Butterfly On A Wheel WS DVDRip XviD
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Archive for December, 2007 Page 2 of 4
XCache is a PHP opcode cacher created by the same developer who brought us Lighttpd. An opcode cacher significantly increases PHP’s performance by caching the compiled state of PHP code to avoid time-consuming recompilation each time a script is executed. There are a handful of great opcode cachers on the market currently, incuding APC and eAccelerator (here’s a more comprehensive list). APC is written by some of the developers of PHP and will be bundled with PHP6. eAccelerator has a long history and might be the most popular and widely supported opcode cacher. I chose XCache due to its reputation for superior performance (source) and its ability to take advantage of multi-core processors.
Setting up XCache on Gentoo Linux is dead simple.
Install XCache
emerge -va dev-php5/xcache
Configure XCache
nano /etc/php/cgi-php5/ext-active/xcache.iniEdit anything you see fit. See this page for details.
Since Slicehost is running on twin dual-core processors, I changed “xcache.count” to 5 (n+1 where n is the number of processors) to take advantage of the Splitted Cache feature.
Restart PHP
I have PHP running as a FastCGI daemon, so I restart with
/etc/init.d/fcgi.php restart
Check phpinfo() to verify that XCache is loaded. You should see the following in the “Powered by Zend” box:
with XCache v1.2.1, Copyright (c) 2005-2007, by mOo
I was shocked to discover that converting one’s filesystem is simple as pie and totally safe. The process goes like this:
- Remove cruft from your system (optional)
- Reboot into a LiveCD environment (optional if the partition you want to convert can be mounted read-only without rebooting)
- Mount the partition you want to convert in read-only mode
- Copy the contents of the partition somewhere temporarily (ex. another partition, external drive, DVD, etc.)
- Unmount the copied partition
- Format the partition with your desired filesystem
- Mount the formatted partition and copy all the files back
- Edit /etc/fstab to reflect the new filesystem
- Reboot and profit
Thanks to Slicehost’s wonderful Rescue Mode with a 2GB Rescue Slice, I was able to use this method to convert my Gentoo VPS from ext3 to XFS. Here’s a step-by-step account. These steps were performed on a 256MB VPS at Slicehost. YMMV.
Continue reading ‘Convert your Linux filesystem safely and easily (even on a VPS)’
