ceph hardware

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Android from hardware to application: Step by Step 3-Hardware Abstraction Layer access hardware driver

Android from hardware to application: Step by Step 3-Hardware Abstraction Layer access hardware driver The Android standard hardware driver is divided into two parts: one is the hardware driver running in the Linux kernel, and the other is the

Ceph installs various error

[Ceph_deploy] [ERROR] Runtimeerror:failed to execute Command:ceph-disk-activate–mark-init sysvinit–mount/dev/sdb1To be honest, the question is two.I put the OSD in a separate partition SDB executes the commands that are:Ceph-deploy OSD Prepare NETWORK:/DEV/SDB1Ceph-deploy OSD Activate NETWORK:/DEV/SDB1The above is wrong.The right thing isCeph-deploy Osd–zap-disk Create Network:sdbCeph-deploy OSD Prepare NETWORK:/DEV/SDB1:/DEV/SDB2Ceph-deploy OSD Activate NETWORK:/DEV/SDB1:/DEV/SDB2The problem is

Ceph for finishing

Have you modified/sys/block/sdk/queue/read_ahead_kb read_ahead?Modified to 8192, the default value is 128;is the SATA disk OSD changed to 8192? How much of a performance boost?In addition, this value should be modified at any time, right? Can it be dynamically adjusted after deployment?What effect will it have on the OSD?can improve read performanceCan be modified in real timeWhat does this parameter mean?Pre-read bytes?This parameter is useful for sequential reads, meaning how much content to r

From hardware negative profit to hardware free, le vision with ecological anti-depth transformation of traditional hardware industry

March 30, le Vision in Beijing a conference to make the entire smart TV industry "Restless", in addition to the release of the 4th generation of Super TV, le Vision also announced a heavy program------"414 Hardware free Day", according to the plan, the April 14 will push 4 X55 curved Project Commemorative Version/ Super TV x40s/x43s and other gift products, users do not need to pay for hardware. How can thi

Ubuntu 14.04-devstack + OpenStack +ceph Unified Storage

=${ceph_replicas:-1}remote_ceph=falseremote_ceph_admin_key_ Path=/etc/ceph/ceph.client.admin.keyringenabled_services+=,g-api,g-regenabled_services+=,cinder,c-api,c-vol, C-sch,c-bakcinder_driver=cephcinder_enabled_backends=cephenabled_services+=,n-api,n-crt,n-cpu,n-cond,n-sch, n-netdefault_instance_type=m1.microenable_servicehorizondisable_servicen-netenable_service q-svcenable_serviceq-agtenable_serviceq-dhcpenable_serviceq-l3enable_service Q-metaenab

Ceph Learning PG

Calculation formula for PG: Calculation formula for the entire cluster PG The calculation formula for PG in each pool: Total PGs = (TOTAL_NUMBER_OF_OSD *)/Max_replication_count/pool_count The result of the settlement is taken up to the value of the n-th square of the 2. For example, the total number of OSD is 160, the number of copies of the number of 3,pool is also 3, then the result is calculated according to the above formula is 1777.7. Take 2 of the n-th is 2048, then the number

Ceph Series--ISCSI Configuration Summary

A 192.168.199.128 (Ceph back-end)------(Ceph client) B 192.168.199.132 A on configuration: Install TGT service, apt-get install TGT-RBD IQN command format: iqn. 2. Command line creation: Tgtadm--lld iSCSI--mode Target--op new--tid 1--targetname iqn.2016-08.com. Example:iscsi Configuration on B: Install iSCSI client, Apt-get install OPEN-ISCSI discover target iscsiadm-m discovery-t sendtargets-p 192.168

Openstack&ceph Configuration using RBD cache

Environment DescriptionOpenstack Icehouse Ceph 0.87 Configuration Steps Configuring Ceph Add the following to the ceph.conf configuration file RBD cache = True RBD cache Writethrough until Flush = True RBD Cache also has some configuration properties that can be changed as needed #rbd Cache size #rbd cache max Dirty #rbd cache target Dirty Configure OpenStack Add the following to the [Defa

Ceph Object Gateway Admin API gets user list issues

return {code:403, Message:forbidden} When using the admin Ops API to get user list Get/admin/user by official documents Here are two questions: the first user list request is as follows: Get/admin/metadata/usersecond, you need to configure the metadata read permissions for the administrative user: Radosgw-admin caps Add--uid=admin--caps= "Metadata=read"Bottom line: #You must use Get/admin/metadata/user to fetch the user list (with metadata capabity).Cep

centos6.5 KVM and Ceph integration problem solving

The following action is to define an XML file on centos6.5 cat>>secret.xmlThis article is from "A Good person" blog, please be sure to keep this source http://egon09.blog.51cto.com/9161406/1812368centos6.5 KVM and Ceph integration problem solving

