Feature Request
Samuel Flory
sflory at rackable.com
Thu Jul 24 21:23:40 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.
>
Here is xfs vs ext3 which tends to be even worse for ext3. As reiserfs
really isn't very good with sequential reads and writes. (Still try to
find my reiserfs run with a 3G file size.)
+ rm -f bigfile
+ sync
+ dd if=/dev/zero of=bigfile bs=1024000 count=3072
3072+0 records in
3072+0 records out
real 1m55.554s
user 0m0.010s
sys 0m11.720s
+ sync
real 0m15.709s
user 0m0.000s
sys 0m0.470s
+ dd of=/dev/null if=bigfile bs=1024000
3072+0 records in
3072+0 records out
real 0m54.913s
user 0m0.020s
sys 0m15.140s
+ sync
real 0m0.015s
user 0m0.000s
sys 0m0.010s
+ du -sh bigfile
3.0G 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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