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Knowledge about Inode and Block in Centos

% /dev/shm /dev/sda1 477M36M416M8% /boot View the total Inode and Block usage of the current system partition: [root@techW~] #dumpe2fs/dev/sda1|grep-i"blocksize" dumpe2fs1.41.12(17-May-2010) Blocksize:1024 [root@techW~] # [root@techW~] # [root@techW~] #dumpe2fs/dev/sda1|grep-i"inodesize" dumpe2fs1.41.12(17-May-2010) Inodesize:128 ### The boot partition is 128, and the general partition is 256. [root@techW~] # [root@techW~] # [root@techW~] #dumpe2fs/dev/sda1|grep-i"inodecount" dumpe2fs1.41.12(1

Backup and recovery solution for small and medium databases rman catalog (1)

current ";Backup as compressed backupset archivelog all delete input tag = 'archbk ';Release channel identifier;Release channel ch2;} -- Author: Robinson Cheng-- Blog: http://www.bkjia.com RMAN> print global script global_del_obso; Printing stored global script: global_del_obso{Allocate channel specified device type disk;Delete noprompt obsolete redundancy 1;Release channel identifier;} RMAN> print global script global_inc0; Printing stored global script: global_inc0{Configure retention policy

Solve the problem that Oracle archive log is full

. Then, it was very violent to delete all the directories in the folder named 2013.1 rm-rf 2013 _* Finished. Start the database Sqlplus sys/pass as sysdba SQL> startup The first time I startup failed, the ORA-03113: end-of-file on communication channel was prompted. I re-executed it.SQL> startup mount Successful. Fix related information with rmanRman target sys/passRMAN> delete expired archivelog all; Return to sqlplus to modify the archivelog size.SQL> alter system set db_recovery_file_dest_siz

Automatic SUSE installation Based on AutoYaST

/autoinst.xml /tmp/sles11 # Edit the isolinux. cfg file and find the # install location cd boot/x86_64/loader/ vi isolinux.cfg # install append initrd=initrd autoyast=file:///autoinst.xml splash=silent showopts :x! # Run the mkisofs command to generate an automatic installation disc cd /tmp/sles11 mkisofs -R -o /tmp/SLES11-SP2-64-AUTO.iso -b boot/x86_64/loader/isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table . My configuration file pre-partitioning Nam

Modify SGA operations under RAC

open View the SGA information of instance 2[Oracle @ wtdb2 ~] $ Sqlplus/As sysdba SQL> show parameter SGA; Name type value-----------------------------------------------------------------------------Lock_sga Boolean falsePre_page_sga Boolean falseSga_max_size big integer 8gSga_target big integer 5g SGA modified B. Modify the SGA of instance 1 Disable instance 1[Oracle @ wtdb1 ~] $ Srvctl stop instance-D pdmcn-I pdmcn1 Check instance stat

My Opinion on iCloud

is very flattering. having said so much, iCloud seems to be something like a network disk, but there is only one more backup and push update. actually not. although the 5g space is provided to users for free, users cannot "directly" Use it. what I call "direct" means that, like Dropbox, a client allows users to store any file. but iCloud doesn't work. You can store files, but you must use a program. correspondingly, apps with the iCloud function can

Overview of PCI-express bus standard from 1.0 to 3.0

, supports hot swapping, supports synchronous data transmission, bandwidth optimization for priority transmission data. PCI-E 1.0 specifications: PCI-E 1x (1.0 standard) using one-way 2G baud rate for transmission, because each word segment is 10 bits (one start bits, eight bits, one second bits ), therefore, the transmission rate is 2.5g/10 = 250 Mb/s (250 MB per second), it can be calculated that the one-way transmission rate of PCI-E 16 X is 250 MB/S * 16 = 4 Gb/s, the bidirectional

[Original] detailed process of installing Ubuntu 12.04 with Vmware 8 (illustration)

list. Click "OK" Note:: "/" Is recommended to be 5 Gb or above. (Based on multiple articles about "ubuntu manual partitioning) Note:The last time I got a 6 GB package, I went into libraries and it was full. It was a tragedy! Therefore, do not think of ubuntu as 5g or above. Ubuntu should occupy 4 or 5G, but at least 8g or above. 20g is indeed not big, however, if you are planning to be a long-term employe

BandwagonHost bricklayer VPS: 9.99 MB of memory added to the Los Angeles data center. The annual fee is USD 3.99 for multiple value-added packages. The annual fee starts with USD.

BandwagonHost bricklayer VPS: 9.99 MB of memory added to the Los Angeles data center. The annual fee is USD 3.99 for multiple value-added packages. The annual fee starts with USD. The bricklayer VPS adds the Los Angeles data center. I believe this will arouse the purchasing desire of many Chinese people. Previously, we introduced the four premium packages separately. Here we put them in the past, and placed this post to the top, so that you can easily view and purchase them. The latest 1 GB memo

BandwagonHost bricklayer VPS: 9.99 MB of memory is added to the Los Angeles data center. The annual fee is USD 3.99 for various value-added packages, starting with USD for annual payment. bandwagonhostvps

