ceph releases

This section reads as follows:Increase Monitoring NodeAdding OSD NodesRemove the OSD node1: Increase monitoring nodeHere we use the last environment, to increase the monitoring node is very simpleLet's get the Monitoring node environment ready: Change the Hosts file and hostname, and update the hosts file for the Deploy nodeOn the Deployment nodeCD first-ceph/Ceph-deploy new Mon2 Mon3//here refers only to w

Tag: Ceph Storage Umount ErrorPhenomenon: [Email protected]:~# Umount/mnt/ceph-zhangboUmount:/mnt/ceph-zhangbo: The device is busy.(In some cases lsof (8) or fuser (1)) can be foundUseful information about processes that use the deviceWorkaround:1, according to the above tips, we use Fuser to check the use of the situation[Email protected]:~# fuser-m/mnt/

As Ceph is increasingly used in various storage business processes, its performance and tuning strategy has become a topic for users to pay close attention to, one of the key factors affecting performance is the OSD storage engine implementation; The Ceph base component Rados is a strong consistent, object storage System, The storage engines supported by its OSD are as follows:The ObjectStore layer encapsul

Edit Crush Map:1, obtain crush map;2, anti-compilation crush map;3. Edit at least one device, bucket, rule;4, recompile crush map;5, re-inject crush map;Get Crush MapTo get the crush map of the cluster, execute the command:Ceph OSD Getcrushmap-o {Compiled-crushmap-filename}Ceph will crush output (-O) to the file you specify, and because crush map is compiled, it needs to be recompiled;Anti-compilation Crush mapTo decompile the crush map, execute the c

Ceph1:VI/etc/hosts (on all nodes)127.0.0.1 localhost192.168.1.15 ceph1192.168.1.16 ceph2192.168.1.17 ceph3Ssh-keygen-Q-t rsa-f ~ /. Ssh/id_rsa-C ''-N''VI ~ /. Ssh/configHost ceph2Hostname ceph2User RootStricthostkeychecking NoHost ceph3Hostname ceph3User RootStricthostkeychecking NoSsh-copy-ID ceph2Ssh-copy-ID ceph3 To get latest CEpH-deploy: Wget-Q-o-'https: // ceph.com/git /? P = CEpH. Git; A = blob_plai

Crush Algorithm1, the purpose of crushOptimize allocation data, efficiently reorganize data, flexibly constrain object copy placement, maximize data security when hardware fails2. ProcessIn the Ceph architecture, the Ceph client is directly read and written to the Rados Object stored on the OSD, so ceph needs to go through (pool, Object) → (pool, PG) →osd set→osd

Ceph-dokan compiled using the following is compiled on the Win7 64-bit machine, running 1. Download the source code, compile can refer to the inside of the readme.md Https://github.com/ketor/ceph-dokan 2. Download TDM-GCC and install, select 32 bit (default) when installing Https://sourceforge.net/projects/tdm-gcc/files/TDM-GCC%20Installer/tdm-gcc-5.1.0-3.exe/download 3. Download and install Dokan, select v

Comparison of five Linux releases, Linux releasesUbuntu Whether you are a new user planning to get your first computer, or someone migrating from Windows or Mac OS X, Ubuntu shoshould be your first choice. it's extremely easy to install and manage; everything just works out of the box. there are hundreds and thousands of applications available for Ubuntu users, which makes it even more appealing. and the Ubuntu community is extremely friendly so if yo

1. RBD LS View the image of the Ceph default resource pool RBD2.RBD Info xxx.img View xxx.img specific information3.RBD RM xxx.img Delete xxx.img4.RBD cp aaa.img bbb.img copy image aaa.img to Bbb.img5.RBD rename aaa.img bbb.img rename aaa.img to Bbb.img6.RBD Import aaa.img The local aaa.img into the Ceph cluster7.RBD Export aaa.img aaa.img the Ceph cluster to a l

0. IntroductionThis article describes how to configure the cache pool tiering. The role of the cache pool is to provide a scalable cache for caching Ceph hotspot data or for direct use as a high-speed pool. How to create a cache pool: First make a virtual bucket tree from an SSD disk,Then create a cache pool, set its crush mapping rule and related configuration, and finally associate the pool to the cache pool that you need to use.1. Build SSD bucket

Note: All operations below are performed at the admin node1, prepare three virtual machines, one as the admin node, the other two as the OSD node, and corresponding with the hostname command to modify the hostname to ADMIN,OSD0,OSD1, and finally modify the/etc/hosts file as shown below127.0.0.1 localhost10.10.102.85 admin10.10.102.86 osd010.10.102.87 OSD12. Configure password-free accessSsh-keygen //press ENTER to generate a public key to Ssh-copy-id-i/root/.ssh/id_rsa.pub

The Ceph Crush algorithm (controlled Replication under Scalablehashing) is an algorithm based on data distribution and replication for random control.Basic principle:Storage devices typically support stripe to increase storage system throughput and improve performance, and the most common way to stripe is to do raid. As RAID0.The data is distributed in strips on the hard disk in the array, which is the stored procedure of the data in all the hard driv

[TOC]k8s Mount Ceph RBDk8s Mount Ceph RBD There are two ways, one is the traditional way of PVPVC, which means that the administrator needs to pre-create the relevant PV and PVC, and then the corresponding deployment or replication to mount the PVC use. After k8s 1.4, Kubernetes provides a more convenient way to dynamically create PV, that is, Storageclass. Using Storageclass, you do not have to create a fi

1. Environmental descriptionWith Kolla deployed Ceph, since the OSD 0 occupies the SATA 0 channel, the system disk needs to be swapped with the OSD 0 jumper, after the jumper switch, the OSD 0 does not start properly.2, Reason analysis:Before switching jumpers, the device file of the OSD 0 is/dev/sda2, the switch jumper becomes/dev/sdc2,osd at startup,--osd-journal/dev/sda2, specifies the log device, because the log partition device name becomes/DEV/S

1. Introduction to the basic Environment Ubuntu12.04.5 OpenSSH all require the default installation source nodeceph0.80.4 ceph-admin Management and Client node,ceph01,ceph02,ceph03 cluster node, network gigabit:192.168.100.11 cluster node hard disk needs 3 of them. The above is the basic configuration2. Deploy the 3 -node ceph environment with ice installation calamari-server,

IntroductionI need direct programmatic access to Ceph's object storage to see the performance difference between using gateways and without gateways. Examples of access based on Gate-way have gone through. Now the test is not to go to the gateway, with Librados directly with the Ceph cluster.Environment configuration1. Ceph cluster: You have a ceph cluster that i

If you need to add a host name: OSD4 ip:192.168.0.110 OSD1. Create a directory for Mount directories and placement profiles in OSD4SSH 192.168.0.110 (this is from Mon host ssh to OSD4 host)Mkdir/ceph/osd.4Mkdir/etc/ceph2. On OSD4, format the EXT4 Sda3 partition, mount the partition.Mkfs.ext4/dev/sda3Mount-o User_xattr/dev/sda3/ceph/osd.43. The id_dsa.pub of the Mon host is copied to the OSD4 host for passwo

[Analysis] Ceph programming instance interface Librbd (C ++) -- image creation and data read/write, cephlibrbd Currently, we have two ways to use Ceph Block Storage :?-Use QEMU/KVM to interact with Ceph Block devices through librbd. This mainly provides block storage devices for virtual machines, as shown in ;? -Use the kernel module to interact with the Host

1. Description of the problem after doing the iptables strategy today and restarting one of the machines in the cluster, the input ceph-s discovers the following conditions: [[email protected] ~]# ceph-s2015-09-10 13:50:57.688516 7f6a6b8cc700 0 monclient (Hunting): Authenticate timed out AF ter 3002015-09-10 13:50:57.688553 7f6a6b8cc700 0 librados:client.admin authentication error (+) Connection timed O U

RBD is a block device provided by Ceph, this article will briefly introduce its implementation principle. Ceph official documentation tells us that Ceph is essentially an object store. It is also understood that ceph block storage is actually handled by several objects at the client. In other words, for