bbu extras

disk with array card, cache policy, Bbu battery, raid-10,15krpm阵列卡从容面对多块机械盘，BBU电池保障高性能模式下的Cache策略不丢数据Cache策略选择Write Back甚至Always Write Back阵列预读的Read Policy选项，选择Normal使用RAID-10,性能高于RAID-5使用15KRPM高速磁盘，性能高于7.2KRPM磁盘Server hardware setup parameters from IBM x3650m3System-Level optimizationThere are also several areas of the operating system that deserve optimization, as well as significantly improved IOPS perf

boost: 1, the use of SSD or PCIe SSD devices, at least hundreds of times times or even tens of times the IOPS increase; 2, the acquisition of the array card with the cache and the Bbu module, can significantly increase the IOPS (mainly refers to mechanical disk, SSD or PCIe SSD except. At the same time, the health of the cache and the Bbu module should be checked periodically to ensure that the data is not

; How RAID guarantees Data security BBU (Backup Battery Unit) Ensure that data is secured by writing data from the cache to disk, even when the server is powered down or down, in case of battery power Precautions What are the considerations for MySQL? Deployment installation for MySQL MySQL Monitoring MySQL parameter tuning Requirements for deploying MySQL Recommended MyS

mirror system uses the connecting IP address of the client and the# update status of each mirror To pick mirrors that is updated to and# geographically close to the client. You should use this for CentOS updates# unless is manually picking other mirrors.## If the mirrorlist= does For your, as a fall back you can try the # remarked out Baseurl= line instead.##[base]name=centos-$releasever-basemirrorl ist=http://mirrorlist.centos.org/?release= $releasever arch= $basearch repo=os#baseurl=http://

key/value pairs ---I. putExtra ("str1", "This is a string ");I. putExtra ("age1", 25 );// --- Use a Bundle object to add new key/values// Pairs ---Bundle extras = new Bundle ();Extras. putString ("str2", "This is another string ");Extras. putInt ("age2", 35 );// --- Attach the Bundle object to the Intent object ---I. putExtras (

.com/centos/$releasever/updates/$basearch/http:// centos.ustc.edu.cn/centos/$releasever/updates/$basearch/http://mirror.neu.edu.cn/centos/$releasever/updates/$ Basearch/gpgcheck=1gpgkey=http://mirror.centos.org/centos/rpm-gpg-key-centos-6#additional packages that could be useful[extras]name=centos-$ releasever-extrasmirrorlist=http://mirrorlist.centos.org/?release= $releasever arch= $basearch repo= extras#b

encapsulation methods such as string [] and arraylist Scenarios returned with parameters:Activity1:Bundle newextras = new bundle ();If (cropvalue. Equals ("circle ")){Newextras. putstring ("circlecrop", "true ");}Intent cropintent = new intent ();Cropintent. setdata (IMG. fullsizeimageuri ());Cropintent. setclass (this, cropimage. Class );Cropintent. putextras (newextras );/* Pass through any extras that were passed in */Cropintent. putextras (myextr

[JIRA] Jira4 and Jira6 series cracking practicesPreface: JIRA is a popular Java-based management system. Because Atlassian provides defect tracking services for many open-source projects for free, it is widely used in the open-source field, its Cognition is much higher than other products, and it is easier to use. At the same time, open source is another feature. When users buy their software, they also purchase source code to facilitate secondary development. However, the free version only has

[Root @ localhost usr] # yum install javaLoaded plugins: fastestmirror, refresh-packagekit, securityRepository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository extras is listed more than once in the configurationRepository centosplus is listed more than once in the configurationRepository contrib is listed more than once in the configurationLoading mirror speeds from cached ho

Installing the crontab service in CentOSToday, when I configured crontab on the test machine, I found that it was not installed, so I had to install one quickly.CentOS version: 5.7Procedure1. Check whether crontab is installed:Execute the crontab command. If command not found is reported, it indicates that the crontab is not installed.2. Install crontabRun yum install-y vixie-cron3. confirm whether the installation is successful: Execute crontab-e 4. Check whether Automatic startup is enabled.

