Formidable Availability Messaging Notion Using AXIGEN, Heartbeat and DRBD
This clear paper discusses a high-availability thought for the AXIGEN Packages Server, using the Heartbeat parcel with DRBD. AXIGEN is a proprietary messaging impression while both Heartbeat and DRBD are ajar source software released under the GNU General Licence (GPL). These software letter can be used well-organized to shape scalable and highly available integrated swarm messaging applications on the Linux operating system.
Products Overview
AXIGEN (http://www.axigen.com/mail-server/isp/) - Leveraging on proprietary technologies SmartProcessing , UltraStorage and GrowSecure , the AXIGEN Dispatch Server delivers redundancy at the send protocol akin of a messaging solution, as hardy as for the actual memo container storage.
AXIGEN is a carrier-class messaging sense with new email filtering and routing capabilities, too featuring groupware and original collaboration functionalities, and backed up at the alike future by sorrounding the clock, highly capable scientific support.
Heartbeat (http://www.linux-ha.org/Heartbeat) - A essential allotment of the High-Availability Linux project, Heartbeat provides core cluster government services, including membership, communication, resource monitoring and governance services, IP direction takeover etc. Heartbeat story 1.2.3 supports multiple IP addresses and a child's play two knot primary/secondary model.
When used with AXIGEN in a cluster environment, multiple Heartbeat pairs, everyone of them consisting of two nodes, can be configured in adjustment to bed larger clusters with the supplementary guidance of a layer 4-7 load balancer, a LDAP centralized user database and, of course, AXIGEN proxy nodes. With the newly-released narration 2.0.0 of Heartbeat, the two knob amount border of the cluster is raised.
DRBD (http://www.drbd.org/) - It is a block slogan or disk replication technology that can be viewed as network RAID-1. It can be used effectively to mirror a total block device via a network onto another block device. Thus, DRBD involves two block devices, one labelled as relevant (local) and the other labeled as secondary (remote/backup/standby).
Every engross method to the valuable community device is written to disk and and sent to the other host across the network to be written to the secondary device. The remote host (secondary) writes the material to its configured disk. Whether the leading growth fails, then the secondary excrescence can haul over in a usual failover scenario.
Belief Architecture & Implementation
In the idea examined, DRBD can be viewed as a resource that is controlled by Heartbeat. This 'node management' layer is obvious from AXIGEN's objective of view. DRBD uses the underlying physical disk as a virtual device. This virtual device is essentially a DRBD resource that is used by AXIGEN to access the disk. When the DRBD resource is mythical 'active' on a specific node, it method that the disk configured as a DRBD resource is momentarily accessible and ready for I/O operations.
Products Overview
AXIGEN (http://www.axigen.com/mail-server/isp/) - Leveraging on proprietary technologies SmartProcessing , UltraStorage and GrowSecure , the AXIGEN Dispatch Server delivers redundancy at the send protocol akin of a messaging solution, as hardy as for the actual memo container storage.
AXIGEN is a carrier-class messaging sense with new email filtering and routing capabilities, too featuring groupware and original collaboration functionalities, and backed up at the alike future by sorrounding the clock, highly capable scientific support.
Heartbeat (http://www.linux-ha.org/Heartbeat) - A essential allotment of the High-Availability Linux project, Heartbeat provides core cluster government services, including membership, communication, resource monitoring and governance services, IP direction takeover etc. Heartbeat story 1.2.3 supports multiple IP addresses and a child's play two knot primary/secondary model.
When used with AXIGEN in a cluster environment, multiple Heartbeat pairs, everyone of them consisting of two nodes, can be configured in adjustment to bed larger clusters with the supplementary guidance of a layer 4-7 load balancer, a LDAP centralized user database and, of course, AXIGEN proxy nodes. With the newly-released narration 2.0.0 of Heartbeat, the two knob amount border of the cluster is raised.
DRBD (http://www.drbd.org/) - It is a block slogan or disk replication technology that can be viewed as network RAID-1. It can be used effectively to mirror a total block device via a network onto another block device. Thus, DRBD involves two block devices, one labelled as relevant (local) and the other labeled as secondary (remote/backup/standby).
Every engross method to the valuable community device is written to disk and and sent to the other host across the network to be written to the secondary device. The remote host (secondary) writes the material to its configured disk. Whether the leading growth fails, then the secondary excrescence can haul over in a usual failover scenario.
Belief Architecture & Implementation
In the idea examined, DRBD can be viewed as a resource that is controlled by Heartbeat. This 'node management' layer is obvious from AXIGEN's objective of view. DRBD uses the underlying physical disk as a virtual device. This virtual device is essentially a DRBD resource that is used by AXIGEN to access the disk. When the DRBD resource is mythical 'active' on a specific node, it method that the disk configured as a DRBD resource is momentarily accessible and ready for I/O operations.
From materials of: http://articlebin.com/view-High_Availability_Messaging_Solut~.html
Published: July 18, 2008
Published: July 18, 2008
Keywords:
drbd,
heartbeat drbd,
drbd resource,
drbd formidable,
drbd uses,
drbd viewed,
drbd block,
drbd ajar,
drbd axigen,
drbd clear
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