MySQL Server Hardware
by John Westcott, IV
Howdy All,
I work in a place that has traditionally used Sun Sparc hardware
running Solaris to host a production MySQL environment.
We are going to be replacing our database servers this year and I am
trying to determine if I want to maintain the norm or if I want to try
to change.
I am interested to see what other people use for hardware/OS for a
production MySQL installation that requires a high amount of uptime.
Thanks in advance for any replies.
-John Westcott
11 years, 9 months
I'd like to see Windows do this....
by Tal Cohen
Hi Folks,
I recently ran across an interesting situation that I wanted to share
this group. A customer of ours called us,
letting us know that our server in their data center was beeping. We tried
to ssh into the box, but kept getting
connection refused. I asked the customer to hook up a monitor and keyboard
to the box, and try a simple TTY.
Sure enough, he was unable to log in. It turns out that the hard drive that
holds the OS (Crux Linux) failed.
Now, that in and of itself is not very interesting. What is interesting
is that our software kept running even
without the OS drive functioning. Our software resides on a separate drive.
Since it was already loaded into
memory and almost never needs to touch the OS drive, it just kept going.and
going..and going..
Tal
11 years, 9 months
PGP Key Signing Party
by Eric Martin
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
This upcoming meeting we are going to have a PGP Key Signing Party.
For those of you who don't know what PGP is, allow me to briefly
explain. This is all base off of the GPG Key Signing HOWTO
(http://www.rubin.ch/pgp/kspa/gpg-party.en.html) which I suggest for
further reading. Those who do know can feel free to skip down to the
next paragraph. PGP stands for Pretty Good Privacy, and is a Public
Key Infrastructure that allows us to communicate securely and deal with
data in a secure fashion. There is a public key that one would
typically upload to a server and a private key that you hold on to.
With the private key you can decrypt / sign, and with the public key you
can encrypt / verify emails and documents. Key signatures come into
play when you validate that a specific key belongs to a specific person
and extend the web of trust.
Here's what needs to be done BEFORE the meeting on your computer, or on
a secure terminal (e.g. not in a computer lab on your campus). I'll
post directions both for GPG (Gnu Privacy Guard) and Kgpg (the KDE front
- -end to gpg for all of those who like GUIs).
1. Generate a Key Pair / Verify your key won't expire soon
gpg --gen-key
(Default values of DSA/Elgamal is fine and the default of 2048 is good.)
I recommend 3 - 5 years for a key lifespan (how long the key will be
good for)
1a) for those of you wishing to use Kgpg, goto Keys -> Generate Key
Pair and fill in the dialog box
Once you create the New key pair, check the Save As box under
_Revocation Certificate_ to save a Revocation Certificate (see 2)
1c) For those of you who already have a key, make sure yours isn't about
to expire (like mine did). If it has expired, you can extend the life by
$ gpg --edit-key <key-id>
and typing expire at the command prompt
next, generate a new key-pair and sign your new key with your old key
so anyone who trusted your old one will trust the new one.
2) Generate a revocation certificate
Revocation certificates are for situations where you forget your
passphrase, the key becomes comprised, etc you can revoke your key.
$ gpg --output revoke.asc --gen-revoke <key-id>
Save this in multiple places, print a copy etc in case you need
it.
2GUI) If you didn't create a revocation cert in Kgpg, just right click
on your new key and select Revoke Key. when the box pops up only check
Save As
3) Upload your key to the Designated server for this party (pgp.mit.edu)
$ gpg --send-key --keyserver=pgp.mit.edu <key-id>
3GUI) Right Click on the Key, select Export Public Keys, select Default
Key Server (make sure it's pgp.mit.edu under Settings)
4) Email me your key's fingerprint so I can add it to the list
$ gpg --fingerprint <key-id>
Copy and Paste that into an email to the coordinator (me, Eric Martin).
5) print out a copy of that same output and bring it to the meeting.
I'll make up a check list and bring them to the meeting for everyone to use.
Example output from Step 4:
pub 1024D/A9413B9F 2007-04-09 [expires: 2010-04-08]
Key fingerprint = D1C4 086E DBB5 C18E 6FDA B215 6A25 7174 A941 3B9F
uid Eric J. Martin <eric.joshua.martin(a)gmail.com>
uid Eric J. Martin <freak4uxxx(a)gmail.com>
sub 2048g/01F81B8E 2007-04-09 [expires: 2010-04-08]
my <key-id> is A9413B9F (which is always the same as my last 8 hex
digits of my fingerprint). If like me you don't always remember your
key-id you can use your email address and it will still work.
My full key information is:
Key ID: A9413B9F
Key Type: DSA
Hex Fingerprint: D1C4 086E DBB5 C18E 6FDA B215 6A25 7174 A941 3B9F
Key Size: 1024
(The DSA key is always 1024 bits. The ElGamal Encryption key is 2048
bits in my case, but isn't needed for the keysigning party.)
