Entries in the ' sysadmin ' category
One method of backup or recovery isn’t enough. Period. No matter what anyone tells you, what the book says, what your boss says, or what you think you need, you need to be backing things up in many ways.
Here’s a few examples.
MySQL
Theoretically, you could recover anything you needed …
In the last issue of my current consulting saga, Detecting and Resolving LAMP Stack Performance Problems, we talked about a Drupal site that was being brought offline every few hours due to poor tuning of the LAMP stack. With the default settings, a site isn’t going to take much …
As a sysadmin, we sometimes run into performance problems with multiple angles and portions. It’s sometimes not particularly obvious where the actual performance problem is, and resolving one problem that you can see might bring another couple of problems to the surface.
The below comes from a consulting gig that …
At the Sun OpenWorld conferene keynote today, there were a few new products listed in the Flash storage arena — most notably the F5100 that everyone’s jibber-jabbering about.
As a smaller customer, I’m far more interested in the SunFlash F20 PCIe card — which I don’t see …
- vSphere, SAN or iSCSI-related:
- Using iSCSI with vSphere – Pretty much the bible, they covered it all.
- 2TB drives are here, but Stephen Foskett identifies the issues with bringing them to the enterprise. In the same vein, he covers the death of RAID as a storage technology, and
…
Despite the recent pot-banging around the Sun/Oracle merger and the allegations that Sun’s getting it’s customer base stolen out from under it, I just pushed the button on a fairly large cluster with Sun as the hardware vendor.
Simply put, I couldn’t find machines with better stats for the …
It’s Monday morning. Your boss strolls into your office. You just finished with the trouble tickets from the weekend, and this is his favorite time to ruin your entire week. He says, “I have a project for you. I need a cluster with a primary and backup SAN that is …
We’re trying not to use ‘old stuff’ as we’re building out our new cluster, but we have a big need for nfs or some other ad-hoc shared filesystem designed for high i/o on content servers. We’d been using ocfs2, but it’s slower than molasses and doesn’t scale n-ward as you …
As a sysadmin who’s been getting into clustered virtualized hardware stuff, I’m unbelievably jealous of Wolfram Alpha’s custom Dell hardware (note: Youtube video with horrible music, I suggest hitting mute) — it’s a 2u, quad-board, dual-socket, quad-core system. You fit four servers into 2U of space. It’s essentially one …
You can always use LSB scripts (/etc/init.d) with pacemaker, but it’s better to make them osb-compliant…
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