howachen's articles:

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Saftest way to remove expired files from a given directory 23 63 (10/1/2009 4:08:44 AM) comp.os.linux.misc Which one is recommended? 1. find /tmp/ -mtime +30 -type f -delete 2. find /tmp/ -mtime +30 -type f | xargs rm -f 3. find /tmp/ -mtime +30 -type f -exec rm {} ... howa

ICH10R vs mdadm 0 333 (7/19/2009 8:36:19 AM) comp.arch.storage Under latest Linux such as CentOS 5.3. Will ICh10R give slightly better performacne than mdadm? ... howa

Is htmlspecialchars() enought for preventing XSS? 0 30 (7/13/2009 3:49:14 PM) comp.lang.php If I escape my output variable by htmlspecialchars, is it 100% free of XSS? If not, can you give an example. Thanks. ... howa

Killing a updating statement 0 56 (6/10/2009 3:56:13 AM) comp.databases.mysql Hello, If I kill an long running updating statement, will the table become not consistent? i.e. part of table being updated, while part are not. Assume I am using MyISAM. ... howa

Raid5 vs Raid6 under degraded mode 4 117 (5/29/2009 8:46:23 AM) comp.arch.storage Hey, Assume a system with 9 SATA 1TB disks, and 1 hot spare. They are targeted to config as Raid5 or Raid6. If one of the disk failed, which system will perform better? Raid5 and Raid6? By how many %?... howa

Raid suggestions? 5 83 (4/24/2009 7:56:44 AM) comp.arch.storage Hello, We have just bought Dell MD1000, together with 15 SAS 15K hard disks. This server will be connected to 6 web servers which provide a centralized storage using NFS. This server is important as i... howa

What affect the transfer encoding in PHP? 2 48 (4/17/2009 4:52:35 AM) comp.lang.php Hello, I have exactly the "same program", one is run under Apache 1, the other is run under Apache 2. Sure they have difference config as well as different php.ini. But I want to know what settings affect th... howa

Dynamic function? 1 90 (4/4/2009 8:40:50 AM) comp.lang.perl.misc Hello, Is it possible to wrap a non-extistence function of an object, to another function? E.g. package Test; sub new { my ( $class ) = @_; my $self = undef; bless $self, $class; return $self; } sub ... howa

It is possible to listen for event before image is replaced? 3 101 (3/21/2009 12:51:44 PM) comp.lang.javascript Hi If somehow I want to change the image src by using JavaScript. E.g. Is it possible to listen before image "img" is `being replaced`? (Because I don't have control to the onclick event, and the image ... howa

Remove UTF8 BOM from a large file 2 99 (3/14/2009 6:35:29 AM) comp.os.linux.misc Hello, I have some very large files (over GB), are there any command that can enable me to remove UTF8 BOM from that file (edit in place) Thanks. ... howa

howachen's replies:

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Index for binary field? 5 41 (9/4/2008 7:07:58 AM) comp.databases.mysql I have a simple table: CREATE TABLE `test` ( `name` binary(60) NOT NULL default '', PRIMARY KEY (`name`), ) ENGINE=MyISAM DEFAULT CHARSET=latin1 ; In the query like: desc select * from test where name ... howachen (515)

Who determine the Linux File Cache? 4 47 (9/25/2008 10:02:36 AM) comp.os.linux.misc Hello, I have two servers, with 4GB RAM, one server has 36GB HD, the another one has 72GB HD. They are running the same CPU, 4GB RAM etc, running same web application (LAMP). Using top command, on 36GB serv... howachen (515)

Using where; Using index vs Using where 4 38 (10/24/2008 3:08:55 AM) comp.databases.mysql Hello, What are the difference between the following statements, which one is better? mysql> desc SELECT COUNT(*) as `cnt` FROM vote WHERE `ip` = INET_ATON('127.0.0.1') AND (`addtime` > NOW() - INTERVAL 1 D... howachen (515)

Why high load-average? 6 30 (11/24/2008 3:06:14 AM) comp.os.linux.misc Hello, I am running a mix of web server (apache/mod_perl) & mysqld on a server. The config of the server is: Intel Quad Core CPU x 2 (SMP), total = 8 core 8GB RAM 15K Hard disk As you can see from below, the... howachen (515)

Where should I put for timezone setting? 3 41 (11/30/2008 5:25:39 AM) comp.os.linux.misc Currently I put in /etc/profile TZ='Asia/Taipei' export TZ Is this the correct way? ... howachen (515)

Linux VM cache 2 40 (1/21/2009 8:16:51 AM) comp.os.linux.misc Hi, It is well known that Linux cache file aggressively so FS IO can be greatly reduced. That's good. On my busy NFS server, I have the following stats (free -m) total used free ... howachen (515)

Should I use "SERVER_NAME" or "HTTP_HOST" 5 52 (2/1/2009 3:51:34 PM) comp.lang.php After reading the site: http://shiflett.org/blog/2006/mar/server-name-versus-http-host Is that mean we should better use the 'SERVER_NAME' instead of "HTTP_HOST"? ... howachen (515)

Why setroubleshoot is running/enabled? 2 71 (2/2/2009 3:50:20 AM) comp.os.linux.misc Today I have found setroubleshoot is using too much CPU so I killed it. But I am wondering why I have selinux disabled, and this process is running? Maybe anything has triggered it? Thanks. ... howachen (515)

Failed to copy new file using scp 10 89 (2/19/2009 11:02:03 AM) comp.os.linux.misc I am using command to backup a remote folder at (192.168.11.23) to local server e.g. scp -r user@192.168.11.23:/home/backup /home/backup It WORKED when /home/backup does not exist in local folder. After... howachen (515)

Implementing tag features 2 52 (3/10/2009 3:45:36 PM) comp.databases.mysql Is it recommended to use full text index to implement web 2.0 tag features? Consider tags to lot of photos, I use varchar(255) to store the whole tag sentence, and build a full text index using stopword "," ... howachen (515)