engel2009/01/07 12:35 AM
                                    SLC vs. MLCLinus Torvalds2009/01/06 05:45 PM
                                      SLC vs. MLCrwessel2009/01/06 06:09 PM
                                        SLC vs. MLCLinus Torvalds2009/01/06 07:47 PM
                                      SLC vs. MLCJoern Engel2009/01/07 12:26 AM
                                    SLC vs. MLCanon2009/01/06 08:23 PM
                                      SLC vs. MLCJoern Engel2009/01/07 12:52 AM
                                        SLC vs. MLCanon2009/01/07 02:34 AM
                                  SLC vs. MLCIntelUser20002009/01/07 07:43 AM
                                    SLC vs. MLCLinus Torvalds2009/01/07 10:28 AM
                                      drop data filesystem semanticDoug Siebert2009/01/09 12:21 PM
                                      FTL and FSiz2009/01/09 07:49 PM
                                        FTL and FSLinus Torvalds2009/01/09 09:53 PM
                                          FTL and FSiz2009/01/10 02:09 AM
                                            FTL and FSMichael S2009/01/10 03:19 PM
                                              compiling large programsiz2009/01/10 05:51 PM
                                                compiling large programsLinus Torvalds2009/01/10 07:58 PM
                                                  compiling large programspeter2009/01/11 05:30 AM
                                                  compiling large programsAndi Kleen2009/01/11 01:03 PM
                                                  The File AbstractionTruePath2009/01/25 06:45 AM
                                                    The File AbstractionHoward Chu2009/01/25 01:49 PM
                                                      The File AbstractionLinus Torvalds2009/01/26 09:23 AM
                                                        The File AbstractionMichael S2009/01/26 01:39 PM
                                                          The File AbstractionLinus Torvalds2009/01/26 02:31 PM
                                                            The File AbstractionDean Kent2009/01/26 03:06 PM
                                                              The File AbstractionLinus Torvalds2009/01/26 04:29 PM
                                                                The File AbstractionMark Christiansen2009/01/27 09:24 AM
                                                                  The File AbstractionMark Christiansen2009/01/27 10:14 AM
                                                                  The File AbstractionLinus Torvalds2009/01/27 10:15 AM
                                                                    The File Abstractionslacker2009/01/27 11:20 AM
                                                                      The File AbstractionLinus Torvalds2009/01/27 01:16 PM
                                                                        Attributes All The Way DownMark Christiansen2009/01/27 02:17 PM
                                                                        The File Abstractionslacker2009/01/27 05:25 PM
                                                                          The File AbstractionLinus Torvalds2009/01/28 08:17 AM
                                                                            The File Abstraction: API thoughtsCarlie Coats2009/01/28 09:35 AM
                                                                            The File Abstractionslacker2009/01/28 10:09 AM
                                                                              The File AbstractionLinus Torvalds2009/01/28 01:44 PM
                                                                                Programs already 'hide' their metadata in the bytestream, unbeknownst to usersanon2009/01/28 09:28 PM
                                                                                The File Abstractionslacker2009/01/29 10:39 AM
                                                                                  The File AbstractionLinus Torvalds2009/01/29 11:08 AM
                                                                                    The File AbstractionDean Kent2009/01/29 11:49 AM
                                                                                      The File AbstractionHoward Chu2009/01/29 02:58 PM
                                                                                        The File Abstractionrwessel2009/01/29 04:23 PM
                                                                                    Extended Attributes in Actionslacker2009/01/29 03:05 PM
                                                                                      Extended Attributes in Actionstubar2009/01/29 04:49 PM
                                                                                      Extended Attributes in ActionLinus Torvalds2009/01/29 05:15 PM
                                                                                        Like Duhanon2009/01/29 07:42 PM
                                                                                          Like Duhanon2009/01/29 09:15 PM
                                                                                            Like Duhanon2009/02/01 07:18 PM
                                                                                              Double Duh.Anonymous2009/02/01 10:58 PM
                                                                                                Double Duh.anon2009/02/02 02:08 AM
                                                                                                  Double Duh.Anonymous2009/02/02 05:11 PM
                                                                                                    Double Duh.anon2009/02/02 07:33 PM
                                                                                              Like DuhDavid Kanter2009/02/01 11:05 PM
                                                                                                Like Duhpeter2009/02/01 11:55 PM
                                                                                                Like Duhanon2009/02/02 01:55 AM
                                                                                                Xattrs, Solar power, regulation and politicsRob Thorpe2009/02/02 04:36 AM
