--On Friday, August 22, 2003 8:37 PM -0600 Jim McAtee
<[EMAIL PROTECTED]> wrote:
I don't quite understand the need to read data before any write. Why
wouldn't it just calculate the parity of whatever is being written and
just write it to disk? Wouldn't there be slack space, as with any disk
s
--On Friday, August 22, 2003 1:21 PM -0400 "Lefevre, Steven"
<[EMAIL PROTECTED]> wrote:
"that is not true. mirroring gives you double the read speed and half
the write speed. RAID5 gives you less than half the write speed."
-
OK, I see how it can give you double the read speed, bu
> [EMAIL PROTECTED] wrote:
> > I do not think it is true that mirroring gives no performance benefit
(on a
> > well implemented controller). For reads, the raid controller can read
> > either copy of the data, so that effectively two reads can be in
progress
> > at the same time, doubling read
[EMAIL PROTECTED] wrote:
> > I say go with RAID 5, on a controller card.
>
> > Mirroring just gives you backup, and you lose half your diskspace. It
> offers
> > no performance benefit, and actually the computer might have to work
> harder
> > to make sure the drives are in sync.
>
> I do not thi
-Original Message-
From: news [mailto:[EMAIL PROTECTED] Behalf Of Jon Drukman
Sent: Thursday, August 21, 2003 9:24 PM
To: [EMAIL PROTECTED]
Subject: Re: RAID or not?
Lefevre, Steven wrote:
> I say go with RAID 5, on a controller card.
>
> Mirroring just gives you backup, and
> I say go with RAID 5, on a controller card.
> Mirroring just gives you backup, and you lose half your diskspace. It
offers
> no performance benefit, and actually the computer might have to work
harder
> to make sure the drives are in sync.
I do not think it is true that mirroring gives no per
In the last episode (Aug 21), Jon Drukman said:
> Lefevre, Steven wrote:
> >I say go with RAID 5, on a controller card.
> > Mirroring just gives you backup, and you lose half your diskspace.
> > It offers no performance benefit, and actually the computer might
> > have to work harder to make sure t
Lefevre, Steven wrote:
I say go with RAID 5, on a controller card.
Mirroring just gives you backup, and you lose half your diskspace. It offers
no performance benefit, and actually the computer might have to work harder
to make sure the drives are in sync.
that is not true. mirroring gives you d
[EMAIL PROTECTED] (Lefevre, Steven) writes:
> I say go with RAID 5, on a controller card.
> ..
>
> You get better performance than mirroring or regular drive, because
> the data is spread out over your drives. It's not as good as disk
> striping, though.
Ehh. Wrong. That is not how it works. If y
ROTECTED]>
To: "Jackson Miller" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, August 21, 2003 10:20 AM
Subject: RE: RAID or not?
> I say go with RAID 5, on a controller card.
>
> Mirroring just gives you backup, and you lose half your diskspace. It
offers
lto:[EMAIL PROTECTED]
Sent: Thursday, August 21, 2003 11:56 AM
To: Jon Drukman
Cc: [EMAIL PROTECTED]
Subject: Re: RAID or not?
On Thursday 21 August 2003 2:23, Jon Drukman wrote:
> if you're mostly running SELECTs then i would recommend a mirrored
> configuration.
I would say I am runnin
On Thursday 21 August 2003 2:23, Jon Drukman wrote:
> if you're mostly running SELECTs then i would recommend a mirrored
> configuration.
I would say I am running about %50 SELECTS, 30% UPDATE, 20% INSERT. However I
don't know how to find that out for sure.
Would that affect how I set up the RA
Jackson,
Jackson Miller <[EMAIL PROTECTED]> writes:
> I have 4 SCSI drives currently.
Well, is you want Redundancy you don't have a choice. Mirror them. 2x 2
drives.
You might want to put OS and write-ahead-log on one and
InnoDB/MyISAM-data on the other.
> I would like to have 1 drive run the
I like using either raid 0+1.. it really cooks, or if you can'y spare the
disks, raid 1 ...Something pushing that many queries, should probably
be protected from disk failure.
On Wed, 20 Aug 2003, Jackson Miller wrote:
> I am setting up a dedicated MySQL server with some pretty heavy usage.
Jackson Miller wrote:
I am setting up a dedicated MySQL server with some pretty heavy usage. I am
not much of a sys admin (mostly a programmer). I have some questions about
the best drive configuration.
I have 4 SCSI drives currently.
I would like to have 1 drive run the OS,
1 drive to be th
I am setting up a dedicated MySQL server with some pretty heavy usage. I am
not much of a sys admin (mostly a programmer). I have some questions about
the best drive configuration.
I have 4 SCSI drives currently.
I would like to have 1 drive run the OS,
1 drive to be the MySQL data directory
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