.
Extent mobility is an EMC VPLEX mechanism to move all data from a source extent to a target
extent. It is completely non-disruptive to any layered devices, and completely transparent to
hosts using virtual volumes involving those devices. Over time storage volumes can become
fragmented by adding and deleting extents. Extent mobility can be used to help defrag
fragmented storage volumes. Extent mobility can not occur across clusters.
extent. It is completely non-disruptive to any layered devices, and completely transparent to
hosts using virtual volumes involving those devices. Over time storage volumes can become
fragmented by adding and deleting extents. Extent mobility can be used to help defrag
fragmented storage volumes. Extent mobility can not occur across clusters.
The data on devices can be moved to other devices within the same cluster or at remote cluster in
a VPLEX Metro. The same cannot be said for extent mobility as data on extents can only be
moved to other extents within the same cluster
a VPLEX Metro. The same cannot be said for extent mobility as data on extents can only be
moved to other extents within the same cluster
The data mobility feature allows you to non-disruptively move data on an extent or device to
another extent or device in the same cluster. The procedure for moving extents and devices is the
same and uses either devices or extents as the source or target.
You can run up to a total of 25 extent and device migrations concurrently. The system allocates
resources and queues any remaining mobility jobs as necessary. View the status and progress of
a mobility job in Mobility Central.
Mobility Central provides a central location to create, view, and manage all extent and device
mobility jobs.
another extent or device in the same cluster. The procedure for moving extents and devices is the
same and uses either devices or extents as the source or target.
You can run up to a total of 25 extent and device migrations concurrently. The system allocates
resources and queues any remaining mobility jobs as necessary. View the status and progress of
a mobility job in Mobility Central.
Mobility Central provides a central location to create, view, and manage all extent and device
mobility jobs.
A Distributed Device is a RAID-1 device that is created within a VPLEX Metro or Geo. The
distributed device is composed of two local devices that exist at each site and are mirrors of each
other. Read and write operations pass through the VPLEX WAN. Data is protected because writes
must travel to the back-end storage of both clusters before being acknowledged to the host.
Metro offers synchronous updates to the distributed device while Geo offers an asynchronous
method to allow for greater distances between sites
distributed device is composed of two local devices that exist at each site and are mirrors of each
other. Read and write operations pass through the VPLEX WAN. Data is protected because writes
must travel to the back-end storage of both clusters before being acknowledged to the host.
Metro offers synchronous updates to the distributed device while Geo offers an asynchronous
method to allow for greater distances between sites
Distributed devices are mirrored between clusters in a VPLEX Metro. In order to create a
distributed device a local device must exist at both sites. The distributed RAID-1 device that is
created upon the two local devices can only be as large as the smaller of the two devices. This is
due to the way RAID-1 operates. Distributed devices are created through the Distributed Devices
option.
distributed device a local device must exist at both sites. The distributed RAID-1 device that is
created upon the two local devices can only be as large as the smaller of the two devices. This is
due to the way RAID-1 operates. Distributed devices are created through the Distributed Devices
option.
VPLEX Consistency groups aggregate volumes together to ensure the common application of a set
of properties to the entire group. Consistency Groups are created for sets of volumes that require
the same I/O behavior in the event of a link failure, like those from a single application. In the
event of a director, cluster, or inter-cluster link failure, Consistency Groups prevents possible data
corruption. The optional VPLEX Witness failure recovery semantics apply only to volumes in
Consistency Groups. In addition, you can even move a Consistency Group from one cluster to
another if required.
of properties to the entire group. Consistency Groups are created for sets of volumes that require
the same I/O behavior in the event of a link failure, like those from a single application. In the
event of a director, cluster, or inter-cluster link failure, Consistency Groups prevents possible data
corruption. The optional VPLEX Witness failure recovery semantics apply only to volumes in
Consistency Groups. In addition, you can even move a Consistency Group from one cluster to
another if required.
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