: Greg Smith [mailto:g...@2ndquadrant.com]
Skickat: den 29 januari 2011 01:27
Till: Lars
Kopia: mark; pgsql-performance@postgresql.org
Ämne: Re: [PERFORM] Migrating to Postgresql and new hardware
Lars wrote:
> Below is a quote from the Pliant datasheet:
> "No Write Cache:
> Plian
Lars wrote:
Below is a quote from the Pliant datasheet:
"No Write Cache:
Pliant EFDs deliver outstanding
write performance
without any dependence on
write cache and thus does
not use battery/supercap."
I liked the article The Register wrote about them, with the headline
"Pliant's SSDs are a
On Thu, Jan 20, 2011 at 7:48 AM, Andy Colson wrote:
> Or... PG is just so good we've never had to use more than one database
> server! :-)
Hehe, while you can do a lot with one server, there are some scenarios
where sharding is the answer. I have a horror story about not
sharding when we shoul
On 1/19/2011 6:42 PM, Craig Ringer wrote:
On 01/19/2011 05:09 PM, Lars wrote:
Thanks for the reply!
As others have mentioned, how are you going to be doing your "shards"?
Hmm... shards might not have been a good word to describe it. I'll
paste what I wrote in another reply:
I used sharding a
On 01/19/2011 05:09 PM, Lars wrote:
Thanks for the reply!
MyISAM was chosen back in 2000. I'm not aware of the reasoning behind this
choice...
Dell claims both the Samsung and the Pliant are safe to use.
Below is a quote from the Pliant datasheet:
"No Write Cache:
Pliant EFDs deliver outstandi
database servers. There are some shared data that is stored in a special
"shared" database.
/Lars
-Ursprungligt meddelande-
Från: mark [mailto:dvlh...@gmail.com]
Skickat: den 19 januari 2011 05:10
Till: Lars
Kopia: pgsql-performance@postgresql.org
Ämne: RE: [PERFORM] Migrating to Po
> Are you going to RAID the SSD drives at all?
Yes, I was thinking four drives in RAID 10 and a (hot) spare drive...
> Of course this is based on my experience, and I have my fireproof suit since
> I mentioned the word fusionIO :)
Hehe
FusionIO has some impressive stats!
SSD in RAID10 provides r
> No idea what mysql thinks a shard is, but in PG we have read-only hot
> standby's.
I used sharding as an expression for partitioning data into several databases.
Each user in the system is unaware of any other user. The user never accesses
the private data of another user. Each user could in th
On Tue, Jan 18, 2011 at 3:56 AM, Lars wrote:
> Any comments on the setups? How would an alternative with 15K disks (6 RAID
> 10 + 1 spare, or even 10 RAID10 + 1 spare) compare?
RAID-10 is going to trounce RAID-5 for writes, which is where you
usually have the most issues.
> How would these alt
On 18/01/11 18:56, Lars wrote:
> Hi,
>
> We are in the process of moving a web based application from a MySql to
> Postgresql database.
> Our main reason for moving to Postgresql is problems with MySql (MyISAM)
> table locking.
> We will buy a new set of servers to run the Postgresql databases.
l.org
> Subject: [PERFORM] Migrating to Postgresql and new hardware
>
> Hi,
>
> We are in the process of moving a web based application from a MySql to
> Postgresql database.
> Our main reason for moving to Postgresql is problems with MySql
> (MyISAM) table locking.
I would neve
On Tue, 18 Jan 2011 16:06:17 -0600, Strange, John W
wrote:
Of course this is based on my experience, and I have my fireproof suit
since I mentioned the word fusionIO :)
I'll throw a fire blanket up as well. We have a customer who has been
running Fusion IO with Postgres for about 2 years
d the word fusionIO :)
- John
-Original Message-
From: pgsql-performance-ow...@postgresql.org
[mailto:pgsql-performance-ow...@postgresql.org] On Behalf Of Lars
Sent: Tuesday, January 18, 2011 4:57 AM
To: pgsql-performance@postgresql.org
Subject: [PERFORM] Migrating to Postgresql an
oops, call them database 'a' and database 'b'.
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On 1/18/2011 4:56 AM, Lars wrote:
Hi,
We are in the process of moving a web based application from a MySql
to Postgresql database. Our main reason for moving to Postgresql is
problems with MySql (MyISAM) table locking. We will buy a new set of
servers to run the Postgresql databases.
The curren
Hi,
We are in the process of moving a web based application from a MySql to
Postgresql database.
Our main reason for moving to Postgresql is problems with MySql (MyISAM) table
locking.
We will buy a new set of servers to run the Postgresql databases.
The current setup is five Dell PowerEdge 295
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