On Thu, 29 Mar 2007, Matt Smiley wrote:
Hi David,
Thanks for your feedback! I'm rather a newbie at this, and I do appreciate the
critique.
First, let me correct myself: The formulas for the risk of loosing data when
you loose 2 and 3 disks shouldn't have included the first term (g/n). I'll
Hi David,
Thanks for your feedback! I'm rather a newbie at this, and I do appreciate the
critique.
First, let me correct myself: The formulas for the risk of loosing data when
you loose 2 and 3 disks shouldn't have included the first term (g/n). I'll
give the corrected formulas and tables at
On Tue, 27 Mar 2007, Matt Smiley wrote:
The goal is to calculate the probability of data loss when we loose a
certain number of disks within a short timespan (e.g. loosing a 2nd disk
before replacing+rebuilding the 1st one). For RAID 10, 50, and Z, we
will loose data if any disk gr
Hi Dimitri,
First of all, thanks again for the great feedback!
Yes, my I/O load is mostly read operations. There are some bulk writes done in
the background periodically throughout the day, but these are not as
time-sensitive. I'll have to do some testing to find the best balance of read
vs.
On Friday 23 March 2007 14:32, Matt Smiley wrote:
> Thanks Dimitri! That was very educational material! I'm going to think
> out loud here, so please correct me if you see any errors.
Your mail is so long - I was unable to answer all questions same day :))
>
> The section on tuning for OLTP tra
Thanks Dimitri! That was very educational material! I'm going to think out
loud here, so please correct me if you see any errors.
The section on tuning for OLTP transactions was interesting, although my OLAP
workload will be predominantly bulk I/O over large datasets of
mostly-sequential bloc
On Friday 23 March 2007 03:20, Matt Smiley wrote:
> My company is purchasing a Sunfire x4500 to run our most I/O-bound
> databases, and I'd like to get some advice on configuration and tuning.
> We're currently looking at: - Solaris 10 + zfs + RAID Z
> - CentOS 4 + xfs + RAID 10
> - CentOS 4 + e