                                                                                                  Terminology seems too fuzzy to mehobold2009/02/02 06:14 AM
                                                                                                    Terminology seems too fuzzy to merwessel2009/02/02 12:33 PM
                                                                                                      good summaryMichael S2009/02/03 02:41 AM
                                                                                                        good summaryMark Christiansen2009/02/03 09:57 AM
                                                                                                          good summaryHoward Chu2009/02/03 10:21 AM
                                                                                                            good summaryMark Christiansen2009/02/03 11:18 AM
                                                                                                              good summaryHoward Chu2009/02/03 12:00 PM
                                                                                                                good summaryMark Christiansen2009/02/03 12:36 PM
                                                                                                          good summaryRagingDragon2009/02/03 10:39 PM
                                                                                                            good summaryrwessel2009/02/03 11:03 PM
                                                                                                              good summaryRagingDragon2009/02/03 11:46 PM
                                                                                                      Terminology seems too fuzzy to meslacker2009/02/04 05:06 PM
                                                                                                        Terminology seems too fuzzy to meMichael S2009/02/05 01:05 AM
                                                                                                          Terminology seems too fuzzy to meUngo2009/02/05 01:15 PM
                                                                                                          Terminology seems too fuzzy to meslacker2009/02/05 02:19 PM
                                                                                                            Terminology seems too fuzzy to meHoward Chu2009/02/05 04:44 PM
                                                                                          Like Duhiz2009/01/30 02:03 AM
                                                                                          EAs (security labels) hosed me badlyanon2009/01/30 09:48 PM
                                                                                        Extended Attributes in ActionRagingDragon2009/01/29 09:31 PM
                                                                                      Extended Attributes in Actionanonymous2009/01/29 08:13 PM
                                                                                      Extended Attributes in ActionHoward Chu2009/01/29 09:38 PM
                                                                                        Extended Attributes in Actionslacker2009/01/30 11:24 AM
                                                                                          Extended Attributes in Actionanon2009/01/30 05:50 PM
                                                                                      Extended Attributes in ActionEtienne Lehnart2009/01/30 12:22 AM
                                                                                      Extended Attributes in ActionRob Thorpe2009/01/30 12:39 PM
                                                                                        Extended Attributes in Actionslacker2009/01/30 01:16 PM
                                                                                          Extended Attributes in Actionanon2009/01/30 06:03 PM
                                                                                          Extended Attributes in ActionHoward Chu2009/01/30 11:22 PM
                                                                                            Extended Attributes in Actionrwessel2009/01/31 12:08 AM
                                                                                              Extended Attributes in Actionanonymous2009/01/31 12:22 AM
                                                                                                Extended Attributes in Actionrwessel2009/01/31 12:56 AM
                                                                                                  ScalingDean Kent2009/01/31 09:04 AM
                                                                                                    ScalingRob Thorpe2009/02/02 02:39 AM
                                                                                                      Scalingrwessel2009/02/02 11:41 AM
                                                                                                        ScalingHoward Chu2009/02/02 12:30 PM
                                                                                                          ScalingDean Kent2009/02/02 02:27 PM
                                                                                                            ScalingRob Thorpe2009/02/03 05:08 AM
                                                                                                              ScalingDean Kent2009/02/03 07:38 AM
                                                                                                              Scalingrwessel2009/02/03 02:34 PM
                                                                                                                ScalingRagingDragon2009/02/03 10:46 PM
                                                                                                    in defense of software that does not scaleMatt Sayler2009/02/03 11:27 AM
                                                                                                      in defense of software that does not scaleHoward Chu2009/02/03 12:03 PM
                                                                                                        in defense of software that does not scaleMatt Sayler2009/02/03 12:17 PM
