From: Edward Shishkin <edward@namesys.com>
To: Pysiak Satriani <pysiak.satriani@wp.pl>
Cc: reiserfs-list@namesys.com
Subject: Re: reiser4.1
Date: Thu, 03 Mar 2005 03:09:01 -0800 [thread overview]
Message-ID: <4226F04D.2090303@namesys.com> (raw)
In-Reply-To: <37288019.20050303095520@wp.pl>
Pysiak Satriani wrote:
>Hi
>
>
>
>>Compression is what will be in 4.1, not the repacker. At least, I hope
>>edward gets it done soon.....
>>
>>
>I've read an interview with Hans in the polish edition of Chip Special some
>time ago.
>I remember Hans saying that nowadays CPUs are so fast, they compress
>faster than HDDs move the heads around and do the writes.
>
That is the fact. Moreover CPUs tends to develop faster then hard drives.
> So compression,
>if done properly, can be with no negative impact to speed.
>
>Can you say what level of compression with which processors would handle
>it without speedloss?
>
We don't have comprehensive benchmarks as it is not quite stable. The
following is some
results for 'cp'. Note that the cpu time doesn't include flushing and
compression:
belka workstation:
Dual Intel(R) Xeon(TM) CPU 2.40GHz;
1G RAM;
36G ide partition;
SMP on;
Linux 2.6.9-rc1-mm5
reiser4 (Large keys)
Creation of 20 linux source trees
UNIX_FILES:
(policy=tails)
real 2m32.505s
sys 1m18.876s
df 3205900
(policy=smart)
real 2m22.251s
sys 1m1.100s
df 3292936
CRYPTCOMPRESS FILES
(64K compression):
NONE
real 2m27.448s
sys 0m46.702s
df 3214952
GZIP1
real 2m50.132s
sys 0m44.647s
df 1045660
LZO1
real 1m52.028s
sys 0m44.779s
df 1343188
LZRW1
real 1m50.048s
sys 0m44.644s
df 1504196
>Regards,
>Maciej
>
>
>
next prev parent reply other threads:[~2005-03-03 11:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-02 4:34 reiser4.1 Gagan Rajpal
2005-03-02 4:34 ` reiser4.1 Gagan Rajpal
2005-03-02 15:11 ` reiser4.1 Vladimir Saveliev
2005-03-02 21:47 ` reiser4.1 Hans Reiser
2005-03-03 8:55 ` Re[2]: reiser4.1 Pysiak Satriani
2005-03-03 11:09 ` Edward Shishkin [this message]
2005-03-04 7:55 ` Valdis.Kletnieks
2005-03-04 19:22 ` Re[4]: reiser4.1 Pysiak Satriani
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