What you should bring to this party
1. Yourself, no exceptions
2. Two forms of positive photo ID - driver's license and passport are good
3. Key Id, Key Type, Hex Fingerprint and Key size info
***Please print out your own copy of your info to compare against mine
when you arrive ***
4. Pen / Pencil
What you Should Not Bring
1. Computer
I want to thank Chuck Anderson for helping me out. If you have any
questions please let me know.
Eric
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iD8DBQFGMBvKaiVxdKlBO58RAsCVAJ9cA488l+SybdxD+rgqNWGi/U9tUQCeMvH8
UAhMTFVRG5SbVVn5jqbVwqg=
=BSzn
-----END PGP SIGNATURE-----
11 years, 9 months
MySQL Server Hardware
by joel d
I'll take a stab at this one.
At work our MySQL database contains product info and indexing data.
The reasoning for designing and taking this outside of the business
application is the business app. doesn't do web communication well
(limited functionality and at times spotty app reliability). The
business app doesn't matter (and I bet no one has heard of it anyway).
Our design spec was hearty at a HP DL 385 with dual AMD CPUs (dual
core I think) 5GB of RAM and around 7 internal 15k drives in RAID 5.
Every bit of hardware is HP/Compaq. Without starting a distro thread
we picked Red Hat AS V4. This combo has served us well and I am sure
*many* other distros would do this at least as well. For us our
biggest corporate reason for R.H. was most of our application vendors
suported R.H in one way or another (a vote for getting good at only
one skillset/distro).
During application & DB development we considered uptime and ordered a
second identical box mainly for a total server failure of any sort.
They run very well as MySQL master and slave.
In the year it has been up we are very happy with this combination.
Feel free to forward any specific questions (direct or via the group).
Hope this helps,
Joel
=============================
Date: Tue, 24 Apr 2007 14:59:55 -0400
From: "John Westcott, IV" <John.Westcott(a)tufts.edu>
Subject: [Wlug] MySQL Server Hardware
To: wlug(a)mail.wlug.org
Message-ID: <20070424145955.3hftuclhdwg0ck4s(a)webmail.tufts.edu>
Content-Type: text/plain; charset=ISO-8859-1; format="flowed"
Howdy All,
I work in a place that has traditionally used Sun Sparc hardware
running Solaris to host a production MySQL environment.
We are going to be replacing our database servers this year and I am
trying to determine if I want to maintain the norm or if I want to try
to change.
I am interested to see what other people use for hardware/OS for a
production MySQL installation that requires a high amount of uptime.
Thanks in advance for any replies.
-John Westcott
11 years, 10 months
Hauppauge 500 woes
by Mike
I've been working on setting up a MythTV box with a Hauppauge 500. The
reception I am getting is a bit grainy. I read that it could be the
firmware, too high of a signal, or too low of a signal. I took care of the
firmware last night by following the directions on their wiki. The picture
is still a bit grainy. Before I go out an buy a signal booster I was
wondering if anyone had any ideas or experience with the 500.
~Mike
--
They who would give up an essential liberty for temporary security,
deserve neither liberty or security --Ben Franklin
11 years, 10 months
New ULTRA1 - one step forward, two steps backward....
by ken jones
Folks,
When the box failed to boot, you might remember, it complained that the
kernel was "too old".
I remade the box using the newer kernel 2.6.20. I apparently configured
the correct silo.conf (there are five of them in there when using the
livecd). It looked like it was going to BOOT!! :-) See below.....
Trouble is this is as far as it got.
I printed and used as reference the Gentoo Linux 2006.1 SPARC Handbook,
the Using UTF08 with Gentoo document and the Gentoo Upgrading Guide.
Nevertheless I had a very difficult time with manual configuration of
the kernel. I had not the faintest idea which modules I could ignore
and which I needed to modularize
Question: is there a log somewhere? I did emerge syslog-ng.
Another question: Where is the detailed documentation on all the modules?
Final question: How do I get a hint at what I did wrong?
Ken
----------------snip of hyperterminal watching SUN ULTRA boot.------------
Sun Ultra 1 UPA/SBus (UltraSPARC 200MHz), No Keyboard
OpenBoot 3.11, 192 MB memory installed, Serial #9633364.
Ethernet address 8:0:20:92:fe:54, Host ID: 8092fe54.
Initializing Memory \
Initializing Memory \
Initializing Memory \
Initializing Memory -
Initializing Memory -
Boot device: disk File and args:
SILO Version 1.4.13
boot:
Allocated 8 Megs of memory at 0x40000000 for kernel
Loaded kernel version 2.6.20
Remapping the kernel... done.
Booting Linux...