Use the Cosbench tool to perform stress testing on the Ceph S3 interface

"] Runtime Integral type 0 How long it takes to run Rampup Integral type 0 How long it takes to start all of the concurrency, with JMeterConflicts with runtime and cannot be combined with Rampdown Integral type 0 The end number, and the runtime can not be combined with Uploading dataXML version= "1.0" encoding= "UTF-8"?> - Workloadname= "PUT-100WORKERS-4MB"Description= "Sample benchmark for S3">

Detects hardware batch commands, detects hardware bat, and obtains computer hardware information with one click

Warning: Running bat source code is a dangerous action, if you are unfamiliar, please do not try!Batch processing language: Simplified ChineseLicensing method: Free softwareOperating Environment: Windows platformDetects hardware batch commands. One click gets. Double-tap to view@echo offcolor 0atitle Hardware detectionModeCon cols=90SC config WinMgmtStart= Auto >nul 2Net StartWinMgmt 2>1nulsetlocalenabledel

Compile the JNI method for the hardware abstraction layer (HAL) module of Android in Ubuntu to provide the Java access hardware service interface (Lao Luo study note 4), androidjni

Compile the JNI method for the hardware abstraction layer (HAL) module of Android in Ubuntu to provide the Java access hardware service interface (Lao Luo study note 4), androidjni In the last two articles, we introduced how to write drivers for Android hardware, including how to implement kernel drivers in Linux kernel space and

Java Access Hardware Service interface is provided in Ubuntu authoring Jni method for Android hardware abstraction Layer (HAL) module

Article reprinted to CSDN community Luo Shenyang's Android tour, original address: http://blog.csdn.net/luoshengyang/article/details/6575988In the previous two articles, we described how to write drivers for the hardware of an Android system, including how to implement kernel drivers in Linux kernel space and implement hardware abstraction layer interfaces in user space. The purpose of both is to provide

Compile the JNI method for the hardware abstraction layer (HAL) module of Android in Ubuntu to provide the Java access hardware service interface (Lao Luo study note 4), androidjni

Compile the JNI method for the hardware abstraction layer (HAL) module of Android in Ubuntu to provide the Java access hardware service interface (Lao Luo study note 4), androidjni In the last two articles, we introduced how to write drivers for Android hardware, including how to implement kernel drivers in Linux kernel space and

Ogre hardware buffer (hardware cache)

· Definition In fact, this buffer zone is a storage area of malloc, but it is not as good as that of malloc, which is applied in the memory, and the buffer zone is in the GPU/AGP, and its write and read speed is faster. Generally, the hardware buffer is used as the vertex buffer, index buffer, and Pixel Buffer. · Use Hardware buffer management is the hardwarebuffermanager responsible for a

Conflict and solution of computer hardware Resources _ Hardware Maintenance

Typical manifestations of hardware resource conflicts: When you add New hardware or add new hardware after the system often no reason to crash, black screen, startup, no reason to enter safe mode; The sound card and mouse do not work properly or go completely; hold down the ALT key and double-click My Computer icon to view the system properties when an exclamatio

Android graphics-hardware acceleration (hardware acceleration) (5)

This article translated from: http://developer.android.com/guide/topics/graphics/hardware-accel.html View layer and animation When an application is accelerated by hardware, the hardware layer can deliver faster and smoother animations. It is not always possible to play an animation with complex drawing operations at 60 frames per second. In this way, you can use

Android graphics-hardware acceleration (hardware acceleration) (2)

This article translated from: http://developer.android.com/guide/topics/graphics/hardware-accel.html Determines whether a view object is accelerated by hardware. Sometimes, especially for custom view objects, It is very helpful for applications to know whether the current view object is accelerated by hardware. This judgment is particularly useful if the applicat

View hardware information in linux and hardware in linux

View hardware information in linux and hardware in linuxDmidecode | grep Name is used to view various hardware information of a machine, such as cpu, memory, and network card.Lshw-short | egrep 'cpu | 4GiB DIMM | eth'Lshw-short | grep '4gib DIMM '| wc-l check whether the disk is an ssd/Opt/MegaRAID/MegaCli/MegaCli64-PDList-aAll | egrep 'raw Size | SSD'View the me

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