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I have never used to flash photography. For taking indoor photos, I usually just push the ISO. However, recently after I have tried the Canon 580 EX II, I found that I can get a totally new tone for taking indoor photos: a very sharp and crisp image. Finally I rushed to buy the Nissin di866 which costed HK$1880 鳴謝達寶客串做model. Taken using Tamron 90mm macro+90 degree 跳燈 
For My core i7 machine with ASUS P6T deluxe MB(X58+ICH10R) running Win7 64 bits c:\ drive (single 500GGB SATA DISK) Sequential Read : 114.117 MB/s Test Size : 100 MB d:\ drive (2x1TB SATA RAID 1 using ICH10R), actually I am still researching why the squential R/W is so slow. I have refreshed the most updated BIOS and drivers from ASUS, but the results make no differences. I am still asking myself, is chipset RAID 1 really so slow or just because of my special case?? Sequential Read : 44.881 MB/s Test Size : 100 MB EMC iSCSI AX150 Sequential Read : 4.594 MB/s Test Size : 100 MB Thecus NAS5200 iSCSI Sequential Read : 74.483 MB/s Dell Optiplex 620 p4 dual core 2.8Ghz running XP c:\ single 500GB SATA disk e:\ (320 GB PATA disk) Sequential Read : 55.087 MB/s Recently I have done some informal disk performance test on my newly arrived workstations. (copy a 1GB text file on the same file system). On a Dell Precsion T3500 with Linux software RAID1 of 2x500GB SATA disk with AHCI enabled : [root@gsx42 disk1]# time cp a b On our busy mail server with PERC6i+ 2x15krpm SAS disk [root@server mail]# time cp a b It seems that the R/W performance of our PERC6i+SAS disk is not very satisfactory when compared to our new workstation though the mail server is much busier. After some research on google, I added the below parameter : blockdev –setra 16384 /dev/drive. The original readahead buffer for Linux is 128k, I changed this to 8M and redo the test : root@server mail]# time cp a b A nearly double in performance!! I also note that this readahead buffer is only useful in sequential read of large files. This may not be useful for lots of random access of small blocks of data. However, for our mail server, it need to handle lot of large mailboxes so this should be useful. And for Vmware server hosting the vms in local storage, this parameter will be useful too. Useful references : 2. http://www.overclock.net/linux-unix/388475-linux-performance-tuning.html Recently I have a need to configure a web directory to have user authentication to access its content. The simplest way is to use .htaccess + htpasswd. However,the requirement specified that the user should be able to change their assigned password later. This requirement make me can’t use the traditional file based authentication (password hard-coded and cannot be changed by user). After some google search, I decided to use put the users and password in the MySQL database so the user can change their password easily through a simple PHP program. In order to make use of the MySQL user authentication via Apache .htaccess, I have to compile the mod_auth_mysql module into the apache server. This seems to be easy at the first glance, however I can’t compile it successfully on the apache 2.2.x. It seems that the module is designed for the earlier 1.3.x version and can’t compile well on 2.2.x. However, I remembered I have installed this module as RPM on CentOS/RHEL 5 a no. of times so this module should be able to work well with Apache 2.2.x. At last I get the source RPM as mod_auth_mysql-3.0.0-3.1.src.rpm from CentOS repository, install it and patch the bundled tar.gz with the bundled patch and compile, it works. Afterward, I use the below .htaccess to test according to the doc: Options Indexes But I got the errors below : [Mon Feb 08 11:58:06 2010] [error] Internal error: pcfg_openfile() called with NULL filename Again doing some research found that I have to turn off file based authentication explicilty, otherwise apache will try to find the password file and failed. The correct .htaccess should be as below : Options Indexes AuthMYSQLEnable on 簡直係偶像 等我都扮下記者先.
Induro AKB0 adventure kit http://www.indurogear.com/products/details.asp?ID=20754
have done a little bit research on tripod. Many people in forums will recommend you to spend several thousand dollars to buy a decent tripod which will be useful for many years. However, tripod of this class is certainly over cost to me. I have tried this one and found its cost (HK $800), weight (only 1.2Kg with the ball head and the leg), load (It can hold my Canon EOS 400D + Tarmon 18-270mm LENS firmly, they weight about 1kg) and height (with raised center column) are all fit to my requirement. Another brand I would consider is Benro (actually Benro & Induro is the same…..) but I still think that this model is a bargain.
Gitto VGR 9254-S1
SERVER TYPE: Windows Server 2003 R2 VM ON ESXi 4.0 U1 Fibre Channel SAN Fabric Test
SERVER TYPE: Windows Server 2003 R2 VM ON ESXi 4.0 U1
CPU TYPE / NUMBER: VCPU / 1 / 1GB Ram (thin provisioned) HOST TYPE: HP DL385 G2, 16GB RAM; 2x QC AMD Opteron 2356 Barcelona STORAGE TYPE / DISK NUMBER / RAID LEVEL: EMC Celerra NS-120 / 15x 146GB 15K 4Gb FC / 3x RAID 5 5×146 SAN TYPE / HBAs: swISCSI OTHER: Shared NetGear 1Gb SoHo Ethernet switch swISCSI Test
SERVER TYPE: Windows Server 2003 R2 VM ON ESXi 4.0 U1
CPU TYPE / NUMBER: VCPU / 1 / 1GB Ram (thin provisioned) HOST TYPE: HP DL385 G2, 16GB RAM; 2x QC AMD Opteron 2356 Barcelona STORAGE TYPE / DISK NUMBER / RAID LEVEL: EMC Celerra NS-120 / 15x 146GB 15K 4Gb FC / 3x RAID 5 5×146 SAN TYPE / HBAs: NFS OTHER: Shared NetGear 1Gb SoHo Ethernet switch NFS Test
find a bug in VMWare Server 2.0.2, cannot add the 3rd user or more for permission assignment after adding the 2nd user and the below error is prompted: Check the file /etc/vmware/hostd/authorization.xml : <ConfigRoot>
<ACEData id="10">
<ACEDataEntity>32</ACEDataEntity>
<ACEDataId>10</ACEDataId>
<ACEDataIsGroup>false</ACEDataIsGroup>
<ACEDataPropagate>true</ACEDataPropagate>
<ACEDataRoleId>-1</ACEDataRoleId>
<ACEDataUser>sfluk</ACEDataUser>
</ACEData>
<ACEData id="11">
<ACEDataEntity>ha-folder-root</ACEDataEntity>
<ACEDataId>11</ACEDataId>
<ACEDataIsGroup>false</ACEDataIsGroup>
<ACEDataPropagate>true</ACEDataPropagate>
<ACEDataRoleId>-1</ACEDataRoleId>
<ACEDataUser>root</ACEDataUser>
</ACEData>
<NextAceId>11</NextAceId>
</ConfigRoot>
It seems that the problem is the entry <NextAceId>11</NextAceId>, I changed it to <NextAceId>12</NextAceId> and the problem is fixed… |
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