Gilbert Sebenste wrote:
Hey Mike,
Gilbert,
I run CentOS 4.5 with SATAII drives in hardware raid arrays with no issues.
For production machines I would highly recommend running CentOS (RHEL4/5)
it's stable and mature. If you want to play with Fedora, then install VMware
and run Fedora in a guest session.
That's my thoughts. Also I have found running the ldm queue in a ramdisk
really lowers the disk I/O significantly. With low prices of ram, create
1-2GB ram disk for the ldm queue is affordable and you will notice the I/O
wait go down on LDM systems receving/passing data...such as a dedicated
NOAAPORT/LDM machine.
I don't have a machine that just passes it on. I think the reason, in
part, is that I hammer my machines: they ingest NOAAPORT, act as webn
servers, and make thousands of images every hour. So I really make them
work.
My preference has proven to be to distribute loads and use separate
systems for hard-core processing. LDM can be memory intensive. Since I
do a lot of relaying here, too, I dedicate one system (really two...
long story) to that, and then have several others filing, processing,
etc. I don't recall if we went to SATA-II. Since losing my sys admin
and taking on those duties, I've not gotten into a box to check
explicitly, but I thought we had. That said, they'd all be on CoRAID
systems as we rarely keep more than local system disk in machines anymore.
So far, 4 days and counting. Not ready to call it cured yet, though. But
with RedHat and my vendor thinking it's the drive ultimately causing the
problem, I'm getting ready to call it cured.
But I am going to use SCSI when NEXRAD2 goes super-res, if this problem
isn't fixed one way or another.
Think SAS rather than conventional SCSI. We've started migrating to
that for our RAID shelves and some of the Sun servers (running Centos)
we have.
gerry
--
Gerry Creager -- gerry.creager@xxxxxxxx
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843
