Yeb Havinga wrote:
Writes/s start low but quickly converge to a number in the range of
1200 to 1800. The writes diskchecker does are 16kB writes. Making this
4kB writes does not increase writes/s. 32kB seems a little less, 64kB
is about two third of initial writes/s and 128kB is half.
Let's t
Yeb Havinga wrote:
Yeb Havinga wrote:
diskchecker: running 37 sec, 4.47% coverage of 500 MB (1468 writes;
39/s)
Total errors: 0
:-)
OTOH, I now notice the 39 write /s .. If that means ~ 39 tps... bummer.
When playing with it a bit more, I couldn't get the test_file to be
created in the right
Joshua D. Drake wrote:
That is quite the toy. I can get 4 SATA-II with RAID Controller, with
battery backed cache, for the same price or less :P
True, but if you look at tests like
http://www.anandtech.com/show/2899/12 it suggests there's probably at
least a 6:1 performance speedup for wor
On Sat, 2010-07-24 at 16:21 -0400, Greg Smith wrote:
> Greg Smith wrote:
> > Note that not all of the Sandforce drives include a capacitor; I hope
> > you got one that does! I wasn't aware any of the SF drives with a
> > capacitor on them were even shipping yet, all of the ones I'd seen
> > wer
Greg Smith wrote:
Note that not all of the Sandforce drives include a capacitor; I hope
you got one that does! I wasn't aware any of the SF drives with a
capacitor on them were even shipping yet, all of the ones I'd seen
were the chipset that doesn't include one still. Haven't checked in a
f
Yeb Havinga wrote:
diskchecker: running 37 sec, 4.47% coverage of 500 MB (1468 writes; 39/s)
Total errors: 0
:-)
OTOH, I now notice the 39 write /s .. If that means ~ 39 tps... bummer.
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Greg Smith wrote:
Note that not all of the Sandforce drives include a capacitor; I hope
you got one that does! I wasn't aware any of the SF drives with a
capacitor on them were even shipping yet, all of the ones I'd seen
were the chipset that doesn't include one still. Haven't checked in a
f
On Sat, Jul 24, 2010 at 3:20 AM, Yeb Havinga wrote:
> Hello list,
>
> Probably like many other's I've wondered why no SSD manufacturer puts a
> small BBU on a SSD drive. Triggered by Greg Smith's mail
> http://archives.postgresql.org/pgsql-performance/2010-02/msg00291.php here,
> and also anandtec
Yeb Havinga wrote:
Probably like many other's I've wondered why no SSD manufacturer puts
a small BBU on a SSD drive. Triggered by Greg Smith's mail
http://archives.postgresql.org/pgsql-performance/2010-02/msg00291.php
here, and also anandtech's review at
http://www.anandtech.com/show/2899/1 (s
On Jul 24, 2010, at 12:20 AM, Yeb Havinga wrote:
> The problem in this scenario is that even when the SSD would show not data
> loss and the rotating disk would for a few times, a dozen tests without
> failure isn't actually proof that the drive can write it's complete buffer to
> disk after po
On 7/24/10 5:57 AM, Torsten Zühlsdorff wrote:
Craig James schrieb:
The problem is that Google ranks pages based on inbound links, so
older versions of Postgres *always* come up before the latest version
in page ranking.
Since 2009 you can deal with this by defining the canonical-version.
(htt
Craig James schrieb:
The problem is that Google ranks pages based on inbound links, so
older versions of Postgres *always* come up before the latest version
in page ranking.
Since 2009 you can deal with this by defining the canonical-version.
(http://googlewebmastercentral.blogspot.com/2009/02
On Sat, 24 Jul 2010, David Boreham wrote:
Do you guys have any more ideas to properly 'feel this disk at its teeth' ?
While an 'end-to-end' test using PG is fine, I think it would be easier to
determine if the drive is behaving correctly by using a simple test program
that emulates the stora
Do you guys have any more ideas to properly 'feel this disk at its
teeth' ?
While an 'end-to-end' test using PG is fine, I think it would be easier
to determine if the drive is behaving correctly by using a simple test
program that emulates the storage semantics the WAL expects. Have it
wri
Hello list,
Probably like many other's I've wondered why no SSD manufacturer puts a
small BBU on a SSD drive. Triggered by Greg Smith's mail
http://archives.postgresql.org/pgsql-performance/2010-02/msg00291.php
here, and also anandtech's review at
http://www.anandtech.com/show/2899/1 (see pag
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