The intent features are:To add a listen event for Button 1 in mainactivity: Listener1 = new Onclicklistener () { @Overridepublic void OnClick (View v) {TODO auto-generated Method StubIntent intent1 = new Intent (mainactivity.this, Activity1.class);Intent1.putextra ("Mainactivity", "This is data from mainactivity");Startactivityforresult (Intent1, Request_code);}}; Receive data from intent in mainactivity in Activity1: String data = null;Bundle

Modify/etc/yum.repos.d/centos-base.repo # Centos-base.repo # # The Mirror system uses the connecting IP address of the client and the # Update status of each mirror to pick mirrors, are updated to and # Geographically close to the client. You are should use this for CentOS updates # Unless you are manually picking the other mirrors. # # If The mirrorlist= does not work for your, as a fall back you can try the # remarked out Baseurl= line instead. # # [Base] name=centos-$releasever-b

-level embedded battery UPS, respectively 3 (a) to (d). Similarly, in these four application architectures, the placement of batteries varies greatly, from centralized power battery rooms at the data center module level to semi-distributed battery cabinets at the micromodule level, go to the distributed battery BBU at the cabinet level, and then to the component-level lithium battery package at the server level. The Construction Scale of UPS and batte

When a traditional outward scaling method becomes popular for MySQL, let's see what we have to expand (cheap memory? Quick storage? Better power supply efficiency ?) It will become very interesting. There are indeed many options here-I may encounter a customer using the Fushion-IO card every week. However, I saw an interesting option for them-they chose to buy an SSD and they could still read many pages per second (at this time, I would rather choose to purchase memory instead ), the storage dri

minimum of only 18W. 　　Fronthaul Microwave Solution At present, the new generation of microwave products can easily achieve the gigabit rate of transmission capacity. With the development of microwave technology and the opening of new spectrum resources, the transmission capacity of microwave products is further improved, the variety of products is more diverse, and the microwave application scene is more extensive. Rely on microwave products stable and reliable performance and large capacity

generation of GSM, TDMA is a multiple access way, Gmsk for modulation, duplex mode is based on FDD TDD, the core network of CS domain as the main mobile communication system, and GSM "evolution", the so-called WCDMA, CDMA is a multiple access mode, QPSK for modulation, The duplex mode is FDD, the core network has the CS domain on the basis of the introduction of PS domain. The evolution of WCDMA to FDD is also universally accepted, but WCDMA and FDD technologies are not more correlated than TD

settings menu, Enable node interleaving to avoid NUMA issues;1.2. Disk I/O relatedThe following are some of the measures that can be optimized for disk I/O, based on the magnitude of the IOPS performance boost: 1, the use of SSD or PCIe SSD devices, at least hundreds of times times or even tens of times the IOPS increase; 2, the acquisition of the array card with the cache and the Bbu module, can significantly increase the IOPS (mainly refers to mech

1, hardware layer-related optimization 1.1. CPU Related In the server's BIOS setup, you can adjust the following configurations to maximize CPU performance or avoid classic NUMA issues: (1), select Performance per Watt optimized (DAPC) mode, play CPU maximum performance, run DB This usually requires high computational services do not consider power-saving;(2), turn off C1E and C states and other options, the purpose is to enhance CPU efficiency;(3), Memory Frequency (Memory frequency) Select

, the use of SSD or PCIe SSD devices, at least hundreds of times times or even tens of times the IOPS increase;2, the acquisition of the array card with the cache and the Bbu module, can significantly increase the IOPS (mainly refers to mechanical disk, SSD or PCIe SSD except. At the same time, the health of the cache and the Bbu module should be checked periodically to ensure that the data is not lost duri

performance increase:1, the use of SSD or PCIe SSD devices, at least hundreds of times times or even tens of times the IOPS increase;2, the acquisition of the array card with the cache and the Bbu module, can significantly increase the IOPS (mainly refers to mechanical disk, SSD or PCIe SSD except. At the same time, the health of the cache and the Bbu module should be checked periodically to ensure that th