-----------------------------------end snip-----------------------------
11 years, 10 months
3D support
by dulsi＠identicalsoftware.com
I started looking for a new laptop. I'd like one that can play
Neverwinter Nights with open source drivers. Obviously that is a
problem since 3D support without the binary drivers is not great. I
figured since the game is rather old a good cpu (or two for the duo)
and a well supported open source driver (I remember hearing Intel
having released an open source driver) that it could run reasonably.
I asked some linux laptop vendors and everyone told me that I would
need the binary drivers. Are they right and we still can't run a 5
year old game? Am I stuck waiting for nouveau?
Dennis Payne
dulsi(a)identicalsoftware.com
11 years, 10 months
JOBS - Several Linux roles Embedded and Kernel projects
by John Spencer
We have 2 clients in MA and one in NH that are looking for Linux experts
for various consulting projects.
Our Client in MA (6+ mths.) is a leading provider of comprehensive
compliance and content control solutions. They offer comprehensive
network and desktop solutions that provide comprehensive visibility and
control of inappropriate activity and information leakage across all
channels of communications.
Linux systems, real time processing, networking, C++/C Developer
(Principal Level) to work on a Second generation of product from
scratch. Will leverage existing pieces from their current product but
begin with a new scalable and modular architecture. Heavy LINUX systems
exp. with Windows OR Heavy WINDOWS with Linux systems. Strong C++/C,
Real-time processing. Agile Development- " High Quality/ Fast Paced".
Using Eclipse and Subversion. Low-level programming with File Systems,
etc. NO Java needed.
They are using RedHat Linux 2.6 kernel.
MUST HAVE: Have been part of a team that has shipped a product and/or
built a product that was shipped. Experience getting a product through
its life-cycle and gotten it to market. STRONG Communication Skills,
Highly Collaborative, Results driven, No hand-holding, Strong
Development.
************************************************************************
**
Consultant needed as part of a small team (in MA 6 mths temp to perm
possible) to produce high quality functional specifications, design
specifications, product code, unit tests, and build scripts as needed.
You must also be able to rapidly and effectively troubleshoot, diagnose,
and resolve defects in an existing code base. You must be comfortable
selecting and maintaining an appropriate focus in your daily work that
will range from broad and abstract system architecture issues to
detailed and concrete implementation issues.
Responsibilities:
- Provide software support and integration for new hardware features as
they get added to the platform
- Provide Linux support to upgrade Linux distribution as well as
associated build environment
- Work on low level features such as Software Upgrade
- Instrument code and help analyze resource utilization
- Maintain code repository
- Address operational issues
- Work with team on code releases
Requirements
- BS or MS in Computer Science, or equivalent experience
- Either Real-Time OS or DSP experience
- Experience in Linux, C, C++, Perl
- Innovation and attention to detail
- Ability to work independently but to know to get direction when you
need it
- Ability to work well with others on a small focused team
- Excellent written and oral skills
- Ability to obtain security clearance
************************************************************************
**********************************************
Principal Software Engineer (6+ mths in southern NH)
Our client is looking for a Sr. C++ developer to replace current
functionality on their embedded cards with edge nodes Linux based
servers. They are currently running 1500 streams/card and want to run
2500 streams/edge node. Must have experience at the Linux kernel, driver
and file systems level. This is mostly new development with some porting
of the existing functionality from the embedded card.
Must have either SMP or experience writing code in a multiprocessor
environment.
If you are interested and qualified, please send your confidential
resume to jspencer(a)optimaleng.com
Regards,
John
John Spencer
(978) 256-1113 ext 7608
jspencer(a)optimaleng.com
OPTIMAL ENGINEERING PARTNERS
"Your Optimal partner for full-lifecycle engineering services in
embedded and real-time, systems and application development"
www.optimalengineering.com <http://www.optimalengineering.com/>
11 years, 10 months
I am getting discouraged with Gentoo on ULTRA1
by ken jones
For those of you who are kind enough to care....sigh.
On my Ultra1 I succeeded in following the directions in
<http://www.gentoo.org/doc/en/handbook/handbook-sparc.xml>
to the letter, or so I thought. I "emerge'd" successfully. I
compiled successfully. I chroot'd successfully. I removed
the CD from its drive. I boot'd and I got the following.
yadda yadda yadda....
VFs: Mounted root(ext3 filesystem) readonly
Mounted devfs on /dev
FATAL: kernel too old
Unimplemented SPARC system call 188
Kernel panic: Attempted to kill init!
Press Li-A to return to the boot prom
I compiled kernel-2.4.34. I chose 2.4 over 2.6 because the
handbook hinted I should..
Now I do not even know what questions to ask myself. I checked
Google on the "kernel too old" message and the "Attempted to
kill" message. I could not understand the few matches that
it found.
My bet is that I need bigger SCSI hard drives.
I'll also be glad to shut up if this is getting boring.
Ken
11 years, 10 months
