iscsi multipath

TGT + RBD + multiph I. Ceph installation Create RBD image, you can specify a format of 1 if you do not need to use some of the RBD features root@node1:~# RBD Create--size 10240 testrbd/foo1--image-format 1 View RBD Image Information root@node1:~# RBD Info testrbd/foo1 RBD image ' Foo1 ': Size 10240 MB in 2560 objects Order (4096 KB objects) block_name_prefix:rb.0.191657.2ae8944a Format:1 two. TGT installation, server-side installation support RBD tgt,ubuntu16.04 installation method root@node0:/e

RHEL5 multi-path Configuration 1. Check whether the software package is installed.[Root @ pcvmaster ~] # Rpm-qa | grep device-mapperDevice-mapper-libs-1.02.74-10.el6.x86_64Device-mapper-event-libs-1.02.74-10.el6.x86_64Device-mapper-multipath-0.4.9-56.el6.x86_64Device-mapper-1.02.74-10.el6.x86_64Device-mapper-event-1.02.74-10.el6.x86_64Device-mapper-multipath-libs-0.4.9-56.el6.x86_642 install

Failure phenomenon: Article reproduced from EMC Chinese Support forum PowerPath integrates multipath I/O, automatic load balancing, and path failover capabilities to make storage management easier. This article summarizes the use of PowerPath common commands for operational considerations, for host system administrators to the hba/path/port/disk device/Storage system to perform configuration, view, delete, save, restore and other operations

1. RPM Software Installation [Root@eurasiaxz ~]# RPM-IVH iscsi-initiator-utils-6.2.0.873-2.el6.x86_64 options and Parameters: -i:install meaning- V: Verbose view installation details

device-mapper-event-libs.x86_64 0:1.02.90-2.el6_6.1device-mapper-libs.x86_64 0:1.02.90-2.el6_6.1 device-mapper-multipath.x86_64 0:0.4.9-80.el6_6.3device-mapper-multipath-libs.x86_64 0:0.4.9-80.el6_6.3 device-mapper-persistent-data.x86_64 0:0.3.2-1.el6dhclient.x86_64 12:4.1.1-43.p1.el6.centos.1 dhcp-common.x86_64 12:4.1.1-43.p1.el6.centos.1Dracut.noarch 0:004-356.el6_6.1 Dracut-kernel.noarch 0:004-356.el6_6.1e2fsprogs.x86_64 0:1.41.12-21.el6 e2fsprogs

Char device Mychrdev is registered, major is 254 $ mknod/dev/mychrdev C ' DMESG | grep "char Device Mychrdev" | Sed ' s/.*major is//g ' 0 $ cat/dev/mychrdev $ echo "abcdefghijklmnopqrstuvwxyz" >/dev/mychrdev $ cat/de V/mychrdev abcdefghijklmnopqrstuvwxyz $./syscall-exam-user User process:syscall-exam-us (1433) Available space:65509 bytes Data len:27 bytes Offset in physical:cc0 bytes content by Mychrdev />ABCDEFGHIJKLMNOPQRSTUVWXYZ $ cat/dev/mychrdev ABCDE $

of the Bb-credit must be non-zero. If zero, the description can no longer receive or send frames.IP SANthe mainstream underlying protocol isISCSI, the agreement defines theTCP/IPnetwork send, receiveBlock(block)-level rules and methods for storing data. The sending side willSCSIcommands and data are encapsulated intoTCP/IPpackets are then forwarded through the network and received by the receiving side.TCP/IPpackage, revert it toSCSIThe command and data are executed and will be returned after c

--virtual hard disk for Hyper-V.Within Vsphere, a vmdk can be stored on an NFS share or on a block device (Fibre Channel or iSCSI) that is formatted as a VMware file system--vmfs.A single VMDK size limit is 2tb-512b, which means that there is a 2TB limit on all customer volumes. When a customer volume needs more than 2TB of space, the storage needs to be rendered by means of a multi-logical volume.For Hyper-V, the size limit for the VHD format is also

Configure multi-path replication in CentOS 6.3 1. Determine whether the system follows the multipath rpm-qa| grep device-mapper-multipath 2. Reload the new HBA storage (this step is not required if it is not the HBA storage) modprobe-rlpfc modprobelpfc 3. Install multipath yum install device-mapper-multipath 4. Che

Provisioning Services 7.8 Getting Started Tutorial Xi. Automatic update of virtual disks with version controlIn the actual production environment, to ensure the stable operation of the system, to prevent the failure of the system paralysis, so the failover, high availability is particularly important.From the components involved in the PVS deployment, there are several ways to achieve availability:1. Active Directory DC2. DHCP server3. Database SQL4. Network5. PVS server (TFTP server)6. StorageF

sets areCumulativeAnd areFull and complete releasesContaining all binaries-a patch set will include new bug fixes specific to that patch set level as well as bug fixes sorted in prior patch sets. Patch sets for desupported databases may be under controlled release; please contact Oracle Support for further advance ance. OGG v12.1.2 Patch Set Availability Notes Document ID Build Patch Description Database/Platform Available(Updated 11/18/2014) 1916205.1 2 Or

First, the preparatory workCentOS6.4 server 2 units (1 for Ip-san storage server, 1 for streaming media server)Iscsitatget SoftwareISCSI InitiatorSecond, install iSCSI target software (Ip-san server)Iscsitarget: Http://iscsitarget.sourceforge.net[[email protected] iSCSI] #tar-xzvfiscsitarget-1.4.20.1.tar.gz[[Email protected] iSCSI] #cd Iscsitarget-1.4.20.1[[email

A gb storage space is shared on the storage and mapped to the Linux system. The environment consists of two nodes. I. Test 1: Mount directly Format with fdisk as follows: [Root @ Rac1 u01] # fdisk-l ...... Disk/dev/SDK: 536.8 GB, 536870912000 bytes 255 heads, 63 sectors/track, 65270 Cylinders Units = cylinders of 16065*512 = 8225280 bytes Device boot start end blocks ID system /Dev/sdk1 1 65270 524281243 + 83 Linux ...... [Root @ rac1u01] # However, an error is reported when you create a file

blackouts and other conditions. We can use generators or batteries, and each server must have a redundant power supply and connect to different electrical outlets. Network facilities must also be fully redundant, including switches, routers, and hardware balanced load devices that we often use. The NIC should be bundled and should have redundant paths to all networks, including connections to the Internet. Redundant array of independent disks (RAID) technology should be used for storage Prev

recover data through raid reorganization and subsequent activation (backup is required to ensure backtracking of the solution. If the operating system of lefthand cannot be restored, you can also use frombyte recovery for lefthand to explain the volume of the restored raid. 3. When the file system or file in the volume fails, it is not related to lefthand itself, and can be restored directly on the client. We recommend that you add another host to be restored and use

simplifies installation, configuration, and ongoing cloud platform deployment management processes2.5 Graphical user interface (1) CloudStack provides an administrator Web interface to supply and manage the entire cloud platform (2) Web interfaces like end users are also provided to manage running virtual machines and templates,and theUI can be based on the needs of the server provider or the enterprise's Web Style for customization2.6 API and its extensibility CloudStack provides a rich API in

abnormal and the HostB cannot take over normally. Therefore, the hdisk0 lock cannot be released. At this time, you can try to use varyonvg-B datavg on HostB to unlock it, but it may not be successful (depending on the support of the storage vendor ). All in all, when a device is not used, please shut down after varyoffvg is normal. Use varyonvg-B with caution to unlock. 2) commands related to HACMP Normally, during the HACMP switchover, the/usr/es/sbin/cluster/events/utils/cl_disk_available scr

Add 4 more drives to the TARGETD server:Create a RAID5 and set up 1 backup failure disks:Mdadm-cv/dev/md0-n 3-l 5-x 1/dev/sd{b,c,d,e}To create a RAID array configuration file:Mdadm-ds >/etc/mdadm.confVim/etc/mdadm.confDevice/dev/sdb/dev/sdc/dev/sdd/dev/sdearray/dev/md0 metadata=1.2 spares=2 name=localhost.localdomain:0 Uuid=5d5e7663:aa6e6ba2:0ece43d3:6b4c14d2Installing the TARGETD and TARGETCLI kitsYum install-y targetd targetcliStart the serviceSystemctl Start targetdSystemctl Enable targetdCre

enterprise to maximize their utilization. It is to be noted that the Xen open source version does not currently support the ability to automatically migrate dynamically when a fault is DOM0 on the sensor.4. It makes it easier to add computing power to the system configuration when needed.5. You can replace the hardware as needed without interrupting the service running on that hardware.Just knowing that the benefits of dynamic migration are not enough, it's time to implement Xen dynamic real-ti

Https://fedoraproject.org/wiki/Scsi-target-utils_Quickstart_Guide About This page are intended to outline a series of steps need to quickly get a scsi-target-utils based ISCSI software Target working. Most of these instructions can also is found in a README provided by the Scsi-target-utils package (See/usr/share/doc/scs I-TARGET-UTILS-*/README.ISCSI). installation Start by installing the Scsi-target-utils package using DNF: # DNF Install Scsi-targe