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8.4.x User's Guide 8.0 - 8.3.x Technical Publications Community Connecting Download Usage Support & Training
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LINBIT DRBD Users Guide 8.0-8.3Table of Contents About this guide disk io error guild wars 2 I. Introduction to DRBD 1. DRBD Fundamentals Kernel module User space administration tools Resources Resource
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roles 2. DRBD Features Single-primary mode Dual-primary mode Replication modes Multiple replication transports Efficient synchronization On-line device verification Replication traffic integrity checking Split brain notification how to fix skype disk io error and automatic recovery Support for disk flushes Disk error handling strategies Strategies for dealing with outdated data Three-way replication Long-distance replication with DRBD Proxy Truck based replication Floating peers II. Building, installing and configuring DRBD 3. Installing pre-built DRBD binary packages Packages supplied by LINBIT Packages supplied by hard disk io error distribution vendors 4. Building and installing DRBD from source Downloading the DRBD sources Checking out sources from the public DRBD source repository Building DRBD from source Checking build prerequisites Preparing the kernel source tree Preparing the DRBD build tree Building DRBD userspace utilities Compiling DRBD as a kernel module Building a DRBD RPM package Building a DRBD Debian package 5. Configuring DRBD Preparing your lower-level storage Preparing your network configuration Configuring your resource Example configuration The global section The common section The resource sections Enabling your resource for the first time The initial device synchronization Using truck based replication III. Working with DRBD 6. Common administrative tasks Checking DRBD status Retrieving status with drbd-overview Status information in /proc/drbd Connection states Resource roles Disk states Enabling and disabling resources Enabling resources Disabling resources Reconfiguring resources Promoting and demoting resources Enabling dual-primary mode Using on-line device verificat
8.4.x User's Guide 8.0 - 8.3.x Technical Publications Community Connecting Download Usage Support & Training LINBIT DRBD Users Guide 9.0Table of Contents Please Read This
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First I. Introduction to DRBD 1. DRBD Fundamentals 1.1. Kernel module 1.2. User sqlite disk io error space administration tools 1.3. Resources 1.4. Resource roles 2. DRBD Features 2.1. Single-primary mode 2.2. Dual-primary mode 2.3.
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Replication modes 2.4. More than 2-way redundancy 2.5. Automatic Promotion of Resources 2.6. Multiple replication transports 2.6.1. TCP Transport 2.6.2. RDMA Transport 2.6.3. Conclusion 2.7. Efficient synchronization 2.7.1. Variable-rate synchronization 2.7.2. https://www.drbd.org/doc/users-guide-83/s-handling-disk-errors Fixed-rate synchronization 2.7.3. Checksum-based synchronization 2.8. Suspended replication 2.9. On-line device verification 2.10. Replication traffic integrity checking 2.11. Split brain notification and automatic recovery 2.12. Support for disk flushes 2.13. Trim/Discard support 2.14. Disk error handling strategies 2.15. Strategies for dealing with outdated data 2.16. Three-way replication via stacking 2.17. Long-distance replication with DRBD Proxy 2.18. Truck based replication 2.19. Floating https://www.drbd.org/doc/users-guide-90/ch-troubleshooting peers 2.20. Data rebalancing (horizontal storage scaling) 2.21. DRBD client II. Building and installing the DRBD software 3. Installing pre-built DRBD binary packages 3.1. Packages supplied by LINBIT 3.2. Packages supplied by distribution vendors 3.2.1. SUSE Linux Enterprise Server 3.2.2. CentOS 3.2.3. Ubuntu Linux 3.2.4. Debian GNU/Linux III. Working with DRBD 4. Common administrative tasks - DRBD Manage 4.1. Initializing your cluster 4.2. Adding nodes to your cluster 4.2.1. Types of DRBD Manage nodes 4.2.2. Adding a control node 4.2.3. Adding a pure controller node 4.2.4. Adding a satellite node 4.2.5. Adding a pure client node 4.2.6. Adding an external node 4.3. Cluster configuration 4.4. Configuring storage plugins 4.4.1. Configuring ZFS 4.4.2. Discussion of the storage plugins 4.5. Creating and deploying resources/volumes 4.6. Managing snapshots 4.6.1. Creating a snapshot 4.6.2. Restoring a snapshot 4.6.3. Removing a snapshot 4.7. Checking the state of your cluster 4.8. Setting options for resources 4.9. Rebalancing data with DRBD Manage 4.10. Getting help 5. Common administrative tasks - Manually 5.1. Configuring DRBD 5.1.1. Preparing your lower-level storage 5.1.2. Preparing your network configu
at 10:04 PM In this post I want to show how to test what will happen with your cluster if you simply detach shared storage device from it. http://msutic.blogspot.com/2013/07/how-to-detach-storage-device-from.html VirtualBox is great tool for that purpose because you can test such scenario without involving many people or causing any damage. I am aware that virtual environment on my notebook is completely different environment http://www.centos.org/forums/viewtopic.php?t=27206&start=20 than production. Please let me know if this test is not even similar with situations that could happen in the production. Goal is to test OCFS2 node fencing after device is detached. My io error environment is HP notebook with Windows 7, VirtualBox 4.2.16 and two Oracle Linux 64bit virtual machines. Let the test begin... Shutdown virtual machines and create shareable virtual disk. C:\>cd "Program Files\Oracle\VirtualBox" > VBoxManage.exe createhd --filename D:\VirtualneMasine\ClusterSharedDisks\disk3.vdi ^ --size 1024 --format VDI --variant Fixed 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% Disk image created. UUID: 862b1d65-eb04-42b2-8a1e-eafafb5bbcd3 Connect disk to virtual machines Cluster1 and Cluster2. > VBoxManage.exe storageattach Cluster1 --storagectl "SATA" --port 5 --device 0 ^ disk io error --type hdd --medium D:\VirtualneMasine\ClusterSharedDisks\disk3.vdi --mtype shareable > VBoxManage.exe storageattach Cluster2 --storagectl "SATA" --port 5 --device 0 ^ --type hdd --medium D:\VirtualneMasine\ClusterSharedDisks\disk3.vdi --mtype shareable Start virtual machines and partition newly added disk on Cluster1 node. [root@cluster1 ~]# fdisk /dev/sdf Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4): 1 First cylinder (1-130, default 1): Using default value 1 Last cylinder or +size or +sizeM or +sizeK (1-130, default 130): Using default value 130 Command (m for help): p Disk /dev/sdf: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdf1 1 130 1044193+ 83 Linux Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. Inform the OS of partition table changes using p
Configuring, Troubleshooting server daemons such as Web and Mail Post Reply Print view Search Advanced search 33 posts 1 2 3 4 Next BartB Posts: 27 Joined: 2007/04/12 19:46:43 DRBD packages Quote Postby BartB » 2007/04/13 18:15:58 Big plans here I want to use CentOS 5 to setup a low-cost Xen cluster. I have two machines, and that's it To have shared storage, without a SAN (or dedicated NAS), I need to be able to somehow share my storage. DRBD is a very good option for it, but it is not included in CentOS 5.. will it be included, or do I have other options?My plan is to use DRBD to share to storage and GNBD/GFS to be able to share the filesystem Top BartB Posts: 27 Joined: 2007/04/12 19:46:43 Re: DRBD packages Quote Postby BartB » 2007/04/14 09:57:51 Right, compiled them, but not yet tested (no time )You can find them here:http://www.bartbaars.nl/drbd-8.0.2-3.x86_64.rpmhttp://www.bartbaars.nl/drbd-km-2.6.18_ ... x86_64.rpm Top BartB Posts: 27 Joined: 2007/04/12 19:46:43 Re: DRBD packages Quote Postby BartB » 2007/04/16 21:50:57 My private thread The RPM's work! Hopefully CentOS will support DRBD! Top BartB Posts: 27 Joined: 2007/04/12 19:46:43 Re: DRBD packages Quote Postby BartB » 2007/04/20 20:08:11 Right.. if anyone cares.. I also compiled Heartbeat..Download:http://www.bartbaars.nl/heartbeat-2.0.8-1.x86_64.rpmhttp://www.bartbaars.nl/heartbeat-ldire ... x86_64.rpmhttp://www.bartbaars.nl/heartbeat-pils- ... x86_64.rpmhttp://www.bartbaars.nl/heartbeat-stoni ... x86_64.rpmNot yet tested, again no time Top z00dax Posts: 220 Joined: 2004/11/30 22:04:52 Location: London - UK Contact: Contact z00dax ICQ Website Re: DRBD packages Quote Postby z00dax » 2007/04/22 00:08:29 we are going to have drbg and heartbeat in centosplus, as we do for centos-4, just that the pkgs are being tested to make sure they work as desired before being pushed out to the public. So keep an eye open for that... maybe also join the centos-devel mailing list where most such stuff gets discussed Top crashatau Posts: 57 Joined: 2007/05/03 02:28:29 Location: Adelaide, Australia Contact: Contact crashatau Website Re: DRBD packages Quote Postby crashatau » 2007/05/08 05:10:56 I have a two machine cluster running GFS with Lock_DLM and DRBD 8 (0.8) in Primary / Primary mode.Works like a charm. So it is definitely possible.Whats wrong with compiling DRBD from source???I'll write a setup guide if anyone is intereste