                                                                                                        in defense of software that does not scaleRagingDragon2009/02/03 11:00 PM
                                                                                                          in defense of software that does not scaleMichael S2009/02/04 06:46 AM
                                                                                                            in defense of software that does not scaleRagingDragon2009/02/04 09:33 PM
                                                                                                      in defense of software that does not scaleDean Kent2009/02/03 12:17 PM
                                                                                                        in defense of software that does not scaleMatt Sayler2009/02/03 12:24 PM
                                                                                                        in defense of software that does not scaleVincent Diepeveen2009/02/04 10:43 AM
                                                                                                      in defense of software that does not scalerwessel2009/02/03 02:44 PM
                                                                                                        in defense of software that does not scaleanon2009/02/04 02:35 AM
                                                                                                          in defense of software that does not scaleCarlie Coats2009/02/04 05:24 AM
                                                                                                      Scaling with time vs. scaling from the beginning.mpx2009/02/05 01:57 AM
                                                                                                  Extended Attributes in ActionMichael S2009/01/31 10:33 AM
                                                                                                  Extended Attributes in Actionanon2009/01/31 10:37 PM
                                                                                          Extended Attributes in ActionJasonB2009/01/31 08:11 AM
                                                                                            Extended Attributes in ActionHoward Chu2009/01/31 11:43 AM
                                                                                              Extended Attributes in ActionJasonB2009/01/31 04:37 PM
                                                                                                Extended Attributes in ActionHoward Chu2009/02/02 02:42 PM
                                                                                                  Extended Attributes in ActionHoward Chu2009/02/02 02:44 PM
                                                                    The File AbstractionRob Thorpe2009/01/27 11:20 AM
                                                              The File AbstractionHoward Chu2009/01/27 12:28 AM
                                                                The File AbstractionMichael S2009/01/27 03:00 AM
                                                                The File AbstractionDean Kent2009/01/27 08:30 AM
                                                        The File AbstractionAndi Kleen2009/01/27 02:05 AM
                                  SLC vs. MLCMichel2009/01/12 06:54 PM
                                    SLC vs. MLCLinus Torvalds2009/01/12 07:38 PM
                                      SLC vs. MLCrwessel2009/01/13 12:52 AM
                                      SLC vs. MLCUngo2009/01/13 03:04 PM
                                        SLC vs. MLCWes Felter2009/01/13 05:42 PM
                                      SLC vs. MLCTruePath2009/01/25 05:05 AM
                    SLC vs. MLCUngo2008/08/21 12:54 PM
                    SLC vs. MLCAaron Spink2008/08/21 01:20 PM
                  MLC vs. SLCMichael S2008/08/21 08:57 AM
                First Dunnington benchmark resultsrwessel2008/08/21 10:40 AM
              First Dunnington benchmark resultsAaron Spink2008/08/21 03:18 AM
      First Dunnington benchmark resultsEtienne Lehnart2008/08/20 04:38 AM
  Will x86 dominate big iron?Tom W2008/08/19 10:10 PM
    Will x86 dominate big iron?Jesper Frimann2008/08/20 12:28 AM
      Will x86 dominate big iron?Tom W2008/08/20 03:42 PM
        Will x86 dominate big iron?David Kanter2008/08/21 01:13 AM
          Will x86 dominate big iron?Joe Chang2008/08/21 06:54 AM
            Will x86 dominate big iron?asdf2008/08/22 01:18 PM
              Will x86 dominate big iron?Dean Kent2008/08/22 07:54 PM
        Will x86 dominate big iron?Jesper Frimann2008/08/22 09:48 AM
          Will x86 dominate big iron?Tom W2008/08/24 01:06 AM
            Will x86 dominate big iron?Michael S2008/08/24 04:19 AM
              Will x86 dominate big iron?Dean Kent2008/08/24 09:30 AM
                Will x86 dominate big iron?Paul2008/08/24 11:16 AM
                  Will x86 dominate big iron?Dean Kent2008/08/24 12:37 PM
                Will x86 dominate big iron?Michael S2008/08/25 12:53 AM
        Will x86 dominate big iron?someone2008/08/22 10:19 AM
          Will x86 dominate big iron?aaron spink2008/08/23 02:56 AM
            Will x86 dominate big iron?Michael S2008/08/23 09:58 AM
              Will x86 dominate big iron?someone2008/08/23 01:51 PM
            Will x86 dominate big iron?someone2008/08/23 01:55 PM
              Will x86 dominate big iron?Aaron Spink2008/08/23 04:52 PM
                Will x86 dominate big iron?anonymous2008/08/23 05:28 PM
                  Will x86 dominate big iron?Dean Kent2008/08/23 06:12 PM
                    Off road and topicEduardoS2008/08/23 06:28 PM
                  Will x86 dominate big iron?someone2008/08/23 06:26 PM
                    Will x86 dominate big iron?Dean Kent2008/08/23 09:40 PM
                    Will x86 dominate big iron?anonymous2008/08/24 01:46 AM
                  Off road and topicDavid W. Hess2008/08/24 03:24 AM
                    Off road and topicAaron Spink2008/08/24 04:14 AM
  Beckton vs. DunningtonMr. Camel2008/08/22 06:30 AM
    Beckton vs. Dunningtonjokerman2008/08/22 12:12 PM
    Beckton vs. DunningtonMr. Camel2009/05/29 10:16 AM
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How do you spell green?