openstack ceph

Highly Available Concept Level Chen Ben How to Achieve Classification The ha of OpenStack virtual machine ha compare application level ha,heat ha template component ha mysql ha Three ways-master-slave synchronization, Main and Standby mode three ways of two

DirectoryChapter 1th Introduction1.1 Document Description1.2 Reference documentsThe 2nd chapter the concept and principle of erasure code2.1 Concepts2.2 Principle3rd Chapter Introduction of CEPH Erasure code3.1 Ceph Erasure code use3.2 Ceph Erasure code Library3.3 Ceph Erasure code data storage3.3.1 Encoding block read

Ceph Cluster report Monitor clock skew detected error troubleshooting, resolvingThe alarm information is as follows:[Email protected] ceph]# ceph-wCluster ddc1b10b-6d1a-4ef9-8a01-d561512f3c1dHealth Health_warnClock skew detected on mon.ceph-100-81, mon.ceph-100-82Monitor Clock Skew detectedMonmap E1:3 Mons at {ceph-100

Extended development of ceph management platform CalamariI haven't written logs for nearly half a year. Maybe I am getting lazy. But sometimes writing something can help you accumulate it. Let's record it. I have been familiar with some related work since I joined the company for more than half a year. Currently, I am mainly engaged in the research and development of distributed systems. The current development is mainly at the management level and ha

[Email protected]:~# ceph OSD Tree # id Weight type name up/down reweight -1 0.05997 Root Default -2 0.02998 Host Osd0 1 0.009995 Osd.1 up 1 2 0.009995 Osd.2 up 1 3 0.009995 Osd.3 up 1 -3 0.02998 Host OSD1 5 0.009995 Osd.5 up 1 6 0.009995 Osd.6 up 1 7 0.009995 Osd.7 up 1 Storage nodeBefore you go any further, consider this: Ceph is a distributed storage system, regardless of the details

If you want to reprint please indicate the author, original address: http://xiaoquqi.github.io/blog/2015/06/28/ceph-performance-optimization-summary/I've been busy with the optimization and testing of ceph storage, and have looked at various materials, but it seems that there is not an article to explain the methodology, so I would like to summarize here, a lot of content is not my original, but to do a sum

1, modify the/etc/hosts, so that the host name corresponding to the IP address of the machine (if you choose a loopback address 127.0.0.1 seemingly cannot parse the domain name). Note: The following host name is monster, the reader needs to change it to its own hostname10.10.105.78 monster127.0.0.1 localhost2. Create a directory Ceph and enter3, prepare two block devices (can be hard disk or LVM volume), here we use LVM DD If=/dev/zero of=

Extended development of the Ceph management platform Calamari Close to the big six months did not write the log, perhaps it is more and more lazy. But sometimes writing and writing can make a deposit, or come back and record it. into adult college half a year, familiar with some related work, currently mainly engaged in the research and development of distributed systems, the current development is mainly to stay in the management level of development

The use case is simple, I want to use both SSD disks and SATA disks within the same machine and ultimately create pools pointing to SSD or SATA disks. in order to achieve our goal, we need to modify the crush map. my example has 2 SATA disks and 2 SSD disks on each host and I have 3 hosts in total. To revoke strate, please refer to the following picture: I. Crush Map Crush is very flexible and topology aware which is extremely useful in our scenario. we are about to create two different root

Ceph Cluster Expansion IP Hostname Description 192.168.40.106 Dataprovider Deployment Management Node 192.168.40.107 Mdsnode MON Node 192.168.40.108 Osdnode1 OSD Node 192.168.40.148

Ceph installation in CentOS (rpm package depends on installation) CentOS is a Community version of Red Hat Enterprise Linux. centOS fully supports rpm installation. This ceph installation uses the rpm package for installation. However, although the rpm package is easy to install, it depends too much, it is convenient to use the yum tool for installation, but it is greatly affected by the network bandwidth.

Ceph deadlock failure under high IO On a high-performance PC server, ceph is used for VM image storage. In the case of stress testing, all virtual machines on the server cannot be accessed. Cause: 1. A website service is installed on the virtual machine, and redis is used as the cache server in the website service. When the pressure is high (8000 thousand accesses per second), all the VMS on the host machin

CentOS is the community version of RedHatEnterpriseLinux. centOS fully supports rpm installation. this ceph installation uses the rpm Package for installation. However, although the rpm Package is easy to install, it depends too much, it is convenient to use the yum tool for installation, but it is greatly affected by the network bandwidth. In practice, if the bandwidth is not good, it takes a long time to download and install the tool, this is unacce