Slow Drupal on NFS
Drupal includes many files. When DocumentRoot is hosted on NFS, include calls are slow, because too many lstat() calls which are slow on NFS. Read More »Slow Drupal on NFS
Dell SAS6/iR Windows 2003 x64 driver floppy image
When installing Windows 2003 to Dell M600 blade system windows will not recognize any hard drives. You need to load additional drivers, by pressing F6 during setup. Drivers can be found at Dell FTP site, but Dell is not providing floppy image, just drivers.
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How to change Currently Active Slave when runnning bonding in active-backup mode
When you are running bonding in active-backup mode, you can detect which slave is active by listing /proc/net/bonding/bond0. How to change active slave?
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ethtool: offloading
Enable stateless offloads to improve system performance.
Stateless offloads, such as checksum offload, segmentation offload, and large receive offload, can improve system performance by moving some of the processor-intensive tasks that do not require a connection to the network adapter.
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Recovering deleted lvm volume
LVM is a logical volume manager for the Linux kernel; it manages disk drives and similar mass-storage devices, in particular large ones. The term “volume” refers to a disk drive or partition thereof.
Every LVM operation makes backup of lvm metadata. Metadata archive stored in directory /etc/lvm/archive/ in easily readable text files. Each operation creates own metadata backup file, with information when it was created. For example:
Still using debian etch?
When you need install some package to old discontinued debian, you will get Error 404 Not Found Solution is change /etc/apt/sources.list deb http://archive.debian.org/debian/ etch main… Read More »Still using debian etch?
Checking forward and reverse dns
Very often problems like ‘my website is not working’ or ‘I did not get any emails’ are caused by improperly set up dns records or expired domain. At my work, I’m permanently dealing with incorrectly set up dns records. There are available services like intodns.com which you can use to check dns records for domain. But what to do, if you have problem with reverse dns? Or you want to check, if your reverse delegation is set up correctly?
Hardware raid in debian
To manage and monitor hardware raid, you need proper utility. Most of vendors provides raid utilities only for Redhat based linuxes. For Debian based distribution… Read More »Hardware raid in debian
Apache authentication against active directory
I have found nice howto about apache and Active directory authentication http://www.netexpertise.eu/en/apache/authentication-against-active-directory.html
What makes a hard drive enterprise class?
With shrinking IT budgets you will at some point be tempted fill your RAID controllers with cheap desktop hard drives. You may also be tempted to replace your servers system drives with them as well. I’m going to give you some reasons why you should consider buying those pricey enterprise class drives instead.