Feature Request
Samuel Flory
sflory at rackable.com
Thu Jul 24 21:18:03 UTC 2003
Samuel Flory wrote:
> Ethan Bonick wrote:
>
>>
>> I was talking about admin config tools not install time config
>> options. I
>> just want to have more than one choice when installing, you know
>> something
>> like two or three choices. But then how many do you stop at to not have
>> too many but be enough to please most? It's a very complicated issue.
>> I am
>> fine with ext3 being the default journal.
>
>
> I for one am not okay with ext3 as the default, and only journalling
> files system. Let's face it the default ext3 journaling mode is
> extremely slow on writes. As you can see below reiserfs is x2 as fast
> on writes, and x1.5 as fast on reads. Writeback mode isn't much
> better. And ext3 is even worse on random file system access.
Oops wrong set of benchmarks for reiserfs. Let me dig up the correct
set for reiserfs.
>
>
> Reiserfs:
> + dd if=/dev/zero of=bigfile bs=1024000 count=2048
> 2048+0 records in
> 2048+0 records out
>
> real 1m16.632s
> user 0m0.000s
> sys 0m12.580s
> + sync
>
> real 0m24.649s
> user 0m0.000s
> sys 0m0.320s
> + dd of=/dev/null if=bigfile bs=1024000 count=2048
> 2048+0 records in
> 2048+0 records out
>
> real 0m36.065s
> user 0m0.010s
> sys 0m10.690s
> + sync
> + du -sh bigfile
> 2.0G bigfile
>
>
> ext3:
> + dd if=/dev/zero of=bigfile bs=1024000 count=3072
> 3072+0 records in
> 3072+0 records out
>
> real 2m15.430s
> user 0m0.010s
> sys 0m20.900s
> + sync
>
> real 0m32.166s
> user 0m0.000s
> sys 0m0.190s
> + dd of=/dev/null if=bigfile bs=1024000
> 3072+0 records in
> 3072+0 records out
>
> real 0m54.577s
> user 0m0.010s
> sys 0m16.070s
>
>
> ext2 in writeback mode
> + dd if=/dev/zero of=bigfile bs=1024000 count=3072
> 3072+0 records in
> 3072+0 records out
>
> real 2m12.781s
> user 0m0.020s
> sys 0m20.080s
> + sync
>
> real 0m25.971s
> user 0m0.000s
> sys 0m0.300s
> + dd of=/dev/null if=bigfile bs=1024000
> 3072+0 records in
> 3072+0 records out
>
> real 0m55.136s
> user 0m0.020s
> sys 0m15.430s
> + sync
>
> real 0m0.011s
> user 0m0.000s
> sys 0m0.000s
> + du -sh bigfile
> 3.0G bigfile
>
--
Once you have their hardware. Never give it back.
(The First Rule of Hardware Acquisition)
Sam Flory <sflory at rackable.com>
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