BandwagonHost bricklayer VPS: 9.99 MB of memory is added to the Los Angeles data center. The annual fee is USD 3.99 for various value-added packages, starting with USD for annual payment. bandwagonhostvps The bricklayer VPS adds the Los Angeles data center. I believe this will arouse the purchasing desire of many Chinese people. Previously, we introduced the four premium packages separately. Here we put them in the past, and placed this post to the top, so that you can easily view and purchase t

Fatigue Relief dietary conditioning

consequences and cause serious problems.It's too late. Therefore, pay attention to the symptoms of excessive fatigue (sub-health status) at any time.In combination with Yi, you may wish to enjoy the anti-fatigue diet, which may give you a feeling of relaxation and fatigue. Radish soup Raw materials: 15g of asparagus, 300g of radish, 150g of ham, 5g of chopped green onion, 3g of salt, 1g of MSG and pepper, chicken soup500. Make: Cut aspart into 2-3mm

Install ubuntu with vmware in win7

" to manually partition the 20 GB hard drive of the VM. 20. click "New Partation Table" (create a partition Table) 21. in the pop-up dialog box, select "Contunie" 22. select the new free space and click Add" 23. note "Primary", "Beginning", "Ext4... "Are default, do not need to modify; number is the size, in MB (note: do not pursue 1024, the hard disk is actually not neat ...), Select 10000 = 10 GB. select "/" from the "Mount point" drop-down list. click "OK" Note:: "/" Is recommended to be

Detailed diagram of CentOS6.3 (x86_64) installation process

download CentOS system file resources. the speed depends on your bandwidth. it is not recommended. Minimal. Bin-DVD: This file contains the complete CentOS functionality, as bin-DVD1.iso (4G) + bin-DVD2.iso (1G) = 5G, need to download 5G such a large iso file, the network of the main company cannot afford to stop. There is another EFI. here, google also dug ibm information and found that it is not needed.

Summary of Wireless Interference avoidance and reduction methods

AP signals of the same channel can be ignored without affecting the reception in their respective ranges. When the CCA gate is increased, even if the neighboring AP of the same channel sends a signal, as long as the signal strength does not exceed the CCA threshold, the AP can still send its own signal. At this time, as long as the signal reaches the Client to meet the SNR requirement, it can still be correctly received by the Client. Methods for avoiding and reducing Wireless Interference 4.

Solution to various errors reported during 6 GB database import _ MySQL

6 GB database import reports various errors solution bitsCN.com Tool selection I. Sqlyog is a powerful tool, but in the face of a 5G database, it can only strike, simply put, the local import can be, from the local import server can not. II. Phpadmin comes with this, but it's okay, but it's never used in the end, because it's invisible, because up to 50 MB, although you can modify the configuration file to upload but 5 GB, forget it, no confidence. 3

Homework (7th,mar.)

First question:1 /*2 defines a fruit class (fruit), which has3 properties: Color, price, weight (weigth),4 Define a 5 Create an Apple object, the color is "red", the price is 5.5, weight 10g. 6 then create a banana (banana) object, the color is "yellow", the price is 4.2, weight 5g. 7 final output: Apple's color, price, weight,8 Banana color, price, weight,9 */Ten Packagehomework; One Public classFruit A { - PrivateString name; - the Pr

CentOS 6.4 Installation (Super detailed illustration tutorial)

skip the test.The following interface appearsNextSelect language: Chinese (Simplified) NextSystem operation and maintenance www.osyunwei.com warm reminder: qihang01 original Content © Copyright, reproduced please indicate the source and the original linkKeyboard selected as: American English styleNextSelect the first item, basic storage deviceNextSelect the first item: Yes, ignore all dataNextSet host name, default, or customizeTime Zone Selection: Asia/ShanghaiCancel the tick before the system

Redis Persistence and common failures

:1448944451rdb_last_ Bgsave_status:okrdb_last_bgsave_time_sec :85rdb_current_bgsave_time_sec:33:0aof_rewrite_in_progressaof_rewrite_scheduled:0aof_last_rewrite_time_sec:-1aof_current_rewrite_ Time_sec:-1aof_last_bgrewrite_status :okaof_last_write_status:ok With the REDIS-CLI Info command, you can see the value of the "rdb_last_bgsave_time_sec" parameter,This value indicates the time when the last Bgsave command was executed. In the case of disk IO quantification, the larger the amount of memor

Industrial Technology Innovation Capacity Development Plan (2016-2020)

circuits, supercapacitors, connectors and other key electronic components technology, to meet the internet of things, smart home, environmental monitoring, automotive electronics and other applications demand a variety of sensitive components and sensors, micro-, integrated, intelligent, networked sensors, Low cost fiber optic cable, fiber preform, key optical device, quartz crystal oscillator, connector and cable assembly.Information and communication equipment: the use of domestic security co

Percona Toolkit Study (iii) (Pt-duplicate-key-checker,)

-p123456-h127.0.0.1--connection-id ' \d_\d+_ (\d+) $ ' - -server-id ' \d_ (\d+) _\d+$ ' --exec-plus "droptable%s" Find the empty table in junk and test and delete Pt-find -uroot-p123456-h127.0.0.1--emptyjunktest--exec-plus "drop table%s "Find tables in the library that are larger than 5G pt-find--tablesize+5g find all the table and index sizes and print the sort pt-find--user=root-- password=123456-h127.0.0

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