configuration
by Eric Jenkinson on April 8, 2010 Categories: Backup and Recovery Tagged: archive log, redo log Note: It is recommended to perform a backup of the database (after a shutdown normal or immediate) prior to changing the archive status of a database. If you would like to perform these tasks
file system
First, follow up the page link http://wiki.centos.org/HowTos/BuildingKernelModules to understand basically kernel source make knowledge. Example Commands. #cd ~/rpmbuild/BUILD/kernel-2.6.18/linux-2.6.18.i686 #cp /boot/config-2.6.32-504.16.2.el6.i686 .config #cp /usr/src/kernel/`uname
configuration
RHEL6 一般必需註冊(免費 30 天評估或付費)才可以獲得線上軟體更新支援及下載, 不註冊的話其實亦可以使用光碟來執行 yum 安裝, 此方法適合多台電腦進行評估測試時免去大量註冊所需, 及沒有聯網環境的獨立電腦, 而且多台電腦亦可以共用光碟分享位置(無需大量燒錄光碟)來安裝軟體, 當然如果要更新軟體的話就必需付費註冊(除非手動自行編譯更新源碼套件)。 RHEL6 使用 yum 光碟安裝軟體步驟: 1. 掛載 RHEL6 光碟 # mkdir /mnt/cdrom # mount /dev/cdrom /mnt/cdrom -t iso9660 -o loop,ro 2. 將光碟內的 media.repo 檔案內容複製到 /etc/yum.repos.d/media.repo # cat /mnt/
Benchmark
You can get OpenSSL to encrypt /dev/zero with a randomized password, giving decent pseudorandom data very fast (if your CPU supports accelerating it). openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64)" -nosalt </dev/zero
Bike
Browser
Problem: Whenever you access any website from a specific domain. For example http://www.abc.com/morepages/…. In the URL above, the domain is “abc.com” and “morepages” is a sub-site. The problem shows as the following: Bad Request Your browser sent a request that this server could not
HOWTO: Using Dell iDRAC 7 Lifecycle Controller 2 to update Dell PowerEdge R420, R620, and R720 servers Newer Dell Servers have an option as part of their iDRAC v7 (Dell Remote Assistance Controller) to include a “Lifecycle Controller” v2. This feature can be utilized to provide updates to all firmware
Benchmark
因工作需要找一個可以取代IOmeter業界慣用的IO效能評測軟體，過去為了某些測試有初略使用了fio 這個軟體，現在要來進階了。之前用的版本是1.5.x版，現在用的是2.0.7版這兩版在測試結果的輸出上欄位不同，2.0.7版多了更多欄位這裡不細述。 為了方便定義出多種測試pattern，決定使用參數的方式而不用profile file，範例如下： fio –name=$name –rw=${iomode} –direct=1 –ioengine=libaio –runtime=30s –ioscheduler=noop –filename=/dev/$target –bs=${block} –size=80% –iodepth=${iodepth} –zonesize=$[size/stream]k –numjobs=$stream –group_reporting –minimal >>
configuration
$vim /etc/multipath.conf defaults { udev_dir /dev polling_interval 10 max_fds 8192 fast_io_fail_tmo 80 dev_loss_tmo 600 user_friendly_names yes } blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" devnode "^hd[a-z]" devnode "
query IPMI Status: # $ISHOME/bin/ipmitool -H $IP -U $USER -P $PASS chassis power status IPMI operation: [ on | off | cycle | reset ] # $ISHOME/bin/ipmitool -H $IP -U $USER -P $PASS chassis power [ on | off | cycle | reset ] 2>&1
1. launch IPStor Java GUI console 2. click the Server node that you'd like to enable console support mode 3. Navigate to Help -> About IPStor Console 4. input "techsupporton" then hit Enter
http://youtu.be/tLFo-ERdiyQ You could do the following steps to test IPStor USB Recovery image 1. configuration repository is enabled , stored in FC device 2. run savetorepository.sh 3. restart ipstor services 4. get the configuration from IPStor configuration repository and check the content 5. delete root directory