ceph cluster

Ceph practice summary: the configuration of the RBD block device client in Centos, cephrbd Before proceeding to this chapter, you need to complete the basic cluster building, please refer to the http://blog.csdn.net/eric_sunah/article/details/40862215 Ceph Block devices are also calledRBDOrRADOS. Block Device During the experiment, a virtual machine can be used

static Hsah function specified by the Ceph cluster, obtaining its hash value.2) The hash value is manipulated with mask to obtain the PG ID.From the PG mapping to the data store is a few unit OSD, the mapping is determined by the crush algorithm, the PG ID as the input of the algorithm, the collection of n OSD is obtained, the first OSD is used as the main OSD, the other sequence as from the OSD.Note: The

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

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

Dear friends, "the first phase of the Ceph China Community Training Course Open Class" Basics of Ceph Foundation and its principles and basic deployment1. Take you into the Ceph world, from principle to practice, so you quickly build your own ceph cluster.2. Take you step by

of civetweb as a webserver to implement HTTP request acceptance and response without the need to configure complex fcgi and webserver.1 Creating a storage poolConfirm that your ceph cluster is functioning properly with the ceph-s command and that the cluster status is OK.Run the following command to create the storage

1. Overview The entire deployment architecture of calamari can be simplified to the following illustration, including the client and calamari systems. The calamari system consists of the calamari server and the agents running on the Ceph cluster. The agent keeps sending data to the Calamari server, which stores the data in the database. The client can connect the Calamari server through the HTTP protocol a

, the same old, or the Hosts file and host name do well;Here we add a hard disk to each of the two new nodes, do not partition and formatCeph-deploy OSD Prepare Osd3:/dev/vdb Osd4:/dev/vdbCeph-deploy OSD Activate OSD3:/DEV/VDB1 osd4:/dev/vdb1Copy configuration files and key filesCeph-deploy Admin OSD3 osd4Ceps-s look at the effect3: Remove the OSD nodeThe steps to remove the OSD daemon are in 4 steps:(1. Freeze the OSD that needs to be removedCeph osd out {Osd-num}(2. Observe the automatic migra

Operation: The Ceph cluster expands several nodes.Anomaly: When the Ceph cluster synchronizes, the OSD process is always abnormally down (after a period of time data is synchronized).Ceph Version: 9.2.1Log:July 2509:25:57ceph6ceph-osd[26051]:0>2017-07-2509:25:57.471502 7f46f

Telegraf is a collection of monitoring agents, there are support to collect a variety of data plug-ins such as Ceph,apache,docker,haproxy,system, but also support a variety of output plug-ins such as Influxdb,graphite and so on.Influxdb is a time series database and is used for monitoring scenariosGrafana is a great drawing tool.The combination of the three has three main processes: Nbsp;1. The Telegraf installed on all nodes of the

The last mapping is to map the PG where the object resides to the actual storage location on the OSD. Here is the crush algorithm, through the crush algorithm can be pgid to get multiple OSD (with configuration). Because we don't talk too much about how crush is done, we can think of a different way of thinking about what crush is doing. If we don't have to crush with a hash? We also apply the above formula hash (pgid) mask = Osdid can be implemented? If we also use the hash algorithm to gener

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